Sheriff
Sheriff is an earth dam located in Rio Blanco County, Colorado, built in 1955. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Sheriff
The primary purpose of Sheriff is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Town Of Oak Creek (tom Holiday, Director Of Public (local government). It impounds the Trout Creek near Milner.
The dam stands 72 feet tall and stretches 630 feet across, creates a reservoir covering 40 acres, has a maximum storage capacity of 1,450 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1955, 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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 10/04/2022.
At 72 feet, this dam is taller than 96% 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 Colorado 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 | Colorado |
| County | Rio Blanco |
| Nearest City | Milner |
| River/Stream | Trout Creek |
| Coordinates | 40.14889, -107.13723 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 72 ft |
| Dam Height | 47 ft |
| Dam Length | 630 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 1,450 acre-ft |
| Max Storage | 1,450 acre-ft |
| Normal Storage | 987 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 2,460 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | TOWN OF OAK CREEK (TOM HOLIDAY, DIRECTOR OF PUBLIC |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 10/04/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO01015 |
| Federal ID | CO01015 |
| More Info | State Dam Safety Program |