Horsethief is a dam located in Valley County, Idaho, built in 1967. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 53 ft53 ft tall and 220 ft long, taller than 93% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Horsethief
Horsethief is a dam in Valley, Idaho. The dam is state-owned. It impounds the Horsethief Creek Big Creek near Payette River.
The dam stands 53 feet tall and stretches 220 feet across, creates a reservoir covering 185 acres, has a storage capacity of 4,900 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 06/20/2019.
At 53 feet, this dam is taller than 93% of dams nationwide.
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Location
| State | Idaho |
| County | Valley |
| Nearest City | Payette River |
| River/Stream | Horsethief Creek Big Creek |
| Coordinates | 44.50480, -115.92220 |
Physical Characteristics
| NID Height | 53 ft |
| Dam Height | 53 ft |
| Dam Length | 220 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 4,900 acre-ft |
| Normal Storage | 4,900 acre-ft |
| Surface Area | 185 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 310 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 06/20/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ID00128 |
| Federal ID | ID00128 |
| More Info | State Dam Safety Program |