Bunker Butte
Bunker Butte is an earth dam located in Campbell County, Wyoming, built in 1956. It carries a Low hazard potential classification and has a fair condition assessment.
About Bunker Butte
The primary purpose of Bunker Butte is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ryan Land & Livestock (private). It impounds the Bunker Butte Draw near Powderville, Mt.
The dam stands 30 feet tall and stretches 465 feet across, creates a reservoir covering 5 acres, and has a maximum storage capacity of 68 acre-feet. Completed in 1956, 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 05/22/2024.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | Powderville, Mt |
| River/Stream | Bunker Butte Draw |
| Coordinates | 44.82583, -105.24222 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 465 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 68 acre-ft |
| Max Storage | 68 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 5 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | RYAN LAND & LIVESTOCK |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/22/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00909 |
| Federal ID | WY00909 |
| More Info | State Dam Safety Program |