Willits
Willits is an earth dam located in Johnson County, Wyoming, built in 1940. It carries a Low hazard potential classification and has a fair condition assessment.
About Willits
The primary purpose of Willits is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Big Horn Reservoir Company (private). It impounds the W. Fork Little Goose Creek near Big Horn.
The dam stands 22 feet tall and stretches 400 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 96 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1940, 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 06/27/2024.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Big Horn |
| River/Stream | W. Fork Little Goose Creek |
| Coordinates | 44.53300, -107.19700 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 400 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 96 acre-ft |
| Max Storage | 96 acre-ft |
| Normal Storage | 79 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 550 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | BIG HORN RESERVOIR COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/27/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01351 |
| Federal ID | WY01351 |
| More Info | State Dam Safety Program |