Evenson dam
Evenson
Evenson is a privately owned dam located in Canton, South Dakota, along the TR-BIG SIOUX river. Built in 1970, this earth dam stands at 27 feet high and spans 375 feet in length, with a storage capacity of 44 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections and enforcement measures to ensure its safety and compliance with state regulations.
Despite its low hazard potential, Evenson has been assessed with a moderate risk rating of 3, indicating some level of potential risk that should be managed. While the dam's condition has not been rated, it is reassuring to note that it meets state permitting and inspection requirements. The dam's spillway is uncontrolled, with a maximum discharge capacity of 579 cubic feet per second, adding to its functionality as a flood control structure within the St. Paul District.
For water resource and climate enthusiasts, Evenson provides a fascinating case study of a privately owned dam in South Dakota that plays a crucial role in managing water flow along the TR-BIG SIOUX river. With its moderate risk rating and low hazard potential, the dam serves as an important piece of infrastructure in the region, demonstrating the need for ongoing monitoring and management to ensure its continued safety and effectiveness in water resource management.
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 Evenson -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Sioux R At Sioux Falls Sd | 26 cfs | → |
| Big Sioux R At North Cliff Ave At Sioux Falls Sd | 350 cfs | → |
| Skunk Cr At Sioux Falls Sd | 3 cfs | → |
| Split Rock Cr At Corson Sd | 11 cfs | → |
| Rock River Below Tom Creek At Rock Rapids | 93 cfs | → |
| Rock River Near Rock Valley | 486 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Evenson.
Boat launches
- Copperwood Court Lincoln County
- Wall Lake Boat Ramp
- Split Rock Park Road Garretson
- 310th Street Sioux County
- Mccook County
Campgrounds
- Camp Jellystone
- West Ball Park Campground
- Foote City Park
- Westside City Park
- Island Parck
- Blue Mound State Park Cart-In
More reservoirs
Track Evenson 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 Evenson
Where does the data for Evenson 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 Low 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 Evenson.