The lake is named for Henry Hagg, an Oregon dairy farmer who was active in local agricultural committees during the first half of the twentieth century.
Scoggins Dam
Scoggins Dam
Scoggins Dam was built in 1975 by the United States Bureau of Reclamation, which still owns and operates the facility. Hagg Lake contains 53,640 acre-feet (66,160,000 m) of water that can be used. 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. Other users include four cities and the Tualatin Valley Water District.
Ecology and Geology
In 1967, fossilized shark remains were discovered near the lake.
^Washington County Soil and Water Conservation District and U.S. Department of the Interior, BLM (February 2000). "Upper Tualatin-Scoggins Watershed Analysis"(PDF). Archived from the original(PDF) on September 28, 2007. Retrieved July 8, 2007.
^ Colby, Richard. Hagg Lake water helps river run. The Oregonian, July 1, 2004.