Tisdale No. 3
Tisdale No. 3 is an earth dam located in Campbell County, Wyoming, built in 1990. It carries a Low hazard potential classification and has a fair condition assessment.
About Tisdale No. 3
The primary purpose of Tisdale No. 3 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Peabody Caballo Mining, Llc (private). It impounds the Tisdale Creek near Keyhole Reservoir.
The dam stands 30 feet tall and stretches 900 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 107 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1990, the structure is 36 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 09/30/2021.
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Location
| State | Wyoming |
| County | Campbell |
| Nearest City | Keyhole Reservoir |
| River/Stream | Tisdale Creek |
| Coordinates | 44.11510, -105.34560 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 20 ft |
| Dam Length | 900 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 107 acre-ft |
| Max Storage | 107 acre-ft |
| Normal Storage | 57 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 970 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | PEABODY CABALLO MINING, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 09/30/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01983 |
| Federal ID | WY01983 |
| More Info | State Dam Safety Program |