Allison 1 Cat Dam
Allison 1 Cat Dam is an earth dam located in Sheridan County, Nebraska, built in 1983. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Allison 1 Cat Dam
The primary purpose of Allison 1 Cat Dam is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by Upper Niobrara White Natural Resources District (local government). It impounds the Tr-wounded Knee Creek near Wounded Knee Sd.
The dam stands 26 feet tall and stretches 250 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1983, the structure is 43 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/20/2020.
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Location
| State | Nebraska |
| County | Sheridan |
| Nearest City | Wounded Knee Sd |
| River/Stream | Tr-wounded Knee Creek |
| Coordinates | 42.95207, -102.35990 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 24 ft |
| Dam Length | 250 ft |
| Year Completed | 1983 (43 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 37 cfs |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Upper Niobrara White Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/20/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01898 |
| Federal ID | NE01898 |
| More Info | State Dam Safety Program |