Bradshaw Detention Dam #4
Bradshaw Detention Dam #4 is a gravity dam located in Custer County, Idaho, built in 1967. It carries a Low hazard potential classification.
About Bradshaw Detention Dam #4
The primary purpose of Bradshaw Detention Dam #4 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Doi Blm (federal). It impounds the Bradshaw Gulch near Ranch House.
The dam stands 49 feet tall and stretches 446 feet across, creates a reservoir covering 21 acres, has a maximum storage capacity of 120 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1967, 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 07/12/2007. That was over 18 years ago.
At 49 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Idaho |
| County | Custer |
| Nearest City | Ranch House |
| River/Stream | Bradshaw Gulch |
| Coordinates | 44.30956, -114.25506 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 49 ft |
| Dam Length | 446 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 21 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 574 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 07/12/2007 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00424 |
| Federal ID | ID00424 |
| More Info | State Dam Safety Program |