Hanna Pilot Reservoir
Hanna Pilot Reservoir is an earth dam located in Carbon County, Wyoming, built in 2001. It carries a Low hazard potential classification and has a fair condition assessment.
About Hanna Pilot Reservoir
Hanna Pilot Reservoir is a dam in Carbon, Wyoming. The dam is owned by Anadarko Land Corporation (private). It impounds the Hanna Draw near Local Road.
The dam stands 27 feet tall and stretches 1,077 feet across, creates a reservoir covering 46 acres, has a maximum storage capacity of 755 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2001, the structure is relatively new.
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 07/10/2025.
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Location
| State | Wyoming |
| County | Carbon |
| Nearest City | Local Road |
| River/Stream | Hanna Draw |
| Coordinates | 41.96410, -106.43630 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 22 ft |
| Dam Length | 1,077 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 755 acre-ft |
| Max Storage | 755 acre-ft |
| Normal Storage | 500 acre-ft |
| Surface Area | 46 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | ANADARKO LAND CORPORATION |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/10/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02275 |
| Federal ID | WY02275 |
| More Info | State Dam Safety Program |