Star Mountain Reservoir
Star Mountain Reservoir is an earth dam located in Malheur County, Oregon, built in 1961. It carries a Significant hazard potential classification.
About Star Mountain Reservoir
The primary purpose of Star Mountain Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Laramie Dawson (private). It impounds the No. Fork Granite Creek near Riverside.
The dam stands 68 feet tall and stretches 285 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 1,460 acre-feet, and collects water from a drainage area of 87 square miles. Completed in 1961, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 08/27/2019.
At 68 feet, this dam is taller than 96% of all dams in the United States.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oregon |
| County | Malheur |
| Nearest City | Riverside |
| River/Stream | No. Fork Granite Creek |
| Coordinates | 43.53137, -118.07814 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 68 ft |
| Dam Height | 66 ft |
| Dam Length | 285 ft |
| Year Completed | 1961 (65 years old) |
Storage & Hydraulics
| NID Storage | 1,460 acre-ft |
| Max Storage | 1,460 acre-ft |
| Normal Storage | 940 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 87 sq mi |
| Max Discharge | 420 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LARAMIE DAWSON |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 08/27/2019 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OR00361 |
| Federal ID | OR00361 |
| More Info | State Dam Safety Program |