Hadler Detention dam
Hadler Detention
Hadler Detention, located in Mazeppa, Minnesota, is a private earth dam designed by NRCS in 1981 for flood risk reduction along Trout Brook. The dam stands at 30 feet tall with a length of 210 feet, providing a storage capacity of 35.6 acre-feet to manage runoff in the area. The dam is state-regulated and undergoes regular inspections, with a low hazard potential and satisfactory condition assessment as of the last inspection in 2016.
Owned privately, Hadler Detention serves as a critical infrastructure in Goodhue County for mitigating flood risks and protecting surrounding areas from potential inundation. Its primary purpose aligns with flood risk reduction efforts, with a moderate risk assessment rating. The dam's location, design, and operational functions are integral to water resource management in the region, reflecting a commitment to climate resilience and hazard mitigation in a changing environment. As part of the broader network of water infrastructure in Minnesota, Hadler Detention plays a vital role in maintaining the safety and sustainability of the local watershed.
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 Hadler Detention -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River At Red Wing | 19,400 cfs | → |
| Cannon River At Welch | 713 cfs | → |
| South Fork Zumbro River At Rochester | 159 cfs | → |
| Zumbro River At Kellogg | 1,550 cfs | → |
| Mississippi River At Prescott | 22,200 cfs | → |
| Mississippi River Below L&D #2 At Hastings | 17,800 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hadler Detention.
Boat launches
- Route 61/Route 63 Lake City
- Mississippi River -- Hager City
- Mississippi River -- Bay City
- Mississippi River -- Stockholm
- Mississippi River -- Deer Island Landing
- Mississippi River -- Maiden Rock
Campgrounds
- Covered Bridge Park Campground
- Oronococ City Park
- Hay Creek Valley Campground
- Hok-Si-La Park Campground
- Oxbow Park Campground
- Frontenac State Park Cart-In
Fishing spots
Track Hadler 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 Hadler Detention
Where does the data for Hadler 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 Hadler Detention.