Bar D
Bar D is a dam located in Custer County, Idaho, built in 1950. It carries a Significant hazard potential classification and has a fair condition assessment.
About Bar D
The primary purpose of Bar D is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is private-owned. It impounds the Warm Spring Creek Salmon River near Hwy 93.
The dam stands 26 feet tall and stretches 600 feet across, creates a reservoir covering 29 acres, has a storage capacity of 227 acre-feet, and collects water from a drainage area of 138 square miles. Completed in 1950, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 11/12/2019.
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Location
| State | Idaho |
| County | Custer |
| Nearest City | Hwy 93 |
| River/Stream | Warm Spring Creek Salmon River |
| Coordinates | 44.44120, -114.14110 |
Physical Characteristics
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 600 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 227 acre-ft |
| Normal Storage | 227 acre-ft |
| Surface Area | 29 acres |
| Drainage Area | 138 sq mi |
| Max Discharge | 260 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/12/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00137 |
| Federal ID | ID00137 |
| More Info | State Dam Safety Program |