Hershiser Reservoir
Hershiser Reservoir is an earth dam located in Clackamas County, Oregon, built in 1972. It carries a Low hazard potential classification.
About Hershiser Reservoir
The primary purpose of Hershiser Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Don Hershiser (private). It impounds the Willamette River, Trib To near Oregon City.
The dam stands 42 feet tall and stretches 420 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 38 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1972, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 10/25/2018.
At 42 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Oregon |
| County | Clackamas |
| Nearest City | Oregon City |
| River/Stream | Willamette River, Trib To |
| Coordinates | 45.33082, -122.66506 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 420 ft |
| Year Completed | 1972 (54 years old) |
Storage & Hydraulics
| NID Storage | 38 acre-ft |
| Max Storage | 38 acre-ft |
| Normal Storage | 33 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 120 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | DON HERSHISER |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 10/25/2018 |
| Emergency Action Plan | No |
Identifiers
| NID ID | OR00518 |
| Federal ID | OR00518 |
| More Info | State Dam Safety Program |