The Panama-Pacific International Exposition (PPIE) was a world's fair held in San Francisco, California

San Francisco, California

San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

 between February 20 and December 4 in 1915. Its ostensible purpose was to celebrate the completion of the 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...

, but it was widely seen in the city as an opportunity to showcase its recovery from the 1906 earthquake

1906 San Francisco earthquake

The San Francisco earthquake of 1906 was a major earthquake that struck San Francisco, California, and the coast of Northern California at 5:12 a.m. on Wednesday, April 18, 1906. The most widely accepted estimate for the magnitude of the earthquake is a moment magnitude of 7.9; however, other...

. The fair was constructed on a 635 acre (2.6 km²) site in San Francisco, along the northern shore now known as the Marina.
Among the exhibits at the Exposition was C. P. Huntington

C. P. Huntington

C. P. Huntington is a 4-2-4T steam locomotive currently on static display at the California State Railroad Museum in Sacramento, California, USA. It is the first locomotive purchased by the Southern Pacific Railroad, carrying that railroad's number 1. The locomotive is named in honor of Collis P...

, the first steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

 purchased by Southern Pacific Railroad

Southern Pacific Railroad

The Southern Pacific Transportation Company , earlier Southern Pacific Railroad and Southern Pacific Company, and usually simply called the Southern Pacific or Espee, was an American railroad....

; the locomotive is now on static display at the California State Railroad Museum

California State Railroad Museum

The California State Railroad Museum is a museum in the state park system of California, USA, interpreting the role of the "iron horse" in connecting California to the rest of the nation. It is located in Old Sacramento at 111 I Street....

 in Sacramento

Sacramento, California

Sacramento is the capital city of the U.S. state of California and the county seat of Sacramento County. It is located at the confluence of the Sacramento River and the American River in the northern portion of California's expansive Central Valley. With a population of 466,488 at the 2010 census,...

.