Warren St Detention dam
Warren St Detention
Warren St Detention, located in Mankato, Minnesota, is a crucial earth dam structure designed by BARR ENG to manage flood risk along the Minnesota River. Completed in 1997, this dam stands at a height of 45 feet and spans 150 feet in length, with a primary purpose of flood risk reduction. With a storage capacity of 30 acre-feet and a normal storage level of 1.6 feet, the dam plays a vital role in protecting the surrounding Blue Earth County area from potential flooding events.
The structure's hazard potential is classified as low, with a fair condition assessment as of June 2016. The dam features an uncontrolled spillway type with a width of 6 feet, allowing for a maximum discharge of 50 cubic feet per second. Despite its moderate risk rating, Warren St Detention has not been modified in recent years and has demonstrated its effectiveness in managing floodwaters. The dam is inspected every four years to ensure its continued functionality and safety for the community.
Owned and regulated by the local government with oversight from the Minnesota Department of Natural Resources, Warren St Detention serves as a critical infrastructure asset for flood control in the region. Its strategic location and design make it a key component in the overall water resource management system along the Minnesota River, contributing to the resilience of the area against potential climate-related challenges.
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 Warren St Detention -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Minnesota River At Mankato | 11,300 cfs | → |
| Le Sueur River Near Rapidan | 3,650 cfs | → |
| Blue Earth River Near Rapidan | 3,920 cfs | → |
| Watonwan River Near Garden City | 1,380 cfs | → |
| Little Cottonwood River Near Courtland | 103 cfs | → |
| Cottonwood River Near New Ulm | 495 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Warren St Detention.
Boat launches
- Park Road Madison Lake
- T-324 23201, Madison Lake
- T-750 Blue Earth County
- 232nd Lane Madison Lake
- 622nd Lane 22399, Blue Earth County
- Le Sueur County
Track Warren St 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 Warren St Detention
Where does the data for Warren St 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 Warren St Detention.