Henry Hagg Lake is an artificial lake in northwest 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, which is an impoundment of Scoggins Creek

Scoggins Creek

Scoggins Creek, formerly known as Scoggin Creek, is a southeast-flowing stream in Washington County, Oregon, United States, named for pioneer Gustavus Scoggin. Surrounded by lava and basalt flows and layers of sandstone, it flows through the wide Scoggins Creek Valley to Henry Hagg Lake, impounded...

 which drains a small portion of the eastern side of Northern Oregon Coast Range

Northern Oregon Coast Range

The Northern Oregon Coast Range is the northern section of the Oregon Coast Range, in the Pacific Coast Ranges physiographic region, located in the northwest portion of the state of Oregon, United States. This section of the mountain range, part of the Pacific Coast Ranges, contains peaks as high...

. The lake and creek are part of the Tualatin River

Tualatin River

The Tualatin River is a tributary of the Willamette River located in Oregon in the United States. The river is approximately long, and it drains a fertile farming region called the Tualatin Valley southwest and west of Portland at the northwest corner of the Willamette Valley...

’s watershed in the Tualatin Valley

Tualatin Valley

The Tualatin Valley is a farming and suburban region southwest of Portland, Oregon in the United States. The valley is formed by the meandering Tualatin River, a tributary of the Willamette River at the northwest corner of the Willamette Valley, east of the Northern Oregon Coast Range...

. It is located about 5 miles (8 km) southwest of Forest Grove, Oregon

Forest Grove, Oregon

Forest Grove is a city in Washington County, Oregon, United States, west of Portland. Originally a small farm town, it is now primarily a bedroom suburb of Portland. Settled in the 1840s, the town was platted in 1850 and then incorporated in 1872 and was the first city in Washington County...

.

Details

The United States Bureau of Reclamation

United States Bureau of Reclamation

The United States Bureau of Reclamation , and formerly the United States Reclamation Service , is an agency under the U.S...

 constructed the dam, and owns and operates the facility. Hagg Lake contains 53640 acre.ft of water that can be used. Some water from the lake is used by Clean Water Services

Clean Water Services

Clean Water Services is the water resource management utility for more than 500,000 residents in urban Washington County, Oregon and small portions of Multnomah County, Oregon and Clackamas County, Oregon, in the United States...

to augment the flow of the Tualatin River during the summer months to reduce the temperature and improve water quality. Other users include four cities and the Tualatin Valley Irrigation District.