Bitterroot No. 1 is an earth dam located in Fremont County, Wyoming, built in 1977. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 33 ft33 ft tall and 440 ft long, taller than 76% 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 Bitterroot No. 1
The primary purpose of Bitterroot No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bitterroot Ranch Limited Partnership (private). It impounds the Fox Draw Trib of Alkali Creek.
The dam stands 33 feet tall and stretches 440 feet across, creates a reservoir covering 3 acres, has a storage capacity of 24 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1977, the structure is 49 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/21/2025.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Wyoming |
| County | Fremont |
| River/Stream | Fox Draw Trib of Alkali Creek |
| Coordinates | 43.63800, -109.38750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 440 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 24 acre-ft |
| Normal Storage | 24 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,312 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Bitterroot Ranch Limited Partnership |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/21/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01510 |
| Federal ID | WY01510 |
| More Info | State Dam Safety Program |