Renner
Renner is an earth dam located in Big Horn County, Wyoming, built in 1950. It carries a Low hazard potential classification and has a fair condition assessment.
About Renner
The primary purpose of Renner is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Wyoming Game And Fish Commission (state). It impounds the Buffalo Flat Creek near Manderson.
The dam stands 16 feet tall and stretches 1,050 feet across, creates a reservoir covering 70 acres, and has a maximum storage capacity of 584 acre-feet. Completed in 1950, the structure is well-established, with more than 75 years of service.
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 04/15/2025.
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Location
| State | Wyoming |
| County | Big Horn |
| Nearest City | Manderson |
| River/Stream | Buffalo Flat Creek |
| Coordinates | 44.17611, -107.50417 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 1,050 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 584 acre-ft |
| Max Storage | 584 acre-ft |
| Normal Storage | 366 acre-ft |
| Surface Area | 70 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WYOMING GAME AND FISH COMMISSION |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/15/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01059 |
| Federal ID | WY01059 |
| More Info | State Dam Safety Program |