Diamond A
Diamond A is a dam located in Owyhee County, Idaho, built in 1931. It carries a Low hazard potential classification and has a fair condition assessment.
About Diamond A
Diamond A is a dam in Owyhee, Idaho. The dam is private-owned. It impounds the Cougar Creek Jarbidge River.
The dam stands 29 feet tall and stretches 350 feet across, creates a reservoir covering 325 acres, has a storage capacity of 3,926 acre-feet, and collects water from a drainage area of 31 square miles. Completed in 1931, the structure is well-established, with more than 75 years of service.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 06/01/2018.
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Location
| State | Idaho |
| County | Owyhee |
| River/Stream | Cougar Creek Jarbidge River |
| Coordinates | 42.09510, -115.56270 |
Physical Characteristics
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 350 ft |
| Year Completed | 1931 (95 years old) |
Storage & Hydraulics
| NID Storage | 3,926 acre-ft |
| Normal Storage | 3,926 acre-ft |
| Surface Area | 325 acres |
| Drainage Area | 31 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/01/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00083 |
| Federal ID | ID00083 |
| More Info | State Dam Safety Program |