Antelope dam
Antelope
Antelope, located in Todd, South Dakota, is a concrete dam constructed in 1939 by the Bureau of Indian Affairs for the primary purpose of irrigation. Managed by the Department of the Interior's Bureau of Indian Affairs, Antelope serves as a vital water resource on Antelope Creek. With a structural height of 25 feet and a length of 2050 feet, the dam plays a crucial role in controlling water flow and ensuring efficient irrigation in the region.
Despite its age, Antelope is considered to have a high hazard potential and a very high risk assessment rating. While the condition assessment is currently not available, the last inspection in 2012 revealed the need for regular monitoring and maintenance. The emergency action plan (EAP) for the dam was last revised in 2005, and the dam is inspected every 5 years to assess its safety and integrity. With Dusty Johnson (R) as the representative for the area, the management and regulation of Antelope are under the jurisdiction of the Bureau of Indian Affairs, emphasizing the importance of sustainable water resource management in the region.
As a crucial infrastructure for irrigation and water management in South Dakota, Antelope Dam stands as a testament to the importance of maintaining and monitoring aging water structures. With its controlled spillway and primary purpose of irrigation, the dam plays a pivotal role in the region's agricultural activities. However, its high hazard potential and risk assessment highlight the need for continued vigilance and proactive measures to ensure the safety and efficiency of this vital water resource in the face of changing climate patterns and increasing water demand.
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 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little White R Near Rosebud Sd | 137 cfs | → |
| Little White R Below White River Sd | 107 cfs | → |
| Keya Paha R Near Keyapaha Sd | 24 cfs | → |
| White River Near White River | 31 cfs | → |
| Niobrara River Near Sparks | 734 cfs | → |
| Little White R Near Vetal Sd | 77 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Antelope.
More reservoirs
Track Antelope 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
Where does the data for Antelope 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.