Wyo. Refining Containment Pond is an earth dam located in Weston County, Wyoming, built in 1980. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 28 ft28 ft tall and 2,050 ft long, taller than 62% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Wyo. Refining Containment Pond
The primary purpose of Wyo. Refining Containment Pond is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Wyoming Refining Co. (private). It impounds the Windmill Draw.
The dam stands 28 feet tall and stretches 2,050 feet across, creates a reservoir covering 29 acres, and has a maximum storage capacity of 297 acre-feet. Completed in 1980, the structure is 46 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 05/01/2025.
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Location
| State | Wyoming |
| County | Weston |
| River/Stream | Windmill Draw |
| Coordinates | 43.81800, -104.22050 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 2,050 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 297 acre-ft |
| Max Storage | 297 acre-ft |
| Normal Storage | 152 acre-ft |
| Surface Area | 29 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Wyoming Refining Co. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/01/2025 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01973 |
| Federal ID | WY01973 |
| More Info | State Dam Safety Program |