Sulphur Creek
Sulphur Creek is an earth dam located in Uinta County, Wyoming, built in 1964. It carries a High hazard potential classification and has a fair condition assessment.
About Sulphur Creek
The primary purpose of Sulphur Creek is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by City Of Evanston (local government). It impounds the Sulphur Creek near Evanston.
The dam stands 85 feet tall and stretches 4,725 feet across, creates a reservoir covering 632 acres, has a maximum storage capacity of 19,775 acre-feet, and collects water from a drainage area of 62 square miles. Completed in 1964, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 07/24/2023.
At 85 feet, this dam is taller than 97% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Wyoming dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Uinta |
| Nearest City | Evanston |
| River/Stream | Sulphur Creek |
| Coordinates | 41.15379, -110.83352 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 85 ft |
| Dam Height | 85 ft |
| Dam Length | 4,725 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 19,775 acre-ft |
| Max Storage | 19,775 acre-ft |
| Normal Storage | 19,775 acre-ft |
| Surface Area | 632 acres |
| Drainage Area | 62 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | CITY OF EVANSTON |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 07/24/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WY01196 |
| Federal ID | WY01196 |
| More Info | State Dam Safety Program |