Antelope Creek 20-a
Antelope Creek 20-a is an earth dam located in Sheridan County, Nebraska, built in 1964. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Antelope Creek 20-a
The primary purpose of Antelope Creek 20-a 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 City Of Gordon (local government). It impounds the Tr-antelope Creek near Gordon.
The dam stands 24 feet tall and stretches 562 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 450 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1964, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 06/05/2024.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Nebraska dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Nebraska |
| County | Sheridan |
| Nearest City | Gordon |
| River/Stream | Tr-antelope Creek |
| Coordinates | 42.79557, -102.23225 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 562 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 450 acre-ft |
| Max Storage | 450 acre-ft |
| Normal Storage | 42 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 3,400 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Gordon |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/05/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NE00793 |
| Federal ID | NE00793 |
| More Info | State Dam Safety Program |