Lee Mankin
Lee Mankin is an earth dam located in Campbell County, Wyoming, built in 1956. It carries a Low hazard potential classification and has a fair condition assessment.
About Lee Mankin
The primary purpose of Lee Mankin is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by John William Mankin Rev. Trust (private). It impounds the North Fork Of Dead Horse Creek near Arvada.
The dam stands 29 feet tall and stretches 404 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 155 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1956, the structure is well into its service life at over 50 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 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 09/28/2023.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | Arvada |
| River/Stream | North Fork Of Dead Horse Creek |
| Coordinates | 44.15278, -105.77528 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 404 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 155 acre-ft |
| Max Storage | 155 acre-ft |
| Normal Storage | 93 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | JOHN WILLIAM MANKIN REV. TRUST |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/28/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00482 |
| Federal ID | WY00482 |
| More Info | State Dam Safety Program |