Gunderson-Marmsoler Detention dam
Gunderson-Marmsoler Detention
Gunderson-Marmsoler Detention, located in Winona, Minnesota, is a privately owned earth dam designed by the USDA NRCS for flood risk reduction. Completed in 1972, this structure stands at 34 feet tall and stretches 331 feet in length along the Big Trout Creek-TR. With a low hazard potential and satisfactory condition assessment, this detention facility has a storage capacity of 16.3 acre-feet and a drainage area of 0.5 square miles.
Maintained by the Minnesota Department of Natural Resources, this detention serves a critical role in mitigating flood risks in the region. With uncontrolled spillways and outlets, it is equipped to handle a maximum discharge of 160 cubic feet per second. The dam's risk assessment rates it as moderate, highlighting the importance of ongoing monitoring and risk management measures to ensure its effectiveness in protecting the surrounding areas from potential inundation events.
Owned by a private entity, Gunderson-Marmsoler Detention plays a vital role in the flood risk reduction efforts in the region. With its earth construction and buttress core type, this structure exemplifies the collaboration between private landowners and government agencies in safeguarding water resources and enhancing climate resilience. As climate change continues to impact water systems, facilities like Gunderson-Marmsoler Detention will be instrumental in adapting to and mitigating the challenges posed by 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 Gunderson-Marmsoler Detention -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River At Winona | 38,900 cfs | → |
| Black River Near Galesville | 1,290 cfs | → |
| Trempealeau River At Dodge | 593 cfs | → |
| Root River Near Houston | 829 cfs | → |
| La Crosse River Near La Crosse | 425 cfs | → |
| South Fork Root River Near Houston | 182 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Gunderson-Marmsoler Detention.
Boat launches
- Mississippi River -- Trempealeau Landing
- Long Lake -- Landing
- Mississippi River -- Round Lake -- Access
- Trempealeau River -- Perrot State Park
- River Street Dakota
- Black River -- Access Nr State Hwy 35
Campgrounds
- Pla-Mor Campground
- Great River Bluffs State Park
- Perrot State Park
- Perrot State Park Campground
- Group Tent Campsite
- Cart In Sites
Fishing spots
- Franklin St. Fishing Pier
- Huff Street Fishing Pier
- Dacota Street Fishing Pier
- New Albin Big Lake
- Pine Creek
- French Creek
Track Gunderson-Marmsoler Detention 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 Gunderson-Marmsoler Detention
Where does the data for Gunderson-Marmsoler Detention 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 Gunderson-Marmsoler Detention.