South Arm Reservoir
South Arm Reservoir is an earth dam located in Lake County, Oregon, built in 1908. It carries a Low hazard potential classification.
About South Arm Reservoir
The primary purpose of South Arm Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Richard E Morgan (private). It impounds the Hay Creek near West Side.
The dam stands 19 feet tall and stretches 170 feet across, creates a reservoir covering 128 acres, has a maximum storage capacity of 560 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1908, the structure is over a century 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 08/12/2015. That was over 10 years ago.
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Location
| State | Oregon |
| County | Lake |
| Nearest City | West Side |
| River/Stream | Hay Creek |
| Coordinates | 42.08256, -120.80374 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 170 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 560 acre-ft |
| Max Storage | 560 acre-ft |
| Normal Storage | 560 acre-ft |
| Surface Area | 128 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 180 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | RICHARD E MORGAN |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 08/12/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00078 |
| Federal ID | OR00078 |
| More Info | State Dam Safety Program |