Antelope Creek 20-A dam
Antelope Creek 20-A
Antelope Creek 20-A is a crucial flood risk reduction structure located in Sheridan, Nebraska. Constructed in 1964 by the USDA NRCS, this earth dam stands at a height of 24 feet and has a length of 562 feet. With a storage capacity of 450 acre-feet and a maximum discharge rate of 3,400 cubic feet per second, it plays a vital role in managing water flow in the area. The dam is state-regulated by the Nebraska Department of Natural Resources, with regular inspections ensuring its structural integrity.
The primary purpose of Antelope Creek 20-A is flood risk reduction, serving as a critical infrastructure for the local government. Despite its high hazard potential, the dam has been assessed as satisfactory in condition, with the last inspection conducted in June 2020. The dam's location in the TR-Antelope Creek watershed highlights its significance in protecting the surrounding areas from potential flooding events. With its efficient design and operation, Antelope Creek 20-A continues to play a key role in water resource management and climate resilience efforts in the region.
Overall, Antelope Creek 20-A stands as a testament to effective water resource management and infrastructure development in Nebraska. Managed by the Natural Resources Conservation Service, this earth dam not only provides flood risk reduction but also contributes to water storage and flow regulation in the area. With state regulation and regular inspections in place, Antelope Creek 20-A remains a vital component of the local government's strategy for mitigating the impact of extreme weather events and ensuring the safety and resilience of the community.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Antelope Creek 20-A -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| White R Nr Ne-Sd State Line | 7 cfs | → |
| Lake Cr Above Refuge Near Tuthill Sd | 26 cfs | → |
| Little White R Near Martin Sd | 17 cfs | → |
| White R Near Oglala Sd | 101 cfs | → |
| Lake Cr Below Refuge Near Tuthill Sd | 6 cfs | → |
| Little White R Near Vetal Sd | 64 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Antelope Creek 20-A.
Track Antelope Creek 20-A in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Antelope Creek 20-A
Where does the data for Antelope Creek 20-A come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Antelope Creek 20-A.