The following is a list of Historic Civil Engineering Landmarks as designated by the American Society of Civil Engineers

American Society of Civil Engineers

The American Society of Civil Engineers is a professional body founded in 1852 to represent members of the civil engineering profession worldwide. It is the oldest national engineering society in the United States. ASCE's vision is to have engineers positioned as global leaders who strive toward...

 since it began the program in 1964. The designation is granted to projects, structures, and sites in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 (National Historic Civil Engineering Landmarks) and the rest of the world (International Historic Civil Engineering Landmarks). As of 2011, there are 254 landmarks included on the list. Sections or chapters of the American Society of Civil Engineers may also designate state or local landmarks within their areas; those landmarks are not listed here.

Ref#	Year added	Name	Image	Built	Location	Region/state	Country	Category
1	1966	Bollman Truss Bridge Bollman Truss Railroad Bridge The Bollman Truss Railroad Bridge at Savage, Maryland is the sole surviving example of a revolutionary design in the history of American bridge engineering. The double-span truss bridge is one of the oldest standing iron railroad bridges in the United States. It was the first successful all-metal...		1869	Savage Savage, Maryland Savage is a historic town located in Howard County, Maryland, about south of Baltimore and north of Washington, D.C. It is situated close to the city of Laurel and to the planned community of Columbia.A rich vein of American industrial history lies in Savage...	Maryland Maryland Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
2	1967	Bidwell Bar Bridge Bidwell Bar Bridge The Bidwell Bar Bridge, in Oroville, California, refers to two suspension bridges which cross different parts of Lake Oroville. The original Bidwell Bar Bridge was the first steel suspension bridge in California. The $35,000, 240-foot long original was completed in December 1855, and was built of...		1856	Oroville Oroville, California Oroville is the county seat of Butte County, California. The population was 15,506 at the 2010 census, up from 13,004 at the 2000 census...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
3	1967	Erie Canal Erie Canal The Erie Canal is a waterway in New York that runs about from Albany, New York, on the Hudson River to Buffalo, New York, at Lake Erie, completing a navigable water route from the Atlantic Ocean to the Great Lakes. The canal contains 36 locks and encompasses a total elevation differential of...		1825	Hudson River Hudson River The Hudson is a river that flows from north to south through eastern New York. The highest official source is at Lake Tear of the Clouds, on the slopes of Mount Marcy in the Adirondack Mountains. The river itself officially begins in Henderson Lake in Newcomb, New York...  to Lake Erie Lake Erie Lake Erie is the fourth largest lake of the five Great Lakes in North America, and the tenth largest globally. It is the southernmost, shallowest, and smallest by volume of the Great Lakes and therefore also has the shortest average water residence time. It is bounded on the north by the...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
4	1967	Middlesex Canal Middlesex Canal The Middlesex Canal was a 27-mile barge canal connecting the Merrimack River with the port of Boston. When operational it was 30 feet wide, and 3 feet deep, with 20 locks, each 80 feet long and between 10 and 11 feet wide...		1803	Middlesex County Middlesex County, Massachusetts -National protected areas:* Assabet River National Wildlife Refuge* Great Meadows National Wildlife Refuge* Longfellow National Historic Site* Lowell National Historical Park* Minute Man National Historical Park* Oxbow National Wildlife Refuge...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
5	1968	Central Pacific Railroad Central Pacific Railroad The Central Pacific Railroad is the former name of the railroad network built between California and Utah, USA that formed part of the "First Transcontinental Railroad" in North America. It is now part of the Union Pacific Railroad. Many 19th century national proposals to build a transcontinental...		1863–1869	Sacramento Sacramento Sacramento is the capital of the state of California, in the United States of America.Sacramento may also refer to:- United States :*Sacramento County, California*Sacramento, Kentucky*Sacramento – San Joaquin River Delta...  eastward	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
6	1968	Durango-Silverton Branch of the D&RGW RR Durango and Silverton Narrow Gauge Railroad The Durango and Silverton Narrow Gauge Railroad is a narrow gauge heritage railroad that operates of track between Durango and Silverton, in the US state of Colorado...		1882	Durango Durango, Colorado The City of Durango is a Home Rule Municipality that is the county seat and the most populous city of La Plata County, Colorado, United States. The United States Census Bureau said that the city population was 16,887 in 2010 census.-History:...	Colorado Colorado Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
7	1968	Ellicott's Stone Ellicott's Stone Ellicott’s Stone, also known as the Ellicott Stone, is a boundary marker in northern Mobile County, Alabama. It was placed on April 10, 1799 by a joint U.S.-Spanish survey party headed by Andrew Ellicott...		1799	Mobile Mobile, Alabama Mobile is the third most populous city in the Southern US state of Alabama and is the county seat of Mobile County. It is located on the Mobile River and the central Gulf Coast of the United States. The population within the city limits was 195,111 during the 2010 census. It is the largest...	Alabama Alabama Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
8	1968	Acequias of San Antonio Espada Acequia The Espada Acequia, or Piedras Creek Aqueduct, was built by Franciscan friars in 1731 in what is now San Antonio, Texas, United States. It was built to supply irrigation water to the lands near Mission San Francisco de la Espada, today part of San Antonio Missions National Historical Park...		1718	San Antonio	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
9	1968	Joining of the Rails - Transcontinental Railroad		1869	Promontory Promontory, Utah Promontory in Box Elder County, Utah, United States, is notable as the location of Promontory Summit where the United States' Transcontinental Railroad was officially completed on May 10, 1869....	Utah Utah Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
10	1968	Wheeling Suspension Bridge Wheeling Suspension Bridge The Wheeling Suspension Bridge is a suspension bridge spanning the main channel of the Ohio River at Wheeling, West Virginia. It was the largest suspension bridge in the world from 1849 until the Queenston-Lewiston Bridge was opened in 1851. It was designed by Charles Ellet Jr., who also worked...		1849	Wheeling Wheeling, West Virginia Wheeling is a city in Ohio and Marshall counties in the U.S. state of West Virginia; it is the county seat of Ohio County. Wheeling is the principal city of the Wheeling Metropolitan Statistical Area...	West Virginia West Virginia West Virginia is a state in the Appalachian and Southeastern regions of the United States, bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the northeast and Maryland to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
11	1969	Alvord Lake Bridge Alvord Lake Bridge The Alvord Lake Bridge was the first reinforced concrete bridge built in America. It was built in 1889 by Ernest L. Ransome, an innovator in reinforced concrete design, mixing equipment, and construction systems...		1889	San Francisco	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
12	1969	Charleston - Hamburg Railroad South Carolina Canal and Rail Road Company Chartered in 1827, the South Carolina Canal and Rail Road Company ran scheduled steam service over its line from Charleston, South Carolina, to Hamburg, South Carolina. beginning in 1833. At that time it was the longest railroad in the world...		1833	Charleston Charleston, South Carolina Charleston is the second largest city in the U.S. state of South Carolina. It was made the county seat of Charleston County in 1901 when Charleston County was founded. The city's original name was Charles Towne in 1670, and it moved to its present location from a location on the west bank of the...	South Carolina South Carolina South Carolina is a state in the Deep South of the United States that borders Georgia to the south, North Carolina to the north, and the Atlantic Ocean to the east. Originally part of the Province of Carolina, the Province of South Carolina was one of the 13 colonies that declared independence...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
13	1970	Ascutney Mill Dam Ascutney Mill Dam Ascutney Mill Dam, also known as the Windsor Upper Dam and the Mill Pond Dam is a arch-gravity dam which is one of the oldest and among the earliest storage dams in the United States. It is made of cut granite and is located in Windsor, Vermont in Windsor County near the Connecticut River where it...		1834	Windsor Windsor, Vermont Windsor is a town in Windsor County, Vermont, United States. The population was 3,756 at the 2000 census.-History:One of the New Hampshire grants, Windsor was chartered as a town on July 6, 1761 by Colonial Governor Benning Wentworth. It was first settled in August 1764 by Captain Steele Smith and...	Vermont Vermont Vermont is a state in the New England region of the northeastern United States of America. The state ranks 43rd in land area, , and 45th in total area. Its population according to the 2010 census, 630,337, is the second smallest in the country, larger only than Wyoming. It is the only New England...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
14	1970	Bridgeport Covered Bridge Bridgeport Covered Bridge The Bridgeport Covered Bridge is located in Bridgeport, Nevada County, California, southwest of French Corral and north of Lake Wildwood. It is used as a pedestrian crossing over the South Yuba River. The bridge was designed by David Ingefield Wood, and built in 1862. Its lumber came from Plum...		1862	Nevada County Nevada County, California Nevada County is a county located in the Sierra Nevada of California, in the Mother Lode country. As of 2010 its population was 98,764. The county seat is Nevada City.-History:Nevada County was created in 1851 from parts of Yuba County....	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
15	1970	Cornish–Windsor Covered Bridge		1866, rebuilt 1988	Windsor Windsor, Vermont Windsor is a town in Windsor County, Vermont, United States. The population was 3,756 at the 2000 census.-History:One of the New Hampshire grants, Windsor was chartered as a town on July 6, 1761 by Colonial Governor Benning Wentworth. It was first settled in August 1764 by Captain Steele Smith and...  to Cornish Cornish, New Hampshire Cornish is a town in Sullivan County, New Hampshire, United States. The population was 1,640 at the 2010 census. Cornish has three covered bridges. Each August, it is home to the Cornish Fair.-History:...	Vermont Vermont Vermont is a state in the New England region of the northeastern United States of America. The state ranks 43rd in land area, , and 45th in total area. Its population according to the 2010 census, 630,337, is the second smallest in the country, larger only than Wyoming. It is the only New England...  and New Hampshire New Hampshire New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
16	1970	Frankford Avenue Bridge Frankford Avenue Bridge The Frankford Avenue Bridge, also known as the Pennypack Creek Bridge, the Pennypack Bridge, the Holmesburg Bridge, and the King's Highway Bridge, erected in 1697 or 1698 in the Holmesburg section of Northeast Philadelphia, Pennsylvania, is the oldest surviving roadway bridge in the United States...		1697	Philadelphia	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
17	1970	Potowmack Canal and Locks Potomac Canal Historic District Potomac Canal Historic District, also known as Patowmack Canal Historic District or Potowmack Canal Historic District, is at the Great Falls of the Potomac River and is part of Great Falls Park...		1799	Great Falls Great Falls, Virginia Great Falls is a census-designated place in Fairfax County, Virginia, United States. The population was 15,427 at the 2010 census.Although primarily a bedroom community for Washington, D.C., one major attraction is Great Falls Park which overlooks the Great Falls of the Potomac River, for which...	Virginia Virginia The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
18	1970	Theodore Roosevelt Dam & Salt River Project Salt River Project The Salt River Project is the umbrella name for two separate entities: the Salt River Project Agricultural Improvement and Power District, an agency of the state of Arizona that serves as an electrical utility for the Phoenix metropolitan area, and the Salt River Valley Water Users' Association, a...		1911		Arizona Arizona Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
19	1970	Union Canal Tunnel		1828	Lebanon Lebanon, Pennsylvania Lebanon, formerly known as Steitztown, is a city in and the county seat of Lebanon County, Pennsylvania, United States. The population was 25,477 at the 2010 census, a 4.2% increase from the 2000 count of 24,461...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
20	1971	Bethlehem Waterworks Bethlehem Waterworks Bethlehem Waterworks, also known as Old Waterworks or 1762 Waterworks is a site significant for its age.It was declared a National Historic Landmark in 1981....		1761	Bethlehem Bethlehem, Pennsylvania Bethlehem is a city in Lehigh and Northampton Counties in the Lehigh Valley region of eastern Pennsylvania, in the United States. As of the 2010 census, the city had a total population of 74,982, making it the seventh largest city in Pennsylvania, after Philadelphia, Pittsburgh, Allentown, Erie,...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
21	1971	Druid Lake Dam Druid Hill Park Druid Hill Park is a urban park in northwest Baltimore, Maryland. Its boundaries are marked by Druid Park Drive , Swann Drive and Reisterstown Road , and the Jones Falls Expressway...		1871	Baltimore Baltimore Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore...	Maryland Maryland Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
22	1971	Eads Bridge Eads Bridge The Eads Bridge is a combined road and railway bridge over the Mississippi River at St. Louis, connecting St. Louis and East St. Louis, Illinois....		1874	St. Louis St. Louis, Missouri St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...	Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
23	1971	First Owens River - Los Angeles Aqueduct		1913	Owens Valley Owens Valley Owens Valley is the arid valley of the Owens River in eastern California in the United States, to the east of the Sierra Nevada and west of the White Mountains and Inyo Mountains on the west edge of the Great Basin section...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
24	1971	Mormon Tabernacle		1867	Salt Lake City	Utah Utah Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
25	1972	Cabin John Aqueduct Union Arch Bridge The Union Arch Bridge, also called the "Cabin John Bridge," is a historic masonry structure in Cabin John, Maryland. It was designed as part of the Washington Aqueduct and as a roadway bridge. The bridge construction began in 1857 and was completed in 1864. The roadway surface was added later...		1863	Cabin John Cabin John, Maryland Cabin John is a census-designated place and an unincorporated area in Montgomery County, Maryland, United States. The placename is a corruption of its original name of "Captain John's Mills."-Geography:...	Maryland Maryland Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
26	1972	Chesbroughs Water Supply System Chicago Chicago Water Tower The Chicago Water Tower is a contributing property in the Old Chicago Water Tower District landmark district. It is located at 806 North Michigan Avenue along the Magnificent Mile shopping district in the Near North Side community area of Chicago, Illinois...		1869	Chicago Chicago Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...	Illinois Illinois Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
27	1972	Brooklyn Bridge Brooklyn Bridge The Brooklyn Bridge is one of the oldest suspension bridges in the United States. Completed in 1883, it connects the New York City boroughs of Manhattan and Brooklyn by spanning the East River...		1883	New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
28	1972	Gunnison Tunnel Gunnison Tunnel The Gunnison Tunnel is a 5.8 mile irrigation tunnel constructed between 1905 and 1909 by the Bureau of Reclamation. At the time of its completion, it was the longest irrigation tunnel in the world...		1909	Montrose Montrose, Colorado The City of Montrose is a Home Rule Municipality that is the county seat and the most populous city of Montrose County, Colorado, United States. The United States Census Bureau estimates that the city population was 15,479 in 2005. The main road that leads in and out of Montrose is U.S...	Colorado Colorado Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
29	1972	Roebling's Delaware Aqueduct Roebling's Delaware Aqueduct -External links:...  of the Delaware & Hudson Canal		1848, restored 1983	Lackawaxen Lackawaxen Township, Pennsylvania Lackawaxen Township is the largest and northernmost township in Pike County, Pennsylvania. The population was 4,994 at the 2010 census. The Delaware River, which marks the eastern boundary of the township, joins the Lackawaxen River at Lackawaxen Village...  to Minisink Ford Minisink Ford, New York Minisink Ford is a hamlet on the Delaware River fifteen miles northwest of Port Jervis. It is in the town of Highland, Sullivan County, New York, in the United States.-History:...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...  & New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
30	1972	Miami Conservancy District Miami Conservancy District The Miami Conservancy District is a river management agency operating in Southwest Ohio to control flooding of the Great Miami River and its tributaries. It was organized in 1914 following the catastrophic Great Dayton Flood of the Great Miami River in March 1913, which hit Dayton, Ohio...		1922	near Dayton Dayton, Ohio Dayton is the 6th largest city in the U.S. state of Ohio and the county seat of Montgomery County, the fifth most populous county in the state. The population was 141,527 at the 2010 census. The Dayton Metropolitan Statistical Area had a population of 841,502 in the 2010 census...	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
31	1973	Buffalo Bill Dam Buffalo Bill Dam Buffalo Bill Dam is a concrete arch-gravity dam on the Shoshone River in the U.S. state of Wyoming. The dam is named after the famous old West figure William "Buffalo Bill" Cody who founded the nearby town of Cody and who owned much of the land now covered by the reservoir formed by the dam, which...		1910	Cody Cody, Wyoming Cody is a city in Park County, Wyoming, United States. It is named after William Frederick Cody, primarily known as Buffalo Bill, from William Cody's part in the creation of the original town. The population was 9,520 at the 2010 census...	Wyoming Wyoming Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
32	1973	Cheesman Reservoir		1905	Southwest of Denver	Colorado Colorado Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
33	1973	Embudo Stream Gauging Station		1889	Embudo Embudo, New Mexico Embudo is an unincorporated community in Rio Arriba County, New Mexico, United States. It is on NM State Road 68. The Embudo Station is located 2.9 miles south of the intersection of NM State Road 75, near where the Embudo River flows into the Rio Grande.The name "Embudo", meaning "funnel" in...	New Mexico New Mexico New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
34	1973	Ingalls Building Ingalls Building The Ingalls Building, built in 1903 in Cincinnati, Ohio, was the world's first reinforced concrete skyscraper. The 15 story building was designed by the Cincinnati architectural firm Elzner & Anderson and was named for its primary financial investor, Melville E. Ingalls...		1903	Cincinnati	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
35	1973	Pelton Impulse Water Wheel		1878	Camptonville Camptonville, California Camptonville is a small town and census-designated place located in northeastern Yuba County, California. The town is located northeast of Marysville, off Highway 49 between Downieville and Nevada City. It is located on a ridge between the North Fork and Middle Fork of the Yuba River, not far...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
36	1973	Starrucca Viaduct Starrucca Viaduct Starrucca Viaduct is a stone arch bridge that spans Starrucca Creek near Lanesboro, Pennsylvania, in the United States. At the time of its construction, the bridge was thought to be the most expensive railway bridge in the world, at a cost of $320,000 , and it was the largest stone rail viaduct in...		1848	Lanesboro Lanesboro, Pennsylvania Lanesboro is a borough in Susquehanna County, Pennsylvania, United States. The population was 588 at the 2000 census.-Geography:Lanesboro is located at ....	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
37	1974	Kansas City Park and Boulevard System		1893 to 1915	Kansas City Kansas City, Missouri Kansas City, Missouri is the largest city in the U.S. state of Missouri and is the anchor city of the Kansas City Metropolitan Area, the second largest metropolitan area in Missouri. It encompasses in parts of Jackson, Clay, Cass, and Platte counties...	Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
38	1974	Milwaukee Metropolitan Sewage Treatment Plant Milwaukee Metropolitan Sewerage District The Milwaukee Metropolitan Sewerage District is a state-chartered government agency which provides wastewater services for 28 municipalities within Milwaukee County and also portions of the surrounding counties....		1919	Milwaukee	Wisconsin Wisconsin Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	Water supply & control
39	1974	Philadelphia Municipal Water Supply Fairmount Water Works The Fairmount Water Works in Philadelphia, Pennsylvania was Philadelphia's second municipal waterworks. Designed in 1812 by Frederick Graff and built between 1812 and 1872, it operated until 1909, winning praise for its design and becoming a popular tourist attraction...		1801	Philadelphia	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
40	1974	Stone Arch Bridge		1883	Minneapolis	Minnesota Minnesota Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
41	1975	Castillo de San Marcos Castillo de San Marcos The Castillo de San Marcos site is the oldest masonry fort in the United States. It is located in the city of St. Augustine, Florida. Construction was begun in 1672 by the Spanish when Florida was a Spanish territory. During the twenty year period of British possession from 1763 until 1784, the...		1695	St. Augustine St. Augustine, Florida St. Augustine is a city in the northeast section of Florida and the county seat of St. Johns County, Florida, United States. Founded in 1565 by Spanish explorer and admiral Pedro Menéndez de Avilés, it is the oldest continuously occupied European-established city and port in the continental United...	Florida Florida Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
42	1975	Croton Water Supply System Croton Aqueduct The Croton Aqueduct or Old Croton Aqueduct was a large and complex water distribution system constructed for New York City between 1837 and 1842...		1842	New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
43	1975	Folsom Hydroelectric Power System Folsom Powerhouse State Historic Park Folsom Powerhouse State Historic Park is a historical site located in Folsom near Sacramento, California, in the United States. Built in the late 19th century by the Natoma Water and Mining Company and prison labor from Folsom Prison, the hydroelelectric powerhouse first delivered power to...		1895	Folsom Folsom, California Folsom is a city in Sacramento County, California, United States. Folsom is most commonly known for its famous Folsom Prison. The population was 72,203 at the 2010 census....	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
44	1975	Granite Railway Granite Railway -References:** privately printed for The Granite Railway Company, 1926.* Scholes, Robert E. , .******Dutton, E.P. Published 1867. A good map of roads and rail lines around Quincy and Milton including the Granite Railroad.* * *...		1826	Quincy Quincy, Massachusetts Quincy is a city in Norfolk County, Massachusetts, United States. Its nicknames are "City of Presidents", "City of Legends", and "Birthplace of the American Dream". As a major part of Metropolitan Boston, Quincy is a member of Boston's Inner Core Committee for the Metropolitan Area Planning Council...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
45	1975	Hoosac Tunnel Hoosac Tunnel The Hoosac Tunnel is a 4.75-mile-long railroad tunnel in western Massachusetts which passes through the Hoosac Range, an extension of Vermont's Green Mountains. Work began in 1848 and was finally completed in 1875...		1875	Berkshire County Berkshire County, Massachusetts Berkshire County is a non-governmental county located on the western edge of the U.S. state of Massachusetts. As of the 2010 census, the population was 131,219. Its largest city and traditional county seat is Pittsfield...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
46	1975	Lawrence Experiment Station Lawrence Experiment Station The Lawrence Experiment Station, now known as the Senator William X. Wall Experiment Station, was the world's first trial station for drinking water purification and sewage treatment...		1886	Lawrence Lawrence, Massachusetts Lawrence is a city in Essex County, Massachusetts, United States on the Merrimack River. According to the 2010 U.S. Census, the city had a total population of 76,377. Surrounding communities include Methuen to the north, Andover to the southwest, and North Andover to the southeast. It and Salem are...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
47	1975	Marlette Lake Water System Marlette Lake Water System The Marlette Lake Water System was created to provide water for the silver mining boom in Virginia City, Nevada. These structures are now listed as a Historic Civil Engineering Landmark by the American Society of Civil Engineers, and are also listed on the National Register of Historic Places.The...		1873 to 1887	Virginia City Virginia City, Nevada Virginia City is a census-designated place that is the county seat of Storey County, Nevada. It is part of the Reno–Sparks Metropolitan Statistical Area. The population was 855 at the 2010 Census.- History :...	Nevada Nevada Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
48	1975	Mount Washington Cog Railway		1869	Mount Washington Mount Washington (New Hampshire) Mount Washington is the highest peak in the Northeastern United States at , famous for dangerously erratic weather. For 76 years, a weather observatory on the summit held the record for the highest wind gust directly measured at the Earth's surface, , on the afternoon of April 12, 1934...	New Hampshire New Hampshire New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
49	1975	Smithfield Street Bridge Smithfield Street Bridge The Smithfield Street Bridge is a lenticular truss bridge crossing the Monongahela River in Pittsburgh, Pennsylvania, USA.The bridge was designed by Gustav Lindenthal, the engineer who later designed the Hell Gate Bridge. The bridge was built between 1881–83, opening for traffic on March 19, 1883....		1883	Pittsburgh	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
50	1975	Tunkhannock Viaduct Tunkhannock Viaduct Tunkhannock Viaduct is a concrete deck arch bridge that spans the Tunkhannock Creek in Nicholson, Wyoming County, Pennsylvania in the United States. It was the largest concrete bridge in the U.S. when it opened, and remained so even 50 years later.The bridge contains about of concrete and of steel...		1915	Nicholson Nicholson, Pennsylvania Nicholson is a borough in Wyoming County, Pennsylvania, United States. The population was 713 at the 2000 census.-Geography:Nicholson is located at ....	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
51	1976	Crozet's Blue Ridge Tunnel Blue Ridge Tunnel The Blue Ridge Tunnel, also known as the Crozet Tunnel, was the longest of four tunnels built on the Blue Ridge Railroad to cross the Blue Ridge Mountains at Rockfish Gap near Afton Mountain in central Virginia...		1858	Waynesboro Waynesboro, Virginia Waynesboro, deriving its name from General Anthony Wayne, is an independent city surrounded by Augusta County in the U.S. state of Virginia. The population was 21,006 in 2010.....	Virginia Virginia The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
52	1976	Cumbres and Toltec Scenic Railway		1880	Chama, New Mexico Chama, New Mexico Chama is a village in Rio Arriba County, New Mexico, United States. The population was 1,199 at the 2000 census. It is a small village, but tourism is starting to help the town's economy .-Geography:...  to Antonito, Colorado Antonito, Colorado The Town of Antonito is a statutory town located in Conejos County, Colorado, United States. As of the 2000 census, the town's population was 873.-Geography:...	New Mexico New Mexico New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...  and Colorado Colorado Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
53	1976	Elephant Butte Dam		1916	Truth or Consequences Truth or Consequences, New Mexico Truth or Consequences is a spa city and the county seat of Sierra County, New Mexico, United States. As of the 2000 census, the population was 7,289. It is commonly known within New Mexico as T or C....	New Mexico New Mexico New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
54	1976	First Concrete Pavement Court Avenue Court Avenue is a small street in downtown Bellefontaine, Ohio, United States, located adjacent to the Logan County Courthouse. Constructed in 1891, it is known for being the first street in the United States to be paved with concrete.-Early history:...		1893	Bellefontaine Bellefontaine, Ohio Bellefontaine is a city in and the county seat of Logan County, Ohio, United States. The population was 13,069 at the 2000 census. It is the center of the Bellefontaine Micropolitan Statistical Area, as defined by the United States Census Bureau in 2003...	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
55	1976	International Boundary Marker#1		1855	El Paso El Paso, Texas El Paso, is a city in and the county seat of El Paso County, Texas, United States, and lies in far West Texas. In the 2010 census, the city had a population of 649,121. It is the sixth largest city in Texas and the 19th largest city in the United States...	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
56	1976	King's Road King's Highway (St. Augustine to Mexico) King's Highway was a route the Spanish laid in 1632, in part using traditional trails of Native Americans. They used it in the 17th century to connect the Spanish settlement of St. Augustine, Florida to Spanish colonies in Mexico. Initially the route ran from St. Augustine west through central...		1766 to 1775	New Smyrna New Smyrna Beach, Florida New Smyrna Beach is a city in Volusia County, Florida, United States. The population was 20,048 according to the 2000 census. As of 2007, the population recorded by the U.S. Census Bureau is 23,161.-History:...	Florida Florida Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
57	1976	National Road National Road The National Road or Cumberland Road was the first major improved highway in the United States to be built by the federal government. Construction began heading west in 1811 at Cumberland, Maryland, on the Potomac River. It crossed the Allegheny Mountains and southwestern Pennsylvania, reaching...		1811–1839	Cumberland, Maryland Cumberland, Maryland Cumberland is a city in the far western, Appalachian portion of Maryland, United States. It is the county seat of Allegany County, and the primary city of the Cumberland, MD-WV Metropolitan Statistical Area. At the 2010 census, the city had a population of 20,859, and the metropolitan area had a...  to Vandalia, Illinois Vandalia, Illinois Vandalia is a city in Fayette County, Illinois, United States, northeast of St. Louis, on the Kaskaskia River. From 1819 to 1839 it served as the state capital of Illinois. Vandalia was the western terminus of the National Road. Today it is the county seat of Fayette County and the home of the...	Midwest	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
58	1977	Charlestown Naval Dry Dock		1833	Boston Boston Boston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
59	1977	City Plan of Savannah Squares of Savannah, Georgia The city of Savannah, Georgia, United States, was laid out in 1769 around four open squares. The plan anticipated growth of the city and thus expansion of the grid; additional squares were added during the 18th and 19th centuries, and by 1851 there were twenty four squares in the city...		1733	Savannah Savannah, Georgia Savannah is the largest city and the county seat of Chatham County, in the U.S. state of Georgia. Established in 1733, the city of Savannah was the colonial capital of the Province of Georgia and later the first state capital of Georgia. Today Savannah is an industrial center and an important...	Georgia Georgia (U.S. state) Georgia is a state located in the southeastern United States. It was established in 1732, the last of the original Thirteen Colonies. The state is named after King George II of Great Britain. Georgia was the fourth state to ratify the United States Constitution, on January 2, 1788...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
60	1977	Great Falls Raceway and Power System Great Falls (Passaic River) The Great Falls of the Passaic River is a prominent waterfall, high, on the Passaic River in the city of Paterson in Passaic County in northern New Jersey in the United States. The Congress authorized its establishment as a National Historical Park in 2009...		1800	Paterson Paterson, New Jersey Paterson is a city serving as the county seat of Passaic County, New Jersey, United States. As of the 2010 United States Census, its population was 146,199, rendering it New Jersey's third largest city and one of the largest cities in the New York City Metropolitan Area, despite a decrease of 3,023...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
61	1977	First New York Subway Interborough Rapid Transit Company The Interborough Rapid Transit Company was the private operator of the original underground New York City Subway line that opened in 1904, as well as earlier elevated railways and additional rapid transit lines in New York City. The IRT was purchased by the City in June 1940...		1904	New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
62	1977	Mason-Dixon Line Mason-Dixon line The Mason–Dixon Line was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon in the resolution of a border dispute between British colonies in Colonial America. It forms a demarcation line among four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and...		1767		Maryland Maryland Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...  & Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
63	1977	Minot's Ledge Lighthouse		1860	off Scituate Scituate, Massachusetts Scituate is a seacoast town in Plymouth County, Massachusetts, United States, on the South Shore, midway between Boston and Plymouth. The population was 18,133 at the 2010 census....	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
64	1977	Mullan Road Mullan Road Mullan Road was the first wagon road to cross the Rocky Mountains to the Inland of the Pacific Northwest. It was built by US Army Lieut. John Mullan between the spring of 1859 and summer 1860. It led from Fort Benton, Montana, the navigational head of the Missouri River to Fort Walla Walla,...		1862	Walla Walla Walla Walla, Washington Walla Walla is the largest city in and the county seat of Walla Walla County, Washington, United States. The population was 31,731 at the 2010 census...	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
65	1977	Gosport Naval Dry Docks Drydock Number One, Norfolk Naval Shipyard Drydock Number One, Norfolk Naval Shipyard, also known as Drydock No. 1,is the site where the USS Merrimack was modified to be the Confederate Navy ironclad CSS Virginia. It is now included within the Norfolk Naval Shipyard...		1833	Norfolk Norfolk, Virginia Norfolk is an independent city in the Commonwealth of Virginia in the United States. With a population of 242,803 as of the 2010 Census, it is Virginia's second-largest city behind neighboring Virginia Beach....	Virginia Virginia The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
66	1977	Reversal of the Chicago River Chicago Sanitary and Ship Canal The Chicago Sanitary and Ship Canal, historically known as the Chicago Drainage Canal, is the only shipping link between the Great Lakes and the Mississippi River system, by way of the Illinois and Des Plaines Rivers...		1900	Chicago Chicago Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...	Illinois Illinois Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
67	1977	Vulcan Street Plant Vulcan Street Plant The Vulcan Street Plant is the world's first Edison hydroelectric central station. Built on the Fox River in Appleton, Wisconsin, the Vulcan Street Plant was put into operation on September 30, 1882...		1882	Appleton Appleton, Wisconsin Appleton is a city in Outagamie, Calumet, and Winnebago Counties in the U.S. state of Wisconsin. It is situated on the Fox River, 30 miles southwest of Green Bay and 100 miles north of Milwaukee. Appleton is the county seat of Outagamie County. The population was 78,086 at the 2010 census...	Wisconsin Wisconsin Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
68	1977	William E. Ward House William E. Ward House The William E. Ward House, known locally as Ward's Castle, is located on the state line between Rye Brook, New York and Greenwich, Connecticut, United States. It is a reinforced concrete structure built in the 1870s....		1876	Rye Rye (city), New York Rye is a city in Westchester County, New York, United States. It is separate from the town of Rye, which is larger than the city. Rye city, formerly the village of Rye, was part of the town until 1942, when it received its charter as a city, the most recent to be issued in New York...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
69	1978	Boston Subway Tremont Street Subway The Tremont Street Subway is a tunnel in Boston's subway system, and is the oldest subway tunnel in North America, opening on September 1, 1897. It was originally built as a tunnel to get streetcar lines off the streets, rather than a rapid transit line...		1897	Boston Boston Boston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
70	1978	Dunlap's Creek Bridge Dunlap's Creek Bridge Dunlap's Creek Bridge was the first cast iron, metal arch bridge in the United States. It was designed by Richard Delafield and built by the United States Army Corps of Engineers. Constructed from 1836 to 1839 on the National Road in Brownsville, Pennsylvania, it remains in use today...		1839	Brownsville Brownsville, Pennsylvania Brownsville is a borough in Fayette County, Pennsylvania, United States, officially founded in 1785 located 35 miles south of Pittsburgh along the Monongahela River...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
71	1978	Hudson and Manhattan Railroad Tunnel		1908	Jersey City Jersey City, New Jersey Jersey City is the seat of Hudson County, New Jersey, United States.Part of the New York metropolitan area, Jersey City lies between the Hudson River and Upper New York Bay across from Lower Manhattan and the Hackensack River and Newark Bay...  to New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...  & New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
72	1978	Newark International Airport		1928	Newark Newark, New Jersey Newark is the largest city in the American state of New Jersey, and the seat of Essex County. As of the 2010 United States Census, Newark had a population of 277,140, maintaining its status as the largest municipality in New Jersey. It is the 68th largest city in the U.S...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	aviation
73	1978	United States Military Academy United States Military Academy The United States Military Academy at West Point is a four-year coeducational federal service academy located at West Point, New York. The academy sits on scenic high ground overlooking the Hudson River, north of New York City...		1813	West Point West Point, New York West Point is a federal military reservation established by President of the United States Thomas Jefferson in 1802. It is a census-designated place located in Town of Highlands in Orange County, New York, United States. The population was 7,138 at the 2000 census...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
74	1979	Cleveland Hopkins Airport Cleveland Hopkins International Airport Cleveland Hopkins International Airport is a public airport located nine miles southwest of the central business district of Cleveland, a city in Cuyahoga County, Ohio, United States. The airport lies just within the city limits of Cleveland...		1925	Cleveland Cleveland, Ohio Cleveland is a city in the U.S. state of Ohio and is the county seat of Cuyahoga County, the most populous county in the state. The city is located in northeastern Ohio on the southern shore of Lake Erie, approximately west of the Pennsylvania border...	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	aviation
75	1979	Fink Deck Truss Bridge		1870	Lynchburg Lynchburg, Virginia Lynchburg is an independent city in the Commonwealth of Virginia. The population was 75,568 as of 2010. Located in the foothills of the Blue Ridge Mountains along the banks of the James River, Lynchburg is known as the "City of Seven Hills" or "The Hill City." Lynchburg was the only major city in...	Virginia Virginia The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
76	1979	Fink Through Truss Bridge		1858	Hamden	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
77	1979	Iron Bridge The Iron Bridge The Iron Bridge crosses the River Severn at the Ironbridge Gorge, by the village of Ironbridge, in Shropshire, England. It was the first arch bridge in the world to be made out of cast iron, a material which was previously far too expensive to use for large structures...		1779	Ironbridge Ironbridge Ironbridge is a settlement on the River Severn, at the heart of the Ironbridge Gorge, in Shropshire, England. It lies in the civil parish of The Gorge, in the borough of Telford and Wrekin...	West Midlands West Midlands (region) The West Midlands is an official region of England, covering the western half of the area traditionally known as the Midlands. It contains the second most populous British city, Birmingham, and the larger West Midlands conurbation, which includes the city of Wolverhampton and large towns of Dudley,...	England England England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...	bridges
78	1979	Moffat Tunnel Moffat Tunnel The Moffat Tunnel is a railroad and water tunnel that cuts through the Continental Divide in north-central Colorado. Named after Colorado railroad pioneer David Moffat, the tunnel's first railroad traffic passed through in February 1928....		1928	Winter Park Winter Park, Colorado Winter Park is a Home Rule Municipality in Grand County, Colorado, United States. The town population was 662 at the 2000 census, although tourists and seasonal workers significantly increase the population....	Colorado Colorado Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
79	1979	Rockville Bridge Rockville Bridge The Rockville Bridge, at the time of its completion in 1902, was, and still remains, the longest stone masonry arch railroad viaduct in the world. Constructed between 1900 - 1902 by the Pennsylvania Railroad, it has forty-eight 70-foot spans, for a total length of 3,820 feet .The bridge crosses...		1902	Harrisburg Harrisburg, Pennsylvania Harrisburg is the capital of Pennsylvania. As of the 2010 census, the city had a population of 49,528, making it the ninth largest city in Pennsylvania...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
80	1980	Goodyear Airdock Goodyear Airdock The Goodyear Airdock is an airship storage and construction hangar in Akron, Ohio.-History:Built and previously owned by the Goodyear-Zeppelin Corporation, later Goodyear Aerospace, it was constructed from April 20, 1929 to November 25, 1929, at a cost of $2.2 million...		1929	Akron Akron, Ohio Akron , is the fifth largest city in the U.S. state of Ohio and the county seat of Summit County. It is located in the Great Lakes region approximately south of Lake Erie along the Little Cuyahoga River. As of the 2010 census, the city had a population of 199,110. The Akron Metropolitan...	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	aviation
81	1980	Hydraulic-Inclined Plane System of the Morris Canal Morris Canal The Morris Canal was an anthracite-carrying canal that incorporated a series of water-driven inclined planes in its course across northern New Jersey in the United States. It was in use for about a century — from the late 1820s to the 1920s....		1831	Stanhope, New Jersey Stanhope, New Jersey -Transportation:Route 183 is the main access road that serves the borough. U.S. Route 206 also passes through in the western section and is partially a limited access road which connects to I-80 in neighboring Mount Olive.-Demographics:...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
82	1981	Borden Base Line Borden Base Line The Borden Base Line is a historic survey line running north/south through Hatfield and South Deerfield, Massachusetts. It was completed in 1831, and is now on the List of historic civil engineering landmarks....		1831	Hatfield Hatfield, Massachusetts Hatfield is a town in Hampshire County, Massachusetts, United States. The population was 3,249 at the 2000 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area....	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
83	1981	Chain of Rocks Water Purification Plant		1904	St. Louis	Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
84	1981	Charles River Basin Project Charles River Reservation The Charles River Reservation is a -long Massachusetts state park located along the banks of the Charles River in Boston, Cambridge, Watertown, and Newton. The park is managed by the Department of Conservation and Recreation . The portion of the Reservation between the Charles River Dam and the...		1910	Boston Boston Boston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
85	1981	Cortland Street Drawbridge Cortland Street Drawbridge The Cortland Street Drawbridge over the Chicago River is the original Chicago-style fixed-trunnion bascule bridge, designed by John Ericson and Edward Wilmann. When it opened in 1902 on the north side of Chicago, it was the first such bridge built in the United States...		1902	Chicago Chicago Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...	Illinois Illinois Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
86	1981	George Washington Bridge George Washington Bridge The George Washington Bridge is a suspension bridge spanning the Hudson River, connecting the Washington Heights neighborhood in the borough of Manhattan in New York City to Fort Lee, Bergen County, New Jersey. Interstate 95 and U.S. Route 1/9 cross the river via the bridge. U.S...		1931	Fort Lee Fort Lee, New Jersey Fort Lee is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough population was 35,345. Located atop the Hudson Palisades, the borough is the western terminus of the George Washington Bridge...  to New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...  & New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
87	1981	Louisville Water Works Louisville Water Tower The Water Tower of Louisville, Kentucky , is the oldest ornamental water tower in the world, having been built before the more famous Chicago Water Tower. Both the actual water tower and its pumping station are on the National Register of Historic Places...		1875 to 1896	Louisville Louisville, Kentucky Louisville is the largest city in the U.S. state of Kentucky, and the county seat of Jefferson County. Since 2003, the city's borders have been coterminous with those of the county because of a city-county merger. The city's population at the 2010 census was 741,096...	Kentucky Kentucky The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
88	1981	Montgomery Bell's Tunnel Montgomery Bell Tunnel The Montgomery Bell Tunnel, also known as the Patterson Forge Tunnel, in Cheatham County, Tennessee, is a long tunnel through limestone rock which was the first "full-scale" water diversion tunnel built in the United States. It is also apparently the first "full-scale" tunnel of any type in the...		1818	Cheatham County	Tennessee Tennessee Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
89	1981	Snoqualmie Falls Cavity Generating Station		1899	Snoqualmie Snoqualmie, Washington Snoqualmie is a city next to Snoqualmie Falls in King County, Washington. The city is home to the Northwest Railway Museum. The population was of 10,670 at the 2010 census...	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
90	1981	Union Station		1894	St. Louis St. Louis, Missouri St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...	Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
91	1981	Washington Monument Washington Monument The Washington Monument is an obelisk near the west end of the National Mall in Washington, D.C., built to commemorate the first U.S. president, General George Washington...		1885	Washington Washington, D.C. Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....	District of Columbia	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
92	1981	Whipple Truss Bridge		1855	Schenectady Schenectady, New York Schenectady is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2010 census, the city had a population of 66,135...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
93	1982	Carrollton Viaduct Carrollton Viaduct The Carrollton Viaduct, located over Gwynns Falls near Carroll Park in Baltimore, Maryland, is the first stone masonry bridge built for railroad use in the United States....		1829	Baltimore Baltimore Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore...	Maryland Maryland Maryland is a U.S. state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware to its east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
94	1982	Detroit-Windsor Tunnel		1930	Detroit	Michigan Michigan Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
95	1982	Eads South Pass Navigation Works		1879	Venice Venice, Louisiana Venice is an unincorporated community in Plaquemines Parish, Louisiana, United States. It is 130 km south of New Orleans on the west bank of the Mississippi River at . It is the last community down the Mississippi accessible by automobile, and is the southern terminus of the Great River Road...	Louisiana Louisiana Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
96	1982	Holland Tunnel Holland Tunnel The Holland Tunnel is a highway tunnel under the Hudson River connecting the island of Manhattan in New York City with Jersey City, New Jersey at Interstate 78 on the mainland. Unusual for an American public works project, it is not named for a government official, politician, or local hero or...		1927	Jersey City Jersey City, New Jersey Jersey City is the seat of Hudson County, New Jersey, United States.Part of the New York metropolitan area, Jersey City lies between the Hudson River and Upper New York Bay across from Lower Manhattan and the Hackensack River and Newark Bay...  to New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...  & New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
97	1982	John A. Roebling Suspension Bridge John A. Roebling Suspension Bridge The John A. Roebling Suspension Bridge spans the Ohio River between Cincinnati, Ohio and Covington, Kentucky. When the first pedestrians crossed on December 1, 1866, it was the longest suspension bridge in the world at 1,057 feet main span. Today, many pedestrians use the bridge to get between...		1866	Cincinnati	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
98	1982	Kinzua Railway Viaduct Kinzua Bridge The Kinzua Bridge or the Kinzua Viaduct was a railroad trestle that spanned Kinzua Creek in McKean County in the U.S. state of Pennsylvania...		1882	McKean County McKean County, Pennsylvania As of the census of 2000, there were 45,936 people, 18,024 households, and 12,094 families residing in the county. The population density was 47 people per square mile . There were 21,644 housing units at an average density of 22 per square mile...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
99	1982	Rogue River Bridge Isaac Lee Patterson Bridge The Isaac Lee Patterson Bridge, also known as the Rogue River Bridge and the Isaac Lee Patterson Memorial Bridge, is a concrete arch bridge that spans the Rogue River in Curry County, Oregon. The bridge carries U.S...		1931	Gold Beach Gold Beach, Oregon Gold Beach is a city in and the county seat of Curry County, Oregon, United States, on the Oregon Coast. The population was 1,897 at the 2000 census.-History:...	Oregon Oregon Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
100	1982	Second Street Bridge		1886	Allegan Allegan, Michigan Allegan is a city in the U.S. state of Michigan. As of the 2000 census, the city population was 4,838. It is the county seat of Allegan County. The city lies within Allegan Township, but is administratively autonomous....	Michigan Michigan Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
101	1982	Watertown Arsenal Watertown Arsenal The Watertown Arsenal was a major American arsenal located on the northern shore of the Charles River in Watertown, Massachusetts. Its site is now registered on the ASCE's List of Historic Civil Engineering Landmarks and on the U.S.'s National Register of Historic Places, and it is home to the...		1859	Watertown Watertown, Massachusetts The Town of Watertown is a city in Middlesex County, Massachusetts, United States. The population was 31,915 at the 2010 census.- History :Archeological evidence suggests that Watertown was inhabited for thousands of years before the arrival of settlers from England...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
102	1983	Atlantic City Convention Hall		1929	Atlantic City Atlantic City, New Jersey Atlantic City is a city in Atlantic County, New Jersey, United States, and a nationally renowned resort city for gambling, shopping and fine dining. The city also served as the inspiration for the American version of the board game Monopoly. Atlantic City is located on Absecon Island on the coast...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
103	1983	Bailey Island Bridge Bailey Island Bridge The Bailey Island Bridge is a historic bridge in the town of Harpswell within Cumberland County in the state of Maine.-History:...		1928	Harpswell Harpswell, Maine Harpswell is a town in Cumberland County, Maine, which is geographically within Casco Bay in the Gulf of Maine. The population was 5,239 at the 2000 census. Harpswell is composed of land contiguous with the rest of Cumberland County, called Harpswell Neck, as well as several large and small...	Maine Maine Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
104	1983	Blenheim Bridge		1855	North Blenheim North Blenheim, New York North Blenheim is a hamlet in the town of Blenheim, New York. It has the longest wooden, single-span covered bridge in the United States, the Old Blenheim Bridge. The "Blenheim Gilboa Power Project Visitors Center" is also located there.-External links:...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
105	1983	Iron Building of the U.S. Army Arsenal Iron Building (Watervliet Arsenal) The Iron Building is a historic building at the Watervliet Arsenal in Watervliet, New York. It currently serves as the Watervliet Arsenal Museum....		1859	Watervliet Watervliet, New York Watervliet is a city in Albany County in the US state of New York. The population was 10,254 as of the 2010 census. Watervliet is north of Albany, the capital of the state, and is bordered on the north, west, and south by the town of Colonie. The city is also known as "the Arsenal City".- History...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
106	1983	Ohio Canal System Ohio and Erie Canal The Ohio Canal or Ohio and Erie Canal was a canal constructed in the 1820s and early 1830s. It connected Akron, Summit County, with the Cuyahoga River near its mouth on Lake Erie in Cleveland, Cuyahoga County, and a few years later, with the Ohio River near Portsmouth, Scioto County, and then...		1848	Akron Akron, Ohio Akron , is the fifth largest city in the U.S. state of Ohio and the county seat of Summit County. It is located in the Great Lakes region approximately south of Lake Erie along the Little Cuyahoga River. As of the 2010 census, the city had a population of 199,110. The Akron Metropolitan...	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
107	1983	Peavey-Haglin Experimental Concrete Grain Elevator Peavey-Haglin Experimental Concrete Grain Elevator The Peavey–Haglin Experimental Concrete Grain Elevator, built in 1899–1900, was the first circular concrete grain elevator in the United States, and possibly in the world. It is notable for proving the viability of concrete in grain elevator construction. Previous grain elevators, being...		1900	St. Louis Park St. Louis Park, Minnesota As of the census of 2000, there were 44,126 people, 20,782 households, and 10,557 families residing in the city. The population density was 4,122.5 persons per square mile . There were 21,140 housing units at an average density of 1,975.0 per square mile...	Minnesota Minnesota Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
108	1983	Sault Ste. Marie Hydroelectric Complex		1902	Sault Ste. Marie Sault Ste. Marie, Michigan Sault Ste. Marie is a city in and the county seat of Chippewa County in the U.S. state of Michigan. It is in the north-eastern end of Michigan's Upper Peninsula, on the Canadian border, separated from its twin city of Sault Ste. Marie, Ontario, by the St. Marys River...	Michigan Michigan Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
109	1984	Columbia River Scenic Highway		1922	Portland Portland, Oregon Portland is a city located in the Pacific Northwest, near the confluence of the Willamette and Columbia rivers in the U.S. state of Oregon. As of the 2010 Census, it had a population of 583,776, making it the 29th most populous city in the United States...	Oregon Oregon Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
110	1984	Columbia-Wrightsville Bridge Columbia-Wrightsville Bridge The Columbia–Wrightsville Bridge, officially the Veterans Memorial Bridge, spanning the Susquehanna River between Columbia and Wrightsville, Pennsylvania, is commonly associated with the name “Columbia–Wrightsville Bridge,” although five other former and present-day bridges share this...		1930	Columbia Columbia, Pennsylvania Columbia, once colonial Wright's Ferry, is a borough in Lancaster County, Pennsylvania, 28 miles southeast of Harrisburg on the left bank Susquehanna River across from Wrightsville and York County. Originally, the area may have been called Conejohela Flats, for the many islands and islets in the...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
111	1984	Golden Gate Bridge Golden Gate Bridge The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the opening of the San Francisco Bay into the Pacific Ocean. As part of both U.S. Route 101 and California State Route 1, the structure links the city of San Francisco, on the northern tip of the San Francisco Peninsula, to...		1937	San Francisco	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
112	1984	Hoover Dam Hoover Dam Hoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the US states of Arizona and Nevada. It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President...		1935	Boulder City Boulder City, Nevada Boulder City is a city in Clark County, Nevada, United States. It is approximately from the City of Las Vegas. As of the 2010 census the population of Boulder City was 15,023.Boulder City is one of only two cities in Nevada that prohibit gambling....	Nevada Nevada Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...  & Arizona Arizona Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
113	1984	Lowell Waterpower System Lowell Power Canal System and Pawtucket Gatehouse Main Article History of Lowell, MassachusettsThe Lowell Power Canal System is the largest power canal system in the United States, at 5.6 miles in length. The system's estimated output is 10,000 horsepower, operating six major canals on two levels, controlled by numerous gates...		1821	Lowell Lowell, Massachusetts Lowell is a city in Middlesex County, Massachusetts, USA. According to the 2010 census, the city's population was 106,519. It is the fourth largest city in the state. Lowell and Cambridge are the county seats of Middlesex County...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
114	1984	Panama Canal Panama Canal The Panama Canal is a ship canal in Panama that joins the Atlantic Ocean and the Pacific Ocean and is a key conduit for international maritime trade. Built from 1904 to 1914, the canal has seen annual traffic rise from about 1,000 ships early on to 14,702 vessels measuring a total of 309.6...		1914			Panama Panama Panama , officially the Republic of Panama , is the southernmost country of Central America. Situated on the isthmus connecting North and South America, it is bordered by Costa Rica to the northwest, Colombia to the southeast, the Caribbean Sea to the north and the Pacific Ocean to the south. The...	water transportation
115	1984	Rocky River Pumped Storage Hydro-Plant		1925	New Milford New Milford, Connecticut New Milford is a town in southern Litchfield County, Connecticut, United States north of Danbury, on the Housatonic River. It is the largest town in the state in terms of land area at nearly . The population was 28,671 according to the Census Bureau's 2006 estimates...	Connecticut Connecticut Connecticut is a state in the New England region of the northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, and the state of New York to the west and the south .Connecticut is named for the Connecticut River, the major U.S. river that approximately...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
116	1985	Bayonne Bridge Bayonne Bridge The Bayonne Bridge is the fourth longest steel arch bridge in the world, and was the longest in the world at the time of its completion. It connects Bayonne, New Jersey with Staten Island, New York, spanning the Kill Van Kull. Despite popular belief, it is not a national landmark.The bridge was...		1931	Bayonne Bayonne, New Jersey Bayonne is a city in Hudson County, New Jersey, United States. Located in the Gateway Region, Bayonne is a peninsula that is situated between Newark Bay to the west, the Kill van Kull to the south, and New York Bay to the east...  to Staten Island Staten Island Staten Island is a borough of New York City, New York, United States, located in the southwest part of the city. Staten Island is separated from New Jersey by the Arthur Kill and the Kill Van Kull, and from the rest of New York by New York Bay...	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...  & New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
117	1985	Beginning Point of the U.S. Public Land Survey Beginning Point of the U.S. Public Land Survey The Beginning Point of the U.S. Public Land Survey is a monument at the border between the U.S. states of Ohio and Pennsylvania, on the north side of the Ohio River. It is near the three-way intersection of Ohio, Pennsylvania, and the northern tip of West Virginia, in both the Pittsburgh...		1785	Liverpool East Liverpool, Ohio As of the census of 2000, there were 13,089 people, 5,261 households, and 3,424 families residing in the city. The population density was 3,010.3 people per square mile . There were 5,743 housing units at an average density of 1,320.8 per square mile...	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
118	1985	Cape Cod Canal Cape Cod Canal The Cape Cod Canal is an artificial waterway traversing the narrow neck of land that joins Cape Cod to mainland Massachusetts.Part of the Atlantic Intracoastal Waterway, the canal is roughly 17.4 miles long and connects Cape Cod Bay in the north to Buzzards Bay in the south...		1914	Barnstable County Barnstable County, Massachusetts Barnstable County is a county located in the U.S. state of Massachusetts, consisting of Cape Cod and associated islands. As of the 2010 census, the population was 216,902...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
119	1985	Chesapeake and Delaware Canal Chesapeake and Delaware Canal The Chesapeake and Delaware Canal is a 14-mile long, 450-foot wide and 40-foot deep ship canal that cuts across the states of Maryland and Delaware, in the United States. It connects the waters of the Delaware River with those of the Chesapeake Bay and the Port of Baltimore...		1828 (rebuilt 1927)	New Castle New Castle, Delaware New Castle is a city in New Castle County, Delaware, six miles south of Wilmington, situated on the Delaware River. In 1900, 3,380 people lived here; in 1910, 3,351...	Delaware Delaware Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
120	1985	Davis Island Lock and Dam Davis Island (Pennsylvania) Davis Island is a small island located on the Ohio River in Stowe Township, just upstream of Neville Island near Pittsburgh, Pennsylvania, USA....		1885	Pittsburgh	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
121	1985	Forth Railway Bridge		1890			Scotland Scotland Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...	bridges
122	1985	Going-to-the-Sun Road Going-to-the-Sun Road Going-to-the-Sun Road is the only road through the heart of Glacier National Park in Montana, USA. It was completed in 1932, and it is the only road that crosses the park, going over the Continental Divide at Logan Pass. A fleet of 1930s red tour buses "jammers", rebuilt in 2001 to run on propane...		1932	Glacier National Park	Montana Montana Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
123	1985	High Bridge High Bridge of Kentucky (bridge) High Bridge is a currently used railroad bridge linking the steep palisades on either side of the Kentucky River between Jessamine County, Kentucky and Mercer County, Kentucky. Constructed in 1876, it is a three-span continuous under-deck truss used by Norfolk Southern Railway to carry trains...		1877	Jessamine County Jessamine County, Kentucky Jessamine County is a county located in the U.S. state of Kentucky. It is within the Inner Blue Grass region, which was the center of farming and blooded stock raising, including thoroughbred horses. It was formed in 1799. The population was 48,586 in the 2010 Census...	Kentucky Kentucky The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
124	1985	Statue of Liberty Statue of Liberty The Statue of Liberty is a colossal neoclassical sculpture on Liberty Island in New York Harbor, designed by Frédéric Bartholdi and dedicated on October 28, 1886...		1886	New York Harbor New York Harbor New York Harbor refers to the waterways of the estuary near the mouth of the Hudson River that empty into New York Bay. It is one of the largest natural harbors in the world. Although the U.S. Board of Geographic Names does not use the term, New York Harbor has important historical, governmental,...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
125	1986	White River Concrete Arch Bridge Cotter Bridge The Cotter Bridge, also known as the R.M. Ruthven Bridge and the White River Concrete Arch Bridge, carries the business route of U.S. Route 62 across the White River west of the city of Cotter in Baxter County, Arkansas, USA. Upon completion, the bridge allowed access to a part of The Ozarks...		1930	Cotter Cotter, Arkansas Cotter is a city in Baxter County, Arkansas, United States. The population was 970 at the 2010 census.-History:Originally, the river bend was known as Lake's Ferry. In 1905, the Missouri Pacific Railroad bought the area and sold over one thousand lots, mostly to railroad employees. The city was...	Arkansas Arkansas Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
126	1986	Cranetown Triangulation Site		1817	Cedar Grove Cedar Grove, New Jersey -Climate:Cedar Grove has a humid subtropical climate, with warm/hot humid summers and cool/cold winters. The climate is slightly colder overall during the summer than in New York City because there is no urban heat island effect....	New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
127	1986	Eiffel Tower Eiffel Tower The Eiffel Tower is a puddle iron lattice tower located on the Champ de Mars in Paris. Built in 1889, it has become both a global icon of France and one of the most recognizable structures in the world...		1889	Paris Paris Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...	Île-de-France Île-de-France (région) Île-de-France is the wealthiest and most populated of the twenty-two administrative regions of France, composed mostly of the Paris metropolitan area....	France France The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...	buildings
128	1986	El Camino Real		1598-1800s	Santa Fe Santa Fe, New Mexico Santa Fe is the capital of the U.S. state of New Mexico. It is the fourth-largest city in the state and is the seat of . Santa Fe had a population of 67,947 in the 2010 census...  and Mexico City Mexico City Mexico City is the Federal District , capital of Mexico and seat of the federal powers of the Mexican Union. It is a federal entity within Mexico which is not part of any one of the 31 Mexican states but belongs to the federation as a whole...	New Mexico New Mexico New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...  and Mexico Mexico The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...	roads & rails
129	1986	El Camino Real (The Royal Road) Eastern Branch Old San Antonio Road The Old San Antonio Road was a historic roadway located in the U.S. states of Texas and Louisiana. Parts of it were based on traditional Native American trails. Its Texas terminus was about southeast of Eagle Pass at the Rio Grande in Maverick County, and its northern terminus was at...		from 16th century	San Antonio	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
130	1986	New Castle Ice Harbor		1974	New Castle New Castle, Delaware New Castle is a city in New Castle County, Delaware, six miles south of Wilmington, situated on the Delaware River. In 1900, 3,380 people lived here; in 1910, 3,351...	Delaware Delaware Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
131	1986	Norris Dam Norris Dam Norris Dam is a hydroelectric and flood control structure located on the Clinch River in Anderson County and Campbell County, Tennessee, USA. Its construction in the mid-1930s was the first major project for the Tennessee Valley Authority, which had been created in 1933 to bring economic...		1936	Knoxville Knoxville, Tennessee Founded in 1786, Knoxville is the third-largest city in the U.S. state of Tennessee, U.S.A., behind Memphis and Nashville, and is the county seat of Knox County. It is the largest city in East Tennessee, and the second-largest city in the Appalachia region...	Tennessee Tennessee Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
132	1986	San Francisco – Oakland Bay Bridge		1937	San Francisco to Oakland Oakland, California Oakland is a major West Coast port city on San Francisco Bay in the U.S. state of California. It is the eighth-largest city in the state with a 2010 population of 390,724...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
133	1986	Sewall's Bridge		1761 (rebuilt 1934)	York York, Maine York is a town in York County, Maine, United States at the southwest corner of the state. The population in the 2000 census was 12,854. Situated beside the Atlantic Ocean on the Gulf of Maine, York is a well-known summer resort. It is home to three 18-hole golf clubs, three sandy beaches, and...	Maine Maine Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
134	1986	Triborough Bridge Project Triborough Bridge The Robert F. Kennedy ' Bridge, formerly known as the Triborough Bridge , is a complex of three separate bridges in New York City, United States...		1936	New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
135	1986	U.S. Army Corps of Engineers Waterways Exp. Station		1929	Vicksburg Vicksburg, Mississippi Vicksburg is a city in Warren County, Mississippi, United States. It is the only city in Warren County. It is located northwest of New Orleans on the Mississippi and Yazoo rivers, and due west of Jackson, the state capital. In 1900, 14,834 people lived in Vicksburg; in 1910, 20,814; in 1920,...	Mississippi Mississippi Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
136	1986	U.S. Capitol United States Capitol The United States Capitol is the meeting place of the United States Congress, the legislature of the federal government of the United States. Located in Washington, D.C., it sits atop Capitol Hill at the eastern end of the National Mall...		1793, rebuilt 1863	Washington Washington, D.C. Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....	District of Columbia	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
137	1986	Zuiderzee Enclosure Dam Zuiderzee Works The Zuiderzee Works are a manmade system of dams, land reclamation and water drainage works, the largest hydraulic engineering project undertaken by the Netherlands during the twentieth century. The project involved the damming of the Zuiderzee, a large, shallow inlet of the North Sea, and the...		1927 to 1932	Zaandam Zaandam Zaandam is a town in the Netherlands, in the province of North Holland. It is the main city of the municipality of Zaanstad, and received city rights in 1811...	North Holland North Holland North Holland |West Frisian]]: Noard-Holland) is a province situated on the North Sea in the northwest part of the Netherlands. The provincial capital is Haarlem and its largest city is Amsterdam.-Geography:...	Netherlands Netherlands The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...	water supply & control
138	1987	Allegheny Portage Railroad Allegheny Portage Railroad The Allegheny Portage Railroad was the first railroad constructed through the Allegheny Mountains in central Pennsylvania, United States. It was a series of 10 inclines, approximately long, and operated from 1834 to 1854...		1834	Hollidaysburg Hollidaysburg, Pennsylvania Hollidaysburg is a borough in Blair County, Pennsylvania, on the Juniata River, south of Altoona. It is the county seat of Blair County. It is part of the Altoona, Pennsylvania, Metropolitan Statistical Area and is one of the communities that comprises the Altoona Urban Area...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
139	1987	Bonneville Dam, Columbia River System Bonneville Dam Bonneville Lock and Dam consists of several run-of-the-river dam structures that together complete a span of the Columbia River between the U.S. states of Oregon and Washington at River Mile 146.1. The dam is located east of Portland, Oregon, in the Columbia River Gorge. The primary functions of...		1937	Bonneville Bonneville, Oregon Bonneville is an unincorporated community in Multnomah County, Oregon, United States, on Interstate 84 and the Columbia River. Bonneville is best known as the site of Bonneville Dam...	Oregon Oregon Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
140	1987	Bridges of Keeseville Bridges of Keeseville The Bridges of Keeseville consist of three historic bridges located in Keeseville, New York, spanning the Ausable River. These bridges include a stone arch bridge constructed in 1843, a wrought iron Pratt truss bridge and a twisted wire cable suspension footbridge built in 1888...		1843, 1878, 1888	Keeseville Keeseville, New York Keeseville is a village in both Clinton County, New York and in Essex County, New York in the United States. The population was 1,815 at the 2010 census. The village is named after the Keese family....	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
141	1987	Dismal Swamp Canal Dismal Swamp Canal The Dismal Swamp Canal is located along the eastern edge of the Great Dismal Swamp in Virginia and North Carolina in the United States. It is the oldest continually operating man-made canal in the United States, opened in 1805...		1805	Chesapeake Chesapeake, Virginia As of the census of 2000, there were 199,184 people, 69,900 households, and 54,172 families residing in the city. The population density was 584.6 people per square mile . There were 72,672 housing units at an average density of 213.3 per square mile...	Virginia Virginia The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
142	1987	Houston Ship Channel Houston Ship Channel The Houston Ship Channel, located in Houston, Texas, is part of the Port of Houston—one of the United States's busiest seaports. The channel is the conduit for ocean-going vessels between the Houston-area shipyards and the Gulf of Mexico.-Overview:...		1837–present	Houston	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
143	1987	Kamehameha V Post Office Kamehameha V Post Office Kamehameha V Post Office at the corner of Merchant and Bethel Streets in Honolulu, Hawaii was the first building in the Hawaiian Islands to be constructed entirely of precast concrete blocks reinforced with iron bars. It was built by J.G. Osborne in 1871 and the success of this new method was...		1871	Honolulu	Hawaii Hawaii Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
144	1987	Frisco Bridge Frisco Bridge The Frisco Bridge, previously known as the Memphis Bridge, is a cantilevered through truss bridge carrying a rail line across the Mississippi River between West Memphis, Arkansas and Memphis, Tennessee.-Construction:...		1892	Memphis Memphis, Tennessee Memphis is a city in the southwestern corner of the U.S. state of Tennessee, and the county seat of Shelby County. The city is located on the 4th Chickasaw Bluff, south of the confluence of the Wolf and Mississippi rivers....	Tennessee Tennessee Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...  & Arkansas Arkansas Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
145	1987	Quebec Bridge Quebec Bridge right|thumb|Lifting the centre span in place was considered to be a major engineering achievement. Photo caption from [[Popular Mechanics]] Magazine, December 1917...		1917	Quebec City Quebec City Quebec , also Québec, Quebec City or Québec City is the capital of the Canadian province of Quebec and is located within the Capitale-Nationale region. It is the second most populous city in Quebec after Montreal, which is about to the southwest...	Quebec Quebec Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....	Canada Canada Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...	bridges
146	1988	Belle Fourche Dam		1911	Belle Fourche Belle Fourche, South Dakota According to the United States Census Bureau, the city has a total area of , of which are land and is water.-Demographics:As of the census of 2000, there were 4,565 people, 1,854 households, and 1,186 families residing in the city. The population density was 1,446.9 people per square mile...	South Dakota South Dakota South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. Once a part of Dakota Territory, South Dakota became a state on November 2, 1889. The state has an area of and an estimated population of just over...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
147	1988	École Nationale des Ponts et Chaussées École Nationale des Ponts et Chaussées Founded in 1747, the École nationale des ponts et chaussées , often referred to as les Ponts, is the world's oldest civil engineering school...		1747	Paris Paris Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...	Île-de-France Île-de-France (région) Île-de-France is the wealthiest and most populated of the twenty-two administrative regions of France, composed mostly of the Paris metropolitan area....	France France The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...	buildings
148	1988	Keokuk Hydro-Power System		1913	Keokuk Keokuk, Iowa Keokuk is a city in the southeastern part of the U.S. state of Iowa and one of the county seats of Lee County. The other county seat is Fort Madison. The population was 11,427 at the 2000 census. The city is named after the Sauk Chief Keokuk, who is thought to be buried in Rand Park...	Iowa Iowa Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
149	1988	Pennsylvania Turnpike Pennsylvania Turnpike The Pennsylvania Turnpike is a toll highway system operated by the Pennsylvania Turnpike Commission in the Commonwealth of Pennsylvania, United States. The three sections of the turnpike system total . The main section extends from Ohio to New Jersey and is long...		1940		Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
150	1988	River des Peres Sewerage & Drainage Works River des Peres The River des Peres is a metropolitan river in St. Louis, Missouri. It is the backbone of sanitary and stormwater systems in the city of St. Louis and portions of St. Louis County...		1924 to 1931	St. Louis St. Louis, Missouri St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...	Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
151	1988	Sydney Harbour Bridge Sydney Harbour Bridge The Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail, vehicular, bicycle and pedestrian traffic between the Sydney central business district and the North Shore. The dramatic view of the bridge, the harbour, and the nearby Sydney Opera House is an iconic...		1932	Sydney Sydney Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...	New South Wales New South Wales New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...	Australia Australia Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...	bridges
152	1989	Royal Colonial Boundary of 1665 Royal Colonial Boundary of 1665 The Royal Colonial Boundary of 1665 is a historic civil engineering landmark, as designated by the American Society of Civil Engineers. It was a brainchild of King Charles II of Great Britain & Ireland to mark the boundaries of various English North American colonies...		1728–1819	Middlesboro	Kentucky Kentucky The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
153	1989	Zhaozhou Bridge Zhaozhou Bridge The Anji Bridge is the world's oldest open-spandrel stone segmental arch bridge. Credited to the design of a craftsman named Li Chun, the bridge was constructed in the years 595-605 during the Sui Dynasty...		605 AD	Zhaoxian Zhao County Zhao County , a historic town called Zhaozhou in the past, is located in Hebei 40 km southeast of the provincial capital Shijiazhuang, and 280 km south of Beijing. Its total land area is 675 km² and total population is around 550,000...	Hebei Hebei ' is a province of the People's Republic of China in the North China region. Its one-character abbreviation is "" , named after Ji Province, a Han Dynasty province that included what is now southern Hebei...	China China Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...	bridges
154	1990	Fort Peck Dam Fort Peck Dam The Fort Peck Dam is the highest of six major dams along the Missouri River, located in northeast Montana in the United States, near Glasgow, and adjacent to the community of Fort Peck...		1940	Fort Peck Fort Peck, Montana Fort Peck is a town in Valley County, Montana, United States. The population was 240 at the 2000 census.-History:The name Fort Peck is associated with Col. Campbell K. Peck, the partner of Elias H. Durfee in the Leavenworth, Kansas, trading firm of Durfee and Peck...	Montana Montana Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
155	1990	Maria Pia Bridge Maria Pia Bridge The Maria Pia bridge , commonly known as Ponte Dona Maria, is a railway bridge built in 1877 by Gustave Eiffel in Porto, Portugal...		1877	Oporto Porto Porto , also known as Oporto in English, is the second largest city in Portugal and one of the major urban areas in the Iberian Peninsula. Its administrative limits include a population of 237,559 inhabitants distributed within 15 civil parishes...	Norte	Portugal Portugal Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...	bridges
156	1990	Salginatobel Bridge Salginatobel Bridge Salginatobel Bridge is a reinforced concrete arch bridge designed by renowned Swiss civil engineer Robert Maillart. It was constructed across an alpine valley in Schiers, Switzerland between 1929 and 1930...		1930	Grisons Graubünden Graubünden or Grisons is the largest and easternmost canton of Switzerland. The canton shares borders with the cantons of Ticino, Uri, Glarus and St. Gallen and international borders with Italy, Austria and Liechtenstein...	Graubünden Graubünden Graubünden or Grisons is the largest and easternmost canton of Switzerland. The canton shares borders with the cantons of Ticino, Uri, Glarus and St. Gallen and international borders with Italy, Austria and Liechtenstein...	Switzerland Switzerland Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....	bridges
157	1991	Eddystone Lighthouse Eddystone Lighthouse Eddystone Lighthouse is on the treacherous Eddystone Rocks, south west of Rame Head, United Kingdom. While Rame Head is in Cornwall, the rocks are in Devon and composed of Precambrian Gneiss....		1882	off Plymouth Plymouth Plymouth is a city and unitary authority area on the coast of Devon, England, about south-west of London. It is built between the mouths of the rivers Plym to the east and Tamar to the west, where they join Plymouth Sound...		England England England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...	water transportation
158	1991	Fritz Engineering Laboratory Lehigh University Lehigh University is a private, co-educational university located in Bethlehem, Pennsylvania, in the Lehigh Valley region of the United States. It was established in 1865 by Asa Packer as a four-year technical school, but has grown to include studies in a wide variety of disciplines...		1910	Bethlehem Bethlehem, Pennsylvania Bethlehem is a city in Lehigh and Northampton Counties in the Lehigh Valley region of eastern Pennsylvania, in the United States. As of the 2010 census, the city had a total population of 74,982, making it the seventh largest city in Pennsylvania, after Philadelphia, Pittsburgh, Allentown, Erie,...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
159	1991	St. Clair Tunnel St. Clair Tunnel The St. Clair Tunnel is the name for two separate rail tunnels which were built under the St. Clair River between Sarnia, Ontario and Port Huron, Michigan. It was the first full-size subaqueous tunnel built in North America. -First tunnel :The St. Clair Tunnel Company opened the first tunnel in...		1891	Port Huron Port Huron, Michigan Port Huron is a city in the U.S. state of Michigan and the county seat of St. Clair County. The population was 30,184 at the 2010 census. The city is adjacent to Port Huron Township but is administratively autonomous. It is joined by the Blue Water Bridge over the St. Clair River to Sarnia,...	Michigan Michigan Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
160	1991	Thames Tunnel Thames Tunnel The Thames Tunnel is an underwater tunnel, built beneath the River Thames in London, United Kingdom, connecting Rotherhithe and Wapping. It measures 35 feet wide by 20 feet high and is 1,300 feet long, running at a depth of 75 feet below the river's surface...		1843	London London London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...		England England England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...	tunnels
161	1992	Acquedotto Traiano-Paolo		110 AD	Rome Rome Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...	Lazio	Italy Italy Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...	water supply & control
162	1992	Bridges of Niagara		1849, 1855, 1883, 1898, 1941	Niagara Gorge Niagara Gorge Niagara Gorge is a gorge carved by the Niagara River along the US-Canadian border in New York and Ontario. As Niagara Falls recedes upstream toward Lake Erie, the river has gouged the hard dolomitic limestone of the Niagara escarpment to form the gorge...	Ontario Ontario Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....  and New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	Canada Canada Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...  and United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
163	1992	Duck Creek Aqueduct		1846	Metamora Metamora, Indiana Metamora is an unincorporated town in Metamora Township, Franklin County, Indiana. The town was once a stop along the Whitewater Canal and is now primarily dependent on tourism.-Geography:Metamora is located at .Metamora was platted in 1838...	Indiana Indiana Indiana is a US state, admitted to the United States as the 19th on December 11, 1816. It is located in the Midwestern United States and Great Lakes Region. With 6,483,802 residents, the state is ranked 15th in population and 16th in population density. Indiana is ranked 38th in land area and is...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
164	1992	Hohokam Hohokam Hohokam is one of the four major prehistoric archaeological Oasisamerica traditions of what is now the American Southwest. Many local residents put the accent on the first syllable . Variant spellings in current, official usage include Hobokam, Huhugam and Huhukam...  Canal System		600 - 1450 AD		Arizona Arizona Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
165	1992	San Jacinto Monument San Jacinto Monument The San Jacinto Monument is a high column located on the Houston Ship Channel in unincorporated Harris County, Texas near the city of La Porte. The monument is topped with a 220-ton star that commemorates the site of the Battle of San Jacinto, the decisive battle of the Texas Revolution...		1939	Houston	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
166	1993	Blimp Hangars Marine Corps Air Station Tustin Tustin Legacy is a planned community in Tustin, California being developed on the former Marine Corps Air Station Tustin. The project, under construction, will include parks, a commercial retail center and various densities of housing, for a total of 4,600 units.The City’s vision for Tustin Legacy...		1943	Tustin Tustin, California -Top employers:According to the City's 2010 Comprehensive Annual Financial Report, the top employers in the city are:-2010:The 2010 United States Census reported that Tustin had a population of 75,540. The population density was 6,816.7 people per square mile...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	aviation
167	1993	Denison Dam Denison Dam Denison Dam, also known as Lake Texoma Dam, is a dam located on the Red River between Texas and Oklahoma that impounds Lake Texoma. The purpose of the dam is flood control, water supply, hydroelectric power production, river regulation, navigation and recreation.-History:Completed in 1943 primarily...		1943	Denison Denison, Texas Denison is a city in Grayson County, Texas, United States. The population was 22,773 at the 2000 census; it is estimated to have grown to 24,127 in 2009. Denison is one of two principal cities in the Sherman-Denison Metropolitan Statistical Area.-History:...	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
168	1993	Hanford B Reactor		1944	Richland Richland, Washington Richland is a city in Benton County in the southeastern part of the U.S. state of Washington, at the confluence of the Yakima and the Columbia Rivers. As of the 2010 census, the city population was 48,058. April 1, 2011 estimates from the Washington State Office of Financial Management put the...	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	power generation
169	1993	Stevens Pass Railroad Tunnels Cascade Tunnel The Cascade Tunnel refers to two tunnels at Stevens Pass through the Cascade Mountains, approximately to the east of Everett, Washington. The first Cascade Tunnel was a 2.63-mile long single track railroad, built by the Great Northern Railway in 1900 to avoid problems caused by heavy winter...  & Switchback System		1900	Stevens Pass Stevens Pass Stevens Pass is a mountain pass through the Cascade Mountains located at the border of King County and Chelan County in Washington, United States....	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
170	1994	Colorado River Aqueduct Colorado River Aqueduct The Colorado River Aqueduct, or CRA, is a water conveyance in Southern California in the United States, operated by the Metropolitan Water District of Southern California . The aqueduct impounds water from the Colorado River at Lake Havasu on the California-Arizona border west across the Mojave...		1933–1941	Blythe Blythe, California Blythe is a city in Riverside County, California, United States, in the "Palo Verde Valley" of the Lower Colorado River Valley region, an agricultural area and part of the Colorado Desert along the Colorado River. Blythe was named after Thomas Blythe, a gold prospector who established primary...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
171	1994	Kavanagh Building Kavanagh building The Kavanagh Building is an Art Deco skyscraper in Buenos Aires, located at 1065 Florida St. in the barrio of Retiro, overlooking Plaza San Martín. It was designed in 1934 by local architects Gregorio Sánchez, Ernesto Lagos and Luis María de la Torre, and was inaugurated in 1936...		1936	Buenos Aires Buenos Aires Buenos Aires is the capital and largest city of Argentina, and the second-largest metropolitan area in South America, after São Paulo. It is located on the western shore of the estuary of the Río de la Plata, on the southeastern coast of the South American continent...		Argentina Argentina Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...	buildings
172	1994	Missouri River Bridges		1926	Chamberlain Chamberlain, South Dakota Chamberlain is a city in Brule County, South Dakota, United States. The population was 2,387 at the 2010 census. It is the county seat of Brule County. Chamberlain is home to the Akta Lakota Museum and Cultural Center, which profiles the lives of nomadic Plains Indians...	South Dakota South Dakota South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. Once a part of Dakota Territory, South Dakota became a state on November 2, 1889. The state has an area of and an estimated population of just over...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
173	1994	Red Hill Underground Fuel Storage Facility Red Hill Underground Fuel Storage Facility The Red Hill Underground Fuel Storage Facility is a fuel storage facility located near Pearl Harbor and operated by the United States Navy.The Red Hill facility is unique in that the 20 vertical cylindrical tanks, each measuring 77 m tall by 30 m in diameter, are hollowed out of volcanic rock, 30...		1943	Honolulu	Hawaii Hawaii Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	tunnels
174	1994	Viaducto del Malleco		1890	Malleco River Malleco River Malleco River is a river in Malleco Province, Araucanía Region, southern Chile. It rises in the western slopes of the Andes, within the Tolhuaca National Park and near Tolhuaca Volcano. The river is a major tributary to the Bío-Bío River. The Malleco Viaduct built in 1890 is the main landmark of...	Central Chile	Chile Chile Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...	bridges
175	1994	White Pass and Yukon Route White Pass and Yukon Route The White Pass and Yukon Route is a Canadian and U.S. Class II narrow gauge railroad linking the port of Skagway, Alaska, with Whitehorse, the capital of Yukon. An isolated system, it has no direct connection to any other railroad. Equipment, freight and passengers are ferried by ship through the...		1900	Whitehorse, Yukon Whitehorse, Yukon Whitehorse is Yukon's capital and largest city . It was incorporated in 1950 and is located at kilometre 1476 on the Alaska Highway in southern Yukon. Whitehorse's downtown and Riverdale areas occupy both shores of the Yukon River, which originates in British Columbia and meets the Bering Sea in...  to Skagway, Alaska Skagway, Alaska Skagway is a first-class borough in Alaska, on the Alaska Panhandle. It was formerly a city first incorporated in 1900 that was re-incorporated as a borough on June 25, 2007. As of the 2000 census, the population of the city was 862...	Yukon Territory to Alaska Alaska Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...	Canada Canada Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...  & United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
176	1995	Alaska Highway Alaska Highway The Alaska Highway was constructed during World War II for the purpose of connecting the contiguous U.S. to Alaska through Canada. It begins at the junction with several Canadian highways in Dawson Creek, British Columbia and runs to Delta Junction, Alaska, via Whitehorse, Yukon...		1942	Dawson Creek to Delta Junction Delta Junction, Alaska Delta Junction is a city in the Southeast Fairbanks Census Area, Alaska, United States. According to 2005 Census Bureau estimates, the population of the city is 897. The city is located a short distance south of the confluence of the Delta River with the Tanana River, which is at Big Delta...	British Columbia British Columbia British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...  to Alaska Alaska Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...	Canada Canada Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...  & United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
177	1995	Banaue Rice Terraces Banaue Rice Terraces The Banaue Rice Terraces also called Payew, are 2000-year old terraces that were carved into the mountains of Ifugao in the Philippines by ancestors of the indigenous people. The Rice Terraces are commonly referred to by Filipinos as the "Eighth Wonder of the World". It is commonly thought that...		100 BC	Banaue Banaue, Ifugao Banaue is a 4th class municipality in the province of Ifugao, Philippines. According to the latest census, it has a population of 21,448 people in 3,952 households...	Ifugao	Philippines Philippines The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...	water supply & control
178	1995	Queretaro Aqueduct		1738	Querétaro Querétaro Querétaro officially Estado Libre y Soberano de Querétaro de Arteaga is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided into 18 municipalities and its capital city is Santiago de Querétaro....		Mexico Mexico The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...	water supply & control
179	1995	Victoria Falls Bridge Victoria Falls Bridge The Victoria Falls Bridge crosses the Zambezi River just below the Victoria Falls and is built over the Second Gorge of the falls. As the river is the border between Zimbabwe and Zambia, the bridge links the two countries and has border posts on the approaches to both ends, at the towns of Victoria...		1905	Zambezi River		Zimbabwe Zimbabwe Zimbabwe is a landlocked country located in the southern part of the African continent, between the Zambezi and Limpopo rivers. It is bordered by South Africa to the south, Botswana to the southwest, Zambia and a tip of Namibia to the northwest and Mozambique to the east. Zimbabwe has three...  & Zambia Zambia Zambia , officially the Republic of Zambia, is a landlocked country in Southern Africa. The neighbouring countries are the Democratic Republic of the Congo to the north, Tanzania to the north-east, Malawi to the east, Mozambique, Zimbabwe, Botswana and Namibia to the south, and Angola to the west....	bridges
180	1996	Armour-Swift-Burlington Bridge ASB Bridge The Armour-Swift-Burlington Bridge, also known as the North Kansas City Bridge, is a rail crossing over the Missouri River in Kansas City, Missouri that formerly also handled car traffic....		1912	Kansas City Kansas City, Missouri Kansas City, Missouri is the largest city in the U.S. state of Missouri and is the anchor city of the Kansas City Metropolitan Area, the second largest metropolitan area in Missouri. It encompasses in parts of Jackson, Clay, Cass, and Platte counties...	Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
181	1996	Dublin-Belfast railway line Dublin-Belfast railway line The Dublin-Belfast main line is a major railway route in Ireland that connects Dublin Connolly station in the Republic of Ireland and Belfast Central station in Northern Ireland.-History:The railway line was built by three separate companies...		1839	Dublin to Belfast Belfast Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...		Ireland Ireland Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...  & Northern Ireland Northern Ireland Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...	roads & rails
182	1996	Kentucky Dam Kentucky Dam Kentucky Dam is a hydroelectric dam on the Tennessee River on the county line between Livingston County and Marshall County in the U.S. state of Kentucky...		1944	Gilbertsville Gilbertsville, Kentucky Gilbertsville is an unincorporated community in Marshall County, Kentucky, United States. Its elevation is 351 feet , and it is located at . It is known as the closest village to Kentucky Dam...	Kentucky Kentucky The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
183	1996	Lake Moeris Quarry Road		2575-2137 BC	Lake Moeris Lake Moeris Lake Moeris is an ancient lake in the northwest of the Faiyum Oasis, southwest of Cairo, Egypt. It persists in modern times as a smaller lake called Birket Qarun. The lake's surface is 140 ft below sea-level, and covers about ....		Egypt Egypt Egypt , officially the Arab Republic of Egypt, Arabic: , is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world...	roads & rails
184	1996	City Plan of Philadelphia		1682	Philadelphia	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
185	1996	San Antonio River Walk & Flood Control System San Antonio River Walk The San Antonio River Walk is a network of walkways along the banks of the San Antonio River, one story beneath downtown San Antonio, Texas...		1929 to 1941	San Antonio	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water control & supply
186	1997	Grand Coulee Dam Grand Coulee Dam Grand Coulee Dam is a gravity dam on the Columbia River in the U.S. state of Washington built to produce hydroelectric power and provide irrigation. It was constructed between 1933 and 1942, originally with two power plants. A third power station was completed in 1974 to increase its energy...		1941	Grand Coulee Grand Coulee, Washington Grand Coulee is a city in Grant County, Washington, United States. The population was 897 at the 2000 census.-History:Grand Coulee was officially incorporated on November 6, 1935...	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
187	1997	Lake Washington Ship Canal & Hiram M. Chittenden Locks Hiram M. Chittenden Locks The Hiram M. Chittenden Locks are a complex of locks that sit at the west end of Salmon Bay, part of Seattle's Lake Washington Ship Canal. They are known locally as the Ballard Locks after the neighborhood to their north...		1917	Seattle	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
188	1997	Navajo Bridge Navajo Bridge Navajo Bridge crosses the Colorado River's Marble Canyon near Lee's Ferry in the US state of Arizona. Apart from the Glen Canyon Bridge a few miles upstream at Page, Arizona, it is the only roadway crossing of the river and the Grand Canyon for nearly...		1929	Page Page, Arizona Page is a city in Coconino County, Arizona, United States, near the Glen Canyon Dam and Lake Powell. According to 2005 Census Bureau estimates, the population of the city is 6,794.-Geography:Page is located at ....	Arizona Arizona Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
189	1997	North Island Main Trunk Railway		1885–1908	Auckland Auckland The Auckland metropolitan area , in the North Island of New Zealand, is the largest and most populous urban area in the country with residents, percent of the country's population. Auckland also has the largest Polynesian population of any city in the world...  to Wellington Wellington Wellington is the capital city and third most populous urban area of New Zealand, although it is likely to have surpassed Christchurch due to the exodus following the Canterbury Earthquake. It is at the southwestern tip of the North Island, between Cook Strait and the Rimutaka Range...	North Island North Island The North Island is one of the two main islands of New Zealand, separated from the much less populous South Island by Cook Strait. The island is in area, making it the world's 14th-largest island...	New Zealand New Zealand New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...	roads & rails
190	1997	Northampton Street Bridge Northampton Street Bridge The Northampton Street Bridge is a bridge connecting Easton, PA and Phillipsburg, NJ that crosses the Delaware River. It is maintained by the Delaware River Joint Toll Bridge Commission despite not being a toll bridge. It is known locally as the "Free Bridge" thus distinguishing it from the...		1896	Easton Easton, Pennsylvania Easton is a city in Northampton County, Pennsylvania, United States. The population was 26,800 as of the 2010 census. It is the county seat of Northampton County....  to Phillipsburg Phillipsburg, New Jersey Phillipsburg, known locally as P'burg, is a town in Warren County, New Jersey, in the United States. As of 2010 United States Census, the town's population was 14,950....	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...  & New Jersey New Jersey New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
191	1997	Snowy Mountains Scheme Snowy Mountains Scheme The Snowy Mountains scheme is a hydroelectricity and irrigation complex in south-east Australia. It consists of sixteen major dams; seven power stations; a pumping station; and 225 kilometres of tunnels, pipelines and aqueducts and was constructed between 1949 and 1974. The Chief engineer was Sir...		1974	Snowy Mountains Snowy Mountains The Snowy Mountains, known informally as "The Snowies", are the highest Australian mountain range and contain the Australian mainland's highest mountain, Mount Kosciuszko, which reaches 2,228 metres AHD, approximately 7310 feet....	New South Wales New South Wales New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...	Australia Australia Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...	power generation
192	1997	Texas Commerce Bank Building (formerly Gulf, now Chase)		1929	Houston	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
193	1997	Walnut Street Bridge		1890	Harrisburg Harrisburg, Pennsylvania Harrisburg is the capital of Pennsylvania. As of the 2010 census, the city had a population of 49,528, making it the ninth largest city in Pennsylvania...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
194	1998	Brooks AFB, Old Hangar 9 Brooks City-Base Brooks City-Base was a United States Air Force facility located in San Antonio, Texas, southeast of Downtown San Antonio.In 2002 Brooks Air Force Base was renamed Brooks City-Base when the property was conveyed to the Brooks Development Authority as part of a unique project between local, state,...		1918	San Antonio	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	aviation
195	1998	Canton Viaduct Canton Viaduct Canton Viaduct is the oldest blind arcade cavity wall bridge in the world and it was the longest and tallest railroad bridge ever built when it was completed in 1835. It is the last surviving bridge of its kind and has been in continuous service for years; it now carries high-speed passenger and...		1835	Canton Canton, Massachusetts Canton is a town in Norfolk County, Massachusetts, United States. The population was 21,561 at the 2010 census. Canton is part of Greater Boston, about 15 miles southwest of downtown Boston.- History :...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridge Bridge A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle... s
196	1998	Göta Canal Göta Canal The Göta Canal is a Swedish canal constructed in the early 19th century. It formed the backbone of a waterway stretching some 382 miles , linking a number of lakes and rivers to provide a route from Gothenburg on the west coast to Söderköping on the Baltic Sea via the river Göta älv and the...		1810 to 1832	Gothenburg Gothenburg Gothenburg is the second-largest city in Sweden and the fifth-largest in the Nordic countries. Situated on the west coast of Sweden, the city proper has a population of 519,399, with 549,839 in the urban area and total of 937,015 inhabitants in the metropolitan area...	Västra Götaland Västra Götaland County Västra Götaland County is a county or län on the western coast of Sweden.The county is the second largest of Sweden's counties and it is subdivided into 49 municipalities . Its population of 1,550,000 amounts to 17% of Sweden's population...	Sweden Sweden Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....	water transportation
197	1998	Moseley Wrought Iron Arch Bridge Moseley Wrought Iron Arch Bridge The Moseley Wrought Iron Arch Bridge, also known as the Upper Pacific Mills Bridge, is a historic, riveted, wrought iron bridge now located in North Andover, Massachusetts...		1864	North Andover North Andover, Massachusetts North Andover is a town in Essex County, Massachusetts, United States. North Andover is the home of Merrimack College, a private, Catholic four-year institution ....	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
198	1998	Tehachapi Pass Railroad Line Tehachapi Loop The Tehachapi Loop is a long 'spiral', or helix, on The Union Pacific Railroad through Tehachapi Pass, in south central California. The railroad line connects Bakersfield in the San Joaquin Valley to Mojave in the Antelope Valley. The loop takes its name from the circuitous route it takes, in...		1876	Kern County Kern County, California Spreading across the southern end of the California Central Valley, Kern County is the fifth-largest county by population in California. Its economy is heavily linked to agriculture and to petroleum extraction, and there is a strong aviation and space presence. Politically, it has generally...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
199	1999	Acueducto de Segovia Aqueduct of Segovia The Aqueduct of Segovia is a Roman aqueduct and one of the most significant and best-preserved ancient monuments left on the Iberian Peninsula...		50 AD	Segovia Segovia Segovia is a city in Spain, the capital of Segovia Province in the autonomous community of Castile and León. It is situated north of Madrid, 30 minutes by high speed train. The municipality counts some 55,500 inhabitants.-Etymology:...	Castile and León Castile and León Castile and León is an autonomous community in north-western Spain. It was so constituted in 1983 and it comprises the historical regions of León and Old Castile...	Spain Spain Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...	water supply & control
200	1999	Arroyo Seco Parkway		1940	Los Angeles Los Ángeles Los Ángeles is the capital of the province of Biobío, in the commune of the same name, in Region VIII , in the center-south of Chile. It is located between the Laja and Biobío rivers. The population is 123,445 inhabitants...	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
201	1999	Blue Ridge Parkway Blue Ridge Parkway The Blue Ridge Parkway is a National Parkway and All-American Road in the United States, noted for its scenic beauty. It runs for 469 miles , mostly along the famous Blue Ridge, a major mountain chain that is part of the Appalachian Mountains...		begun 1935		Virginia Virginia The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...  & North Carolina North Carolina North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
202	1999	Cape Hatteras Lighthouse		1870	Cape Hatteras Cape Hatteras Cape Hatteras is a cape on the coast of North Carolina. It is the point that protrudes the farthest to the southeast along the northeast-to-southwest line of the Atlantic coast of North America...	North Carolina North Carolina North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
203	1999	Maine Turnpike		1947		Maine Maine Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
204	1999	McNeill Street Pumping Station		1887	Shreveport Shreveport, Louisiana Shreveport is the third largest city in Louisiana. It is the principal city of the fourth largest metropolitan area in the state of Louisiana and is the 109th-largest city in the United States....	Louisiana Louisiana Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
205	2000	Cedar Falls Water Supply Cedar River (Washington) The Cedar River is a river in the U.S. state of Washington. About long, it originates in the Cascade Range and flows generally west and northwest, emptying into the southern end of Lake Washington...		1901	Seattle	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
206	2000	Forth and Clyde Canal Forth and Clyde Canal The Forth and Clyde Canal crosses Scotland, providing a route for sea-going vessels between the Firth of Forth and the Firth of Clyde at the narrowest part of the Scottish Lowlands. The canal is 35 miles long and its eastern end is connected to the River Forth by a short stretch of the River...  and Union Canal Union Canal (Scotland) The Union Canal is a 31.5-mile canal in Scotland, from Lochrin Basin, Fountainbridge, Edinburgh to Falkirk, where it meets the Forth and Clyde Canal.-Location and features:...		1790			Scotland Scotland Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...	water transportation
207	2000	Hagia Sophia Hagia Sophia Hagia Sophia is a former Orthodox patriarchal basilica, later a mosque, and now a museum in Istanbul, Turkey...		537 AD	Istanbul Istanbul Istanbul , historically known as Byzantium and Constantinople , is the largest city of Turkey. Istanbul metropolitan province had 13.26 million people living in it as of December, 2010, which is 18% of Turkey's population and the 3rd largest metropolitan area in Europe after London and...	Istanbul Istanbul Province Istanbul Province is a province located in north-west Turkey. It has an area of 5,196 km² and a population of 13,255,685. The population was 10,018,735 in 2000. It is surrounded by the provinces of Tekirdağ to the west, Kocaeli to the east, the Black Sea to the northern part and the Sea of...	Turkey Turkey Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...	buildings
208	2000	Muskingum River Navigation System		1837	Zanesville Zanesville, Ohio Zanesville is a city in and the county seat of Muskingum County, Ohio, United States. The population was 25,586 at the 2000 census.Zanesville was named after Ebenezer Zane, who had constructed Zane's Trace, a pioneer road through present-day Ohio...	Ohio Ohio Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
209	2000	Seventh Street Improvement Arches Seventh Street Improvement Arches The Seventh Street Improvement Arches are a double-arched masonry highway bridge that formerly spanned the St. Paul and Duluth Railroad tracks in St. Paul, Minnesota. The Seventh Street Improvement Arches are historically significant for its rarity and the technically demanding nature of its...		1909	St. Paul Saint Paul, Minnesota Saint Paul is the capital and second-most populous city of the U.S. state of Minnesota. The city lies mostly on the east bank of the Mississippi River in the area surrounding its point of confluence with the Minnesota River, and adjoins Minneapolis, the state's largest city...	Minnesota Minnesota Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
210	2000	West Baden Springs Hotel West Baden Springs Hotel The West Baden Springs Hotel is a historic landmark hotel in the town of West Baden Springs in Orange County, Indiana, United States, known for its vast domed atrium. It is currently part of the French Lick Resort...		1902	West Baden Springs West Baden Springs, Indiana West Baden Springs is a town in French Lick Township, Orange County, Indiana, United States. The population was 574 at the 2010 census. It is the birthplace of NBA legend Larry Bird.-Geography:West Baden Springs is located at ....	Indiana Indiana Indiana is a US state, admitted to the United States as the 19th on December 11, 1816. It is located in the Midwestern United States and Great Lakes Region. With 6,483,802 residents, the state is ranked 15th in population and 16th in population density. Indiana is ranked 38th in land area and is...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
211	2001	Bunker Hill Covered Bridge Bunker Hill Covered Bridge The Bunker Hill Covered Bridge is one of two covered bridges left in North Carolina, , and is possibly the last wooden bridge in the United States with Haupt truss construction. It was built in 1895 by Andy L. Ramsour in Claremont, North Carolina, and crosses over Lyle creek...		1895, rebuilt 1994	Claremont Claremont, North Carolina Claremont is a city in Catawba County, North Carolina, United States. The population was 1,355 at the 2010 census. It is part of the Hickory–Lenoir–Morganton Metropolitan Statistical Area.-Geography:...	North Carolina North Carolina North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
212	2001	Galveston Seawall and Grade Raising Galveston Seawall The Galveston Seawall is a seawall in Galveston, Texas, USA that was built after the Galveston Hurricane of 1900 for protection from future hurricanes. Construction began in September, 1902, and the initial segment was completed on July 29, 1904. From 1904 to 1963, the seawall was extended from ...		1904 (expanded through 1963)	Galveston Galveston, Texas Galveston is a coastal city located on Galveston Island in the U.S. state of Texas. , the city had a total population of 47,743 within an area of...	Texas Texas Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
213	2001	Baltimore & Ohio Roundhouse & Shop Complex Martinsburg (Amtrak station) Martinsburg Station is a railway station in Martinsburg, West Virginia, United States served by Amtrak and MARC. The station also included the historic Baltimore and Ohio Railroad roundhouse, and Martinsburg Shops....		1842 to 1850s	Martinsburg Martinsburg, West Virginia Martinsburg is a city in the Eastern Panhandle region of West Virginia, United States. The city's population was 14,972 at the 2000 census; according to a 2009 Census Bureau estimate, Martinsburg's population was 17,117, making it the largest city in the Eastern Panhandle and the eighth largest...	West Virginia West Virginia West Virginia is a state in the Appalachian and Southeastern regions of the United States, bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the northeast and Maryland to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
214	2002	Conwy Suspension Bridge Conwy Suspension Bridge Conwy Suspension Bridge, was one of the first road suspension bridges in the world. Located in the medieval town of Conwy in Conwy county borough, North Wales, it is now only passable on foot. The bridge is now in the care of the National Trust...		1826	Conwy Conwy Conwy is a walled market town and community in Conwy County Borough on the north coast of Wales. The town, which faces Deganwy across the River Conwy, formerly lay in Gwynedd and prior to that in Caernarfonshire. Conwy has a population of 14,208...	Conwy	Wales Wales Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...	bridges
215	2002	Conwy Tubular Bridge Conwy Railway Bridge Conwy railway bridge carries the North Wales coast railway line across the River Conwy between Llandudno Junction and the town of Conwy. The wrought iron tubular bridge was built by Robert Stephenson to a design by William Fairbairn, and is similar in construction to Stephenson's other famous...		1849	Conwy Conwy Conwy is a walled market town and community in Conwy County Borough on the north coast of Wales. The town, which faces Deganwy across the River Conwy, formerly lay in Gwynedd and prior to that in Caernarfonshire. Conwy has a population of 14,208...	Conwy	Wales Wales Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...	bridges
216	2002	Dorton Arena Dorton Arena The J.S. Dorton Arena is a 7,610-seat multi-purpose arena in Raleigh, North Carolina, on the grounds of the North Carolina State Fair...		1952	Raleigh Raleigh, North Carolina Raleigh is the capital and the second largest city in the state of North Carolina as well as the seat of Wake County. Raleigh is known as the "City of Oaks" for its many oak trees. According to the U.S. Census Bureau, the city's 2010 population was 403,892, over an area of , making Raleigh...	North Carolina North Carolina North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
217	2002	East Maui Irrigation System		1876 to 1923	East Maui Maui The island of Maui is the second-largest of the Hawaiian Islands at and is the 17th largest island in the United States. Maui is part of the state of Hawaii and is the largest of Maui County's four islands, bigger than Lānai, Kahoolawe, and Molokai. In 2010, Maui had a population of 144,444,...	Hawaii Hawaii Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
218	2002	Five Stone Arch Bridges Five Stone Arch Bridges Five granite arch bridges in Hillsborough, New Hampshire, United States are designated as National Historic Civil Engineering Landmarks.The bridges were built during the 19th century when there was a need for sturdier construction to replace weaker wooden bridges. The design required exceptional...		1830 to 1866	Hillsborough Hillsborough, New Hampshire Hillsborough, frequently spelled Hillsboro, is a town in Hillsborough County, New Hampshire, United States. The population was 6,011 at the 2010 census...	New Hampshire New Hampshire New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
219	2002	Louisville and Portland Canal Locks & Dam Louisville and Portland Canal The Louisville and Portland Canal was a canal bypassing the Falls of the Ohio in the Ohio River near Louisville, Kentucky. It opened in 1830, and was operated by the Louisville and Portland Canal Company until 1874, and became the McAlpine Locks and Dam in 1962 after heavy modernization.Although...		1830, rebuilt 1962	Louisville Louisville, Kentucky Louisville is the largest city in the U.S. state of Kentucky, and the county seat of Jefferson County. Since 2003, the city's borders have been coterminous with those of the county because of a city-county merger. The city's population at the 2010 census was 741,096...	Kentucky Kentucky The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
220	2002	Marshall Building		1906	Milwaukee	Wisconsin Wisconsin Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
221	2002	Menai Suspension Bridge Menai Suspension Bridge The Menai Suspension Bridge is a suspension bridge between the island of Anglesey and the mainland of Wales. Designed by Thomas Telford and completed in 1826, it was the first modern suspension bridge in the world.-Construction:...		1826	Anglesey Anglesey Anglesey , also known by its Welsh name Ynys Môn , is an island and, as Isle of Anglesey, a county off the north west coast of Wales...		Wales Wales Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...	bridges
222	2002	Old Cape Henry Light,		1881 (current)	Virginia Beach Virginia Beach, Virginia Virginia Beach is an independent city located in the Hampton Roads metropolitan area of Virginia, on the Atlantic Ocean at the mouth of the Chesapeake Bay...	Virginia Virginia The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
223	2002	Portland Head Light Portland Head Light Portland Head Light is a historic lighthouse in Cape Elizabeth, Maine that sits at the entrance of the shipping channel into Casco Bay. The headlight was the first built by the United States government, and is now a part of Fort Williams Park.-History:...		1787	Cape Elizabeth Cape Elizabeth, Maine Cape Elizabeth is a town in Cumberland County, Maine, United States. The town is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area...	Maine Maine Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
224	2002	Shannon Hydroelectric Scheme		1929			Ireland Ireland Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...	power generation
225	2002	Waldo-Hancock Suspension Bridge Waldo-Hancock Bridge The Waldo–Hancock Bridge was the first long-span suspension bridge erected in Maine, as well as the first permanent bridge across the Penobscot River below Bangor. The name comes from connecting Waldo and Hancock counties...		1931	Bucksport	Maine Maine Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
226	2003	Horseshoe Curve		1854	Altoona Altoona, Pennsylvania -History:A major railroad town, Altoona was founded by the Pennsylvania Railroad in 1849 as the site for a shop complex. Altoona was incorporated as a borough on February 6, 1854, and as a city under legislation approved on April 3, 1867, and February 8, 1868...	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	roads & rails
227	2003	Suez Canal Suez Canal The Suez Canal , also known by the nickname "The Highway to India", is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea and the Red Sea. Opened in November 1869 after 10 years of construction work, it allows water transportation between Europe and Asia without navigation...		1869			Egypt Egypt Egypt , officially the Arab Republic of Egypt, Arabic: , is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world...	water transportation
228	2003	Tennessee State Capitol Tennessee State Capitol The Tennessee State Capitol, located in Nashville, Tennessee, is the home of the Tennessee legislature, the location of the governor's office, and a National Historic Landmark. Designed by architect William Strickland, it is one of Nashville's most prominent examples of Greek Revival architecture...		1845 to 1877	Nashville Nashville, Tennessee Nashville is the capital of the U.S. state of Tennessee and the county seat of Davidson County. It is located on the Cumberland River in Davidson County, in the north-central part of the state. The city is a center for the health care, publishing, banking and transportation industries, and is home...	Tennessee Tennessee Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
229	2004	Hwaseong Fortress Hwaseong Fortress Hwaseong , the wall surrounding the centre of Suwon, the provincial capital of Gyeonggi-do, South Korea, was built in the late 18th century by King Jeongjo of the Joseon Dynasty to honour and house the remains of his father Prince Sado, who had been murdered by being locked alive inside a rice...		1796	Suwon Suwon Suwon is the provincial capital of Gyeonggi-do, South Korea. A major city of over a million inhabitants, Suwon lies approximately south of Seoul. It is traditionally known as "The City of Filial Piety"....	Gyeonggi-do Gyeonggi-do Gyeonggi-do is the most populous province in South Korea. The provincial capital is located at Suwon. Seoul—South Korea's largest city and national capital—is located in the heart of the province, but has been separately administered as a provincial-level special city since 1946...	Republic of Korea South Korea The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...	buildings
230	2004	Mesa Verde Reservoirs		750 to 1180 AD	Montezuma County Montezuma County, Colorado Montezuma County is the southwesternmost of the 64 counties of the state of Colorado of the United States. The county population was 23,830 at U.S. Census 2000...	Colorado Colorado Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water supply & control
231	2004	Northern Pacific High Line Bridge No 64 Hi-Line Railroad Bridge Originally called the High Bridge, the Hi-Line Bridge is a historic railroad bridge located over the Sheyenne River in Valley City, North Dakota. The bridge is long and above the river. Construction work began in 1906 and was completed in 1908. At the time it was the longest bridge for its height...		1908	Valley City Valley City, North Dakota As of the census of 2000, there were 6,826 people, 2,996 households, and 1,668 families residing in the city. The population density was 2,062.5 per square mile . There were 3,250 housing units at an average density of 982.0 per square mile...	North Dakota North Dakota North Dakota is a state located in the Midwestern region of the United States of America, along the Canadian border. The state is bordered by Canada to the north, Minnesota to the east, South Dakota to the south and Montana to the west. North Dakota is the 19th-largest state by area in the U.S....	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
232	2004	Old Wisla Bridge			Tczew Tczew Tczew is a town on the Vistula River in Eastern Pomerania, Kociewie, northern Poland with 60,279 inhabitants . It is an important railway junction with a classification yard dating to the Prussian Eastern Railway...	Vistula River	Poland Poland Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...	bridges
233	2005	Great Western Railway Great Western Railway The Great Western Railway was a British railway company that linked London with the south-west and west of England and most of Wales. It was founded in 1833, received its enabling Act of Parliament in 1835 and ran its first trains in 1838...		1838			England England England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...  & Wales Wales Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...	roads & rails
234	2005	Philadelphia City Hall Philadelphia City Hall Philadelphia City Hall is the house of government for the city of Philadelphia, Pennsylvania. At , including the statue, it is the world's second-tallest masonry building, only shorter than Mole Antonelliana in Turin...		1901	Philadelphia	Pennsylvania Pennsylvania The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings
235	2005	Sweetwater Dam Sweetwater River (California) The Sweetwater River is a long stream in southwestern California in the United States. From its headwaters high in the Cuyamaca Mountains, the river flows generally southwest, first through rugged hinterlands but then into the urban areas surrounding its mouth at San Diego Bay. Its drainage basin...		1888	Spring Valley	California California California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	dams
236	2005	Hydraulics Laboratory at the University of Iowa University of Iowa The University of Iowa is a public state-supported research university located in Iowa City, Iowa, United States. It is the oldest public university in the state. The university is organized into eleven colleges granting undergraduate, graduate, and professional degrees...		established 1919	Iowa City Iowa City, Iowa Iowa City is a city in Johnson County, State of Iowa. As of the 2010 Census, the city had a total population of about 67,862, making it the sixth-largest city in the state. Iowa City is the county seat of Johnson County and home to the University of Iowa...	Iowa Iowa Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
237	2006	Machu Picchu Machu Picchu Machu Picchu is a pre-Columbian 15th-century Inca site located above sea level. It is situated on a mountain ridge above the Urubamba Valley in Peru, which is northwest of Cusco and through which the Urubamba River flows. Most archaeologists believe that Machu Picchu was built as an estate for...		1460 AD			Peru Peru Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....	civil engineering profession
238	2006	Portland Observatory Portland Observatory The Portland Observatory, built in 1807 at Portland, Maine, is the last surviving maritime signal tower in the United States. Using both a telescope and signal flags, two-way communication between ship and shore was possible several hours before an incoming vessel reached the...		1807	Portland Portland, Maine Portland is the largest city in Maine and is the county seat of Cumberland County. The 2010 city population was 66,194, growing 3 percent since the census of 2000...	Maine Maine Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	water transportation
239	2006	Tipon Tipón Tipón, located east of Cusco, are Inca ruins may have been a park for upper class or agricultural centrum. Still today, water is rushing though the channels, which is seldom, and the wide terraces, masterpieces of mortar-less walls, are in perfect condition. Several surrounding ruins are excavated,...		1200 - 1534 AD			Peru Peru Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....	water supply & control
240	2007	Caledonian Canal Caledonian Canal The Caledonian Canal is a canal in Scotland that connects the Scottish east coast at Inverness with the west coast at Corpach near Fort William. It was constructed in the early nineteenth century by engineer Thomas Telford, and is a sister canal of the Göta Canal in Sweden, also constructed by...		1822	Great Glen Great Glen The Great Glen , also known as Glen Albyn or Glen More is a series of glens in Scotland running 100 kilometres from Inverness on the Moray Firth, to Fort William at the head of Loch Linnhe.The Great Glen follows a large geological fault known as the Great Glen Fault...		Scotland Scotland Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...	water transportation
241	2007	Craigellachie Bridge Craigellachie Bridge The Craigellachie Bridge is a cast iron arch bridge located at Craigellachie which is near to the village of Aberlour in Moray, Scotland. It was designed by the renowned civil engineer Thomas Telford and built from 1812–1814...  Moray Moray Moray is one of the 32 council areas of Scotland. It lies in the north-east of the country, with coastline on the Moray Firth, and borders the council areas of Aberdeenshire and Highland.- History :...		1814	Strathspey Strathspey, Scotland Strathspey is the area around the strath of the River Spey, Scotland, in both the Moray council area and the Badenoch and Strathspey committee area of Highland....		Scotland Scotland Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...	bridges
242	2008	Choate Bridge Choate Bridge Choate Bridge is a historic stone arch bridge on Route 1A/Route 133 over the Ipswich River in Ipswich, Massachusetts that is the oldest surviving double arch bridge in North America.-History:...		1764	Ipswich Ipswich, Massachusetts Ipswich is a coastal town in Essex County, Massachusetts, United States. The population was 12,987 at the 2000 census. Home to Willowdale State Forest and Sandy Point State Reservation, Ipswich includes the southern part of Plum Island...	Massachusetts Massachusetts The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
243	2008	Goldfields Water Supply Goldfields Water Supply Scheme The Goldfields Water Supply Scheme is a pipeline and dam project which delivers potable water to communities in Western Australia's Eastern Goldfields, particularly Coolgardie and Kalgoorlie...		1903	Kalgoorlie Kalgoorlie, Western Australia Kalgoorlie, known as Kalgoorlie-Boulder, is a town in the Goldfields-Esperance region of Western Australia, and is located east-northeast of state capital Perth at the end of the Great Eastern Highway...	Western Australia Western Australia Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...	Australia Australia Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...	water supply & control
244	2008	Lacey V. Murrow Bridge and Mount Baker Ridge Tunnels Lacey V. Murrow Memorial Bridge The Lacey V. Murrow Memorial Bridge is a floating bridge that carries the eastbound lanes of Interstate 90 across Lake Washington from Seattle to Mercer Island, Washington. It is the second longest floating bridge on Earth at , whereas the longest is the Evergreen Point Floating Bridge just a few...		1940	King County King County, Washington King County is a county located in the U.S. state of Washington. The population in the 2010 census was 1,931,249. King is the most populous county in Washington, and the 14th most populous in the United States....	Washington	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
245	2008	Woodhead Dam Woodhead Dam Woodhead Dam is a dam on Table Mountain, Western Cape, South Africa. It was built in 1897 and supplies water to Cape Town. The dam, which was the first large masonry dam in South Africa, was designated as an International Historic Civil Engineering Landmark by the American Society of Civil...		1897	Cape Town Cape Town Cape Town is the second-most populous city in South Africa, and the provincial capital and primate city of the Western Cape. As the seat of the National Parliament, it is also the legislative capital of the country. It forms part of the City of Cape Town metropolitan municipality...	Western Cape Western Cape The Western Cape is a province in the south west of South Africa. The capital is Cape Town. Prior to 1994, the region that now forms the Western Cape was part of the much larger Cape Province...	South Africa South Africa The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...	dams
246	2009	Guayabo Ceremonial Center Guayabo Guayabo de Turrialba is an archeological site located in Turrialba, Costa Rica. The site is of great archeological and cultural importance even though only a very small portion of the city has been uncovered and studied. The monument covers 540 acres and is located on the forested southern slope...		300 BC - AD 1400	Turrialba	Turrialba	Costa Rica Costa Rica Costa Rica , officially the Republic of Costa Rica is a multilingual, multiethnic and multicultural country in Central America, bordered by Nicaragua to the north, Panama to the southeast, the Pacific Ocean to the west and the Caribbean Sea to the east....	civil engineering profession
247	2009	Vancouver's Mapping of the West Coast of North America Vancouver Expedition The Vancouver Expedition was a four-and-a-half-year voyage of exploration and diplomacy, commanded by Captain George Vancouver. The expedition circumnavigated the globe, touched five continents and changed the course of history for the indigenous nations and several European empires and their...		1791–1795			Canada Canada Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean... , Mexico Mexico The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...  and United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	boundaries & surveys
248	2009	Poughkeepsie-Highland Bridge Poughkeepsie Bridge The Poughkeepsie Bridge is a steel cantilever bridge spanning the Hudson River between Poughkeepsie, New York on the east bank and Highland, New York on the west bank...		1886–1888	Poughkeepsie	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
249	2009	Manhattan Bridge Manhattan Bridge The Manhattan Bridge is a suspension bridge that crosses the East River in New York City, connecting Lower Manhattan with Brooklyn . It was the last of the three suspension bridges built across the lower East River, following the Brooklyn and the Williamsburg bridges...		1909	New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
250	2009	Queensboro Bridge Queensboro Bridge The Ed Koch Queensboro Bridge, also known as the 59th Street Bridge – because its Manhattan end is located between 59th and 60th Streets – or simply the Queensboro Bridge, is a cantilever bridge over the East River in New York City that was completed in 1909...		1909	New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
251	2009	Williamsburg Bridge Williamsburg Bridge The Williamsburg Bridge is a suspension bridge in New York City across the East River connecting the Lower East Side of Manhattan at Delancey Street with the Williamsburg neighborhood of Brooklyn at Broadway near the Brooklyn-Queens Expressway...		1903	New York City New York City New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
252	2010	Mackinac Bridge Mackinac Bridge The Mackinac Bridge is a suspension bridge spanning the Straits of Mackinac to connect the non-contiguous Upper and Lower peninsulas of the U.S. state of Michigan. Opened in 1957, the bridge is the third longest in total suspension in the world and the longest suspension bridge between anchorages...		1958	Straits of Mackinac Straits of Mackinac The Straits of Mackinac is the strip of water that connects two of the Great Lakes, Lake Michigan and Lake Huron, and separates the Lower Peninsula of Michigan from the Upper Peninsula of Michigan. It is a shipping lane providing passage for raw materials and finished goods, connecting, for...	Michigan Michigan Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake"....	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	bridges
253	2010	Rensselaer Polytechnic Institute Rensselaer Polytechnic Institute Stephen Van Rensselaer established the Rensselaer School on November 5, 1824 with a letter to the Rev. Dr. Samuel Blatchford, in which van Rensselaer asked Blatchford to serve as the first president. Within the letter he set down several orders of business. He appointed Amos Eaton as the school's...		1824	Troy Troy, New York Troy is a city in the US State of New York and the seat of Rensselaer County. Troy is located on the western edge of Rensselaer County and on the eastern bank of the Hudson River. Troy has close ties to the nearby cities of Albany and Schenectady, forming a region popularly called the Capital...	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	civil engineering profession
254	2011	Utica Memorial Auditorium Utica Memorial Auditorium Utica Memorial Auditorium is a 4,000-seat multi-purpose arena in Utica, New York, with a capacity of 5,700 for concerts.It was built in 1959 on the site of the old Erie Canal. When it was completed, the "Aud" was one of just three arenas built without obstructed views. It hosted the 1962 NCAA...		1959	Utica Utica, New York Utica is a city in and the county seat of Oneida County, New York, United States. The population was 62,235 at the 2010 census, an increase of 2.6% from the 2000 census....	New York New York New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...	United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	buildings

External links

• American Society of Civil Engineers - National Civil Engineering Landmarks Program
• American Society of Civil Engineers - Search by landmark name, project type, city, year of designation