Tewaukon Ws-T-7 dam
Tewaukon Ws-T-7
Tewaukon Ws-T-7, also known as Nelson, is a dam located in Sargent County, North Dakota, along the Wild Rice River. Constructed in 1961 by the USDA NRCS, this earth dam stands at a height of 40.6 feet and has a structural height of 50 feet, with a length of 650 feet. The primary purpose of this dam is flood risk reduction, serving as a crucial infrastructure for managing water resources in the area.
Owned by the local government, Tewaukon Ws-T-7 is regulated by the North Dakota State Water Commission (NDSWC) and is subject to state permitting, inspection, and enforcement. With a storage capacity of 411.1 acre-feet and a normal storage of 24.9 acre-feet, this dam plays a significant role in flood control and water management in the region. Despite being classified as having a significant hazard potential, the condition of the dam is currently not rated, highlighting the importance of regular inspections and maintenance to ensure its structural integrity.
With a spillway width of 125 feet and an uncontrolled spillway type, Tewaukon Ws-T-7 is equipped with one other controlled outlet gate. Although the dam is not rated for its condition, it is considered to have a moderate risk level. As climate change continues to impact water resources and increase the frequency and intensity of extreme weather events, the role of dams like Tewaukon Ws-T-7 becomes increasingly crucial in mitigating flood risks and ensuring the safety and resilience of communities in the area.
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 Tewaukon Ws-T-7 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wild Rice River Nr Rutland | 56 cfs | → |
| Sheyenne River At Lisbon | 298 cfs | → |
| Bear Creek Nr Oakes | 16 cfs | → |
| James River At Nd-Sd State Line | 581 cfs | → |
| Little Minnesota River Near Peever | 60 cfs | → |
| Antelope Creek At Dwight | 24 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Tewaukon Ws-T-7.
Track Tewaukon Ws-T-7 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 Tewaukon Ws-T-7
Where does the data for Tewaukon Ws-T-7 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 Significant 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 Tewaukon Ws-T-7.