Star Mountain Reservoir, also known as Lower Chapman Dam, is a privately owned water resource located in Malheur County, Oregon.
Wind
Humidity
Built in 1961, this earth dam stands at a height of 66 feet and has a storage capacity of 1460 acre-feet, primarily used for irrigation purposes. Situated on the No. Fork Granite Creek, this reservoir covers a surface area of 25 acres and has a drainage area of 87 square miles.
Managed by the Oregon Water Resources Department, Star Mountain Reservoir poses a significant hazard potential and undergoes inspections every 3 years. With a moderate risk assessment rating, the dam features an uncontrolled spillway and slide gates for outlet control. Its location in Riverside, Oregon, makes it an essential component of the local water supply infrastructure, ensuring water availability for agriculture in the region.
For water resource and climate enthusiasts, Star Mountain Reservoir represents a vital piece of Oregon's irrigation network, serving as a strategic water storage facility for the surrounding area. As a privately owned structure regulated by the state, its role in water management and conservation is crucial for sustaining agricultural activities in Malheur County. With its historical significance and ongoing maintenance, this reservoir continues to play a key role in ensuring water security and resource sustainability in the region.
Year Completed |
1961 |
Dam Length |
285 |
Dam Height |
66 |
River Or Stream |
NO. FORK GRANITE CREEK |
Primary Dam Type |
Earth |
Surface Area |
25 |
Hydraulic Height |
66 |
Drainage Area |
87 |
Nid Storage |
1460 |
Structural Height |
68 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Significant |
Nid Height |
68 |