Sommerville is a dam located in Owyhee County, Idaho, built in 1926. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 29 ft29 ft tall and 320 ft long, taller than 65% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Sommerville
Sommerville is a dam in Owyhee, Idaho. The dam is private-owned. It impounds the North Fork Castle Creek Deep Creek.
The dam stands 29 feet tall and stretches 320 feet across, creates a reservoir covering 50 acres, has a storage capacity of 550 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1926, 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 09/25/2017.
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Location
| State | Idaho |
| County | Owyhee |
| River/Stream | North Fork Castle Creek Deep Creek |
| Coordinates | 42.46390, -116.75590 |
Physical Characteristics
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 320 ft |
| Year Completed | 1926 (100 years old) |
Storage & Hydraulics
| NID Storage | 550 acre-ft |
| Normal Storage | 550 acre-ft |
| Surface Area | 50 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 84 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/25/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00094 |
| Federal ID | ID00094 |
| More Info | State Dam Safety Program |