Muffie
Muffie is an earth dam located in Johnson County, Wyoming, built in 1970. It carries a Low hazard potential classification and has a fair condition assessment.
About Muffie
The primary purpose of Muffie is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Johnson-rogers Cattle Co Inc (private). It impounds the Burnett Creek near Arvada.
The dam stands 40 feet tall and stretches 1,100 feet across, creates a reservoir covering 17 acres, and has a maximum storage capacity of 284 acre-feet. Completed in 1970, the structure is well into its service life at over 50 years 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 06/21/2021.
At 40 feet, this dam is taller than 87% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Arvada |
| River/Stream | Burnett Creek |
| Coordinates | 44.21440, -106.77000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 1,100 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 284 acre-ft |
| Max Storage | 284 acre-ft |
| Normal Storage | 180 acre-ft |
| Surface Area | 17 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | JOHNSON-ROGERS CATTLE CO INC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/21/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00525 |
| Federal ID | WY00525 |
| More Info | State Dam Safety Program |