North Windmill is an earth dam located in Campbell County, Wyoming, built in 2006. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 47 ft47 ft tall and 340 ft long, taller than 91% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About North Windmill
The primary purpose of North Windmill is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Moriah Wyoming Ranches, LLC & Anadarko E&p Onshore, LLC (private). It impounds the Mill Draw near Unnamed Ranch.
The dam stands 47 feet tall and stretches 340 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 35 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2006, 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 04/27/2021.
At 47 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | Unnamed Ranch |
| River/Stream | Mill Draw |
| Coordinates | 44.15400, -105.94770 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 47 ft |
| Dam Height | 47 ft |
| Dam Length | 340 ft |
| Year Completed | 2006 (20 years old) |
Storage & Hydraulics
| NID Storage | 35 acre-ft |
| Max Storage | 35 acre-ft |
| Normal Storage | 17 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 753 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Moriah Wyoming Ranches, LLC & Anadarko E&p Onshore, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/27/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY02373 |
| Federal ID | WY02373 |
| More Info | State Dam Safety Program |