Three Mile is an earth dam located in Albany County, Wyoming, built in 1904. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 510 ft long. 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 Three Mile
The primary purpose of Three Mile is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wagonhound Land & Livestock Company LLC (private). It impounds the Three Mile Creek near Alcova.
The dam stands 18 feet tall and stretches 510 feet across, creates a reservoir covering 30 acres, and has a maximum storage capacity of 130 acre-feet. Completed in 1904, the structure is over a century 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 09/09/2024.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Albany |
| Nearest City | Alcova |
| River/Stream | Three Mile Creek |
| Coordinates | 42.35490, -106.01470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 510 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 130 acre-ft |
| Max Storage | 130 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 30 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Wagonhound Land & Livestock Company LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/09/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00353 |
| Federal ID | WY00353 |
| More Info | State Dam Safety Program |