Henry Hagg Lake

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Henry Hagg Lake
Aerial View of Henry Hagg Lake.JPG
Aerial view of the lake
LocationOregon Coast Range foothills, Washington County, Oregon, United States
Coordinates45°28′24″N 123°12′12″W / 45.47345°N 123.20344°W / 45.47345; -123.20344Coordinates: 45°28′24″N 123°12′12″W / 45.47345°N 123.20344°W / 45.47345; -123.20344
Primary inflowsScoggins Creek
Primary outflowsTualatin River
Basin countriesUnited States
Surface area1,153 acres (4.67 km2)[1]
Average depth51 ft (16 m)[1]
Max. depth110 ft (34 m)[1]
Water volume59,910 acre⋅ft (73,900,000 m3)[1]
Surface elevation303.5 ft (92.5 m)[2]

Henry Hagg Lake (also Hagg Lake) is an artificial lake in northwest Oregon, in the United States. The reservoir is an impoundment of Scoggins Creek, which drains a small portion of the eastern side of the Northern Oregon Coast Range.[3] The lake and creek are part of the Tualatin River’s watershed in the Tualatin Valley.[4] It is located about 5 miles (8.0 km) southwest of Forest Grove.[5]

Scoggins Dam

Scoggins Dam[edit]

Scoggins Dam was built in 1975 by the United States Bureau of Reclamation, which still owns and operates the facility.[4] Hagg Lake contains 53,640 acre feet (66,160,000 m3) of water that can be used.[4] Some water from the lake is used by Clean Water Services to augment the flow of the Tualatin River during the summer months to reduce the temperature and improve water quality.[4] Other users include four cities and the Tualatin Valley Water District.[4]

See also[edit]


  1. ^ a b c d "Henry Hagg Lake (Washington)". Atlas of Oregon Lakes. Retrieved 6 January 2016.
  2. ^ "Henry Hagg Lake Water Quality Model". USGS. Retrieved 6 January 2016.
  3. ^ Washington County Soil and Water Conservation District and U.S. Department of the Interior, BLM it also hold the Oregon State recod for Smallmouth Bass. (February 2000). "Upper Tualatin-Scoggins Watershed Analysis" (PDF). Archived from the original (PDF) on September 28, 2007. Retrieved July 8, 2007.
  4. ^ a b c d e Colby, Richard. Hagg Lake water helps river run. The Oregonian, July 1, 2004.
  5. ^ "Geographic Names Information System Feature Detail Report Henry Hagg Lake". Retrieved July 8, 2007.

External links[edit]