Oahe Dam - Fort Yates Flood Protection Project dam
Oahe Dam - Fort Yates Flood Protection Project
The Oahe Dam - Fort Yates Flood Protection Project, also known as Lake Oahe, is a federal project located in South Dakota along the Missouri River. Completed in 1966, this earth dam stands at a structural height of 245 feet and has a hydraulic height of 200 feet. The dam's primary purpose is flood risk reduction, but it also serves for hydroelectric power generation, irrigation, navigation, and recreation. With a storage capacity of 23.6 million acre-feet, the dam covers a surface area of 376,000 acres and has a drainage area of 243,490 square miles.
Despite its high hazard potential, the US Army Corps of Engineers (USACE) actively manages the flood risks associated with the Oahe Dam. Through regular inspections, maintenance, and monitoring, USACE ensures the dam's structural integrity and readiness to respond to emergencies. The agency also collaborates with local emergency managers to develop evacuation plans and keep the public informed about potential risks. With a comprehensive risk management strategy in place, the Oahe Dam continues to play a crucial role in protecting the surrounding communities from potential flood events along the Missouri River.
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 Oahe Dam - Fort Yates Flood Protection Project -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Beaver Creek Bl Linton | 32 cfs | → |
| Cannonball River At Breien | 49 cfs | → |
| Oak Cr Near Wakpala Sd | 10 cfs | → |
| Grand R At Little Eagle Sd | 64 cfs | → |
| Cedar Creek Nr Raleigh | 20 cfs | → |
| Cannonball River Nr Raleigh | 16 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Oahe Dam - Fort Yates Flood Protection Project.
Boat launches
- Proposal Avenue Sioux County
- 91st Street Southwest Emmons County
- Emmons County
- 88th Street Southwest Emmons County
- State Highway 1804 Emmons County
Track Oahe Dam - Fort Yates Flood Protection Project 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 Oahe Dam - Fort Yates Flood Protection Project
Where does the data for Oahe Dam - Fort Yates Flood Protection Project 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 Oahe Dam - Fort Yates Flood Protection Project.