Jenson
Jenson is an earth dam located in Fremont County, Wyoming, built in 1979. It carries a Low hazard potential classification and has a fair condition assessment.
About Jenson
The primary purpose of Jenson 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 Kennecott Uranium Company & Wyoming Coal Resources Company (private). It impounds the Antelope Creek near Hwy. 287/789.
The dam stands 44 feet tall and stretches 1,200 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 212 acre-feet. Completed in 1979, the structure is 47 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 05/16/2023.
At 44 feet, this dam is taller than 90% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Wyoming |
| County | Fremont |
| Nearest City | Hwy. 287/789 |
| River/Stream | Antelope Creek |
| Coordinates | 42.32750, -107.79278 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 1,200 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 212 acre-ft |
| Max Storage | 212 acre-ft |
| Normal Storage | 157 acre-ft |
| Surface Area | 11 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | KENNECOTT URANIUM COMPANY & WYOMING COAL RESOURCES COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/16/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | WY01715 |
| Federal ID | WY01715 |
| More Info | State Dam Safety Program |