Henry Hagg Lake is a reservoir located in the foothills of the eastern slope of the Coast Range Mountains of northwestern Oregon. The lake is used for recreation in the summer and flood control in the winter.
Henry Hagg Lake is a reservoir located in the foothills of the eastern slope of the Coast Range Mountains of northwestern Oregon. The lake was formed by Scoggins Dam, an earthfill structure that impounds Scoggins Creek, a tributary of the Tualatin River. Hagg Lake was filled and began normal operation in 1975. At a maximum water elevation of 93.2 meters (305.8 feet) above sea level, the lake's total storage capacity is 64,812 acre-feet, with a maximum surface area of 1.8 square miles. The normal full pool water elevation is 92.5 meters (303.5 feet), with a capacity of 62,216 acre-feet, and a surface area of 1.7 square miles. The dam was built and is owned by the Bureau of Reclamation, which contracts with the Tualatin Valley Irrigation District for operation and maintenance. More information about the Scoggins Dam project is available from the Bureau of Reclamation.
The objectives of this study were to develop a model of Hagg Lake that:
- simulated the circulation, temperature, and water quality in the lake,
- improved understanding of lake circulation and water quality and the processes affecting them, and
- predicted changes in circulation, temperature, and quality that might result from a suite of proposed dam modifications.
Below are publications associated with this project.
Modeling water quality effects of structural and operational changes to Scoggins Dam and Henry Hagg Lake, Oregon
Modeling hydrodynamics, temperature and water quality in Henry Hagg Lake, Oregon, 2000-2003
- Overview
Henry Hagg Lake is a reservoir located in the foothills of the eastern slope of the Coast Range Mountains of northwestern Oregon. The lake is used for recreation in the summer and flood control in the winter.
Henry Hagg Lake is a reservoir located in the foothills of the eastern slope of the Coast Range Mountains of northwestern Oregon. The lake was formed by Scoggins Dam, an earthfill structure that impounds Scoggins Creek, a tributary of the Tualatin River. Hagg Lake was filled and began normal operation in 1975. At a maximum water elevation of 93.2 meters (305.8 feet) above sea level, the lake's total storage capacity is 64,812 acre-feet, with a maximum surface area of 1.8 square miles. The normal full pool water elevation is 92.5 meters (303.5 feet), with a capacity of 62,216 acre-feet, and a surface area of 1.7 square miles. The dam was built and is owned by the Bureau of Reclamation, which contracts with the Tualatin Valley Irrigation District for operation and maintenance. More information about the Scoggins Dam project is available from the Bureau of Reclamation.
The objectives of this study were to develop a model of Hagg Lake that:
- simulated the circulation, temperature, and water quality in the lake,
- improved understanding of lake circulation and water quality and the processes affecting them, and
- predicted changes in circulation, temperature, and quality that might result from a suite of proposed dam modifications.
- Publications
Below are publications associated with this project.
Modeling water quality effects of structural and operational changes to Scoggins Dam and Henry Hagg Lake, Oregon
To meet water quality targets and the municipal and industrial water needs of a growing population in the Tualatin River Basin in northwestern Oregon, an expansion of Henry Hagg Lake is under consideration. Hagg Lake is the basin's primary storage reservoir and provides water during western Oregon's typically dry summers. Potential modifications include raising the dam height by 6.1 meters (20 feeAuthorsAnnett B. Sullivan, Stewart A. RoundsModeling hydrodynamics, temperature and water quality in Henry Hagg Lake, Oregon, 2000-2003
The two-dimensional model CE-QUAL-W2 was used to simulate hydrodynamics, temperature, and water quality in Henry Hagg Lake, Oregon, for the years 2000 through 2003. Input data included lake bathymetry, meteorologic conditions, tributary inflows, tributary temperature and water quality, and lake outflows. Calibrated constituents included lake hydrodynamics, water temperature, orthophosphate, totalAuthorsAnnette B. Sullivan, Stewart A. Rounds