North Crow Diversion is an arch dam located in Laramie County, Wyoming, built in 1910. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 46 ft46 ft tall and 146 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 arch section and the water level is illustrative.
About North Crow Diversion
The primary purpose of North Crow Diversion is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by City of Cheyenne-cbpu (local government). It impounds the North Fork of Crow Creek near Cheyenne.
The dam stands 46 feet tall and stretches 146 feet across, has a maximum storage capacity of 4,000 acre-feet, and collects water from a drainage area of 28 square miles. Completed in 1910, the structure is over a century 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 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 04/28/2022.
At 46 feet, this dam is taller than 91% of dams nationwide.
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Location
| State | Wyoming |
| County | Laramie |
| Nearest City | Cheyenne |
| River/Stream | North Fork of Crow Creek |
| Coordinates | 41.22056, -105.18722 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 46 ft |
| Dam Height | 46 ft |
| Dam Length | 146 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 4,000 acre-ft |
| Max Storage | 4,000 acre-ft |
| Normal Storage | 75 acre-ft |
| Drainage Area | 28 sq mi |
| Max Discharge | 115 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Cheyenne-cbpu |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 04/28/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01315 |
| Federal ID | WY01315 |
| More Info | State Dam Safety Program |