Willow Glenn
Willow Glenn is an earth dam located in Johnson County, Wyoming, built in 1959. It carries a Low hazard potential classification and has a fair condition assessment.
About Willow Glenn
The primary purpose of Willow Glenn is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Roduner Cattle, Inc. (private). It impounds the Beaver Creek near Arvada.
The dam stands 30 feet tall and stretches 1,250 feet across, creates a reservoir covering 19 acres, and has a maximum storage capacity of 280 acre-feet. Completed in 1959, 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 06/06/2023.
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Location
| State | Wyoming |
| County | Johnson |
| Nearest City | Arvada |
| River/Stream | Beaver Creek |
| Coordinates | 43.99278, -106.74944 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 1,250 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 280 acre-ft |
| Max Storage | 280 acre-ft |
| Normal Storage | 165 acre-ft |
| Surface Area | 19 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | RODUNER CATTLE, INC. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/06/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY00712 |
| Federal ID | WY00712 |
| More Info | State Dam Safety Program |