Speltz Detention No. 2 dam
Speltz Detention No. 2
Speltz Detention No. 2, located in Rollingstone, Minnesota, along Speltz Creek, was designed by the USDA NRCS and serves as a crucial flood risk reduction structure in the area. Completed in 1961, this earth dam stands at a height of 31 feet, with a dam length of 442 feet and a storage capacity of 52 acre-feet. The dam's primary purpose is flood risk reduction, and it is regulated by the Minnesota Department of Natural Resources.
With a low hazard potential and fair condition assessment, Speltz Detention No. 2 plays a vital role in mitigating flood risks in the region. The dam has not undergone any modifications in recent years and is equipped with uncontrolled spillways and outlet gates. Despite being privately owned, the structure is subject to state regulation, inspection, and enforcement, ensuring its continued functionality and safety for the community.
Overall, Speltz Detention No. 2 stands as a testament to effective water resource management and climate adaptation measures in Minnesota. As climate change continues to pose challenges in terms of water management and flood control, structures like this earth dam play a crucial role in safeguarding communities and infrastructure from the impacts of extreme weather events. With its moderate risk assessment and ongoing monitoring, Speltz Detention No. 2 exemplifies the importance of proactive infrastructure investment in building resilience against a changing climate.
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 Speltz Detention No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River At Winona | 27,300 cfs | → |
| Zumbro River At Kellogg | 1,550 cfs | → |
| Trempealeau River At Dodge | 761 cfs | → |
| Trempealeau River At Arcadia | 700 cfs | → |
| Root River Near Pilot Mound | 566 cfs | → |
| Root River Near Houston | 855 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Speltz Detention No. 2.
Boat launches
- Mississippi River -- Lower Spring Lake Landing
- Mississippi River -- Merrick Park South
- Mississippi River -- Upper Spring Lake Landing
- Mississippi River -- Fountain City Boat Dock
- Mississippi River -- Lower Fountain City Landing
- Bartlet Lake Road Winona
Campgrounds
- John Latsch State Park
- Merrick State Park Campground
- Merrick State Park
- Prairie Island Campground
- Prairie Island City Campground
- Richard J. Dorer Sf -Snake Creek
Fishing spots
- Dacota Street Fishing Pier
- Huff Street Fishing Pier
- Franklin St. Fishing Pier
- Bigalks Creek
- Coldwater Creek
- Pine Creek
Track Speltz Detention No. 2 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 Speltz Detention No. 2
Where does the data for Speltz Detention No. 2 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 Speltz Detention No. 2.