Crosby
Crosby is an earth dam located in Big Horn County, Wyoming, built in 1980. It carries a Significant hazard potential classification and has a poor condition assessment.
About Crosby
The primary purpose of Crosby is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Timothy J. Woods & Samantha Wright (private). It impounds the Gypsum Creek.
The dam stands 40 feet tall and stretches 440 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 142 acre-feet, and collects water from a drainage area of 14 square miles. Completed in 1980, the structure is 46 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/11/2021.
At 40 feet, this dam is taller than 87% of dams nationwide.
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Location
| State | Wyoming |
| County | Big Horn |
| River/Stream | Gypsum Creek |
| Coordinates | 44.99350, -108.41680 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 440 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 142 acre-ft |
| Max Storage | 142 acre-ft |
| Normal Storage | 107 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 204 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | TIMOTHY J. WOODS & SAMANTHA WRIGHT |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/11/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01605 |
| Federal ID | WY01605 |
| More Info | State Dam Safety Program |