Stonebridge
Stonebridge is an earth dam located in Park County, Wyoming, built in 1905. It carries a Significant hazard potential classification and has a fair condition assessment.
About Stonebridge
The primary purpose of Stonebridge is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ptarmigan Partners Llc (private). It impounds the Whit Creek Offstream near Wapati.
The dam stands 24 feet tall and stretches 685 feet across, creates a reservoir covering 63 acres, has a maximum storage capacity of 822 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1905, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 06/07/2022.
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Location
| State | Wyoming |
| County | Park |
| Nearest City | Wapati |
| River/Stream | Whit Creek Offstream |
| Coordinates | 44.44300, -109.42150 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 685 ft |
| Year Completed | 1905 (121 years old) |
Storage & Hydraulics
| NID Storage | 822 acre-ft |
| Max Storage | 822 acre-ft |
| Normal Storage | 505 acre-ft |
| Surface Area | 63 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 776 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | PTARMIGAN PARTNERS LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 06/07/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01107 |
| Federal ID | WY01107 |
| More Info | State Dam Safety Program |