Boller Pool dam
Boller Pool
Boller Pool, located in Minnesota City, Minnesota, is a privately owned earth dam designed by the USDA NRCS in 1970 for flood risk reduction along Rollingstone Creek. Standing at 30 feet tall and 537 feet long, this dam has a storage capacity of 125 acre-feet and a drainage area of 1.1 square miles. With a maximum discharge of 250 cubic feet per second and a low hazard potential, Boller Pool plays a crucial role in managing water flow and mitigating flood risks in the area.
Managed by the Minnesota Department of Natural Resources, Boller Pool is subject to state regulation, inspection, and enforcement to ensure its structural integrity and functionality. The dam, primarily designed for flood risk reduction, is classified as a buttress earth dam with uncontrolled spillways and outlet gates. A fair condition assessment in 2010 and moderate risk assessment indicate the need for ongoing monitoring and maintenance to uphold the dam's effectiveness in protecting the surrounding area from potential flooding events.
In the event of an emergency, the dam's emergency action plan and inundation maps are essential tools for risk management and coordination with relevant authorities. With a history of regular inspections and a designated inspection frequency of 8 years, Boller Pool remains a vital component of the local water resource infrastructure, demonstrating its importance in safeguarding the community against the impacts of climate variability and extreme weather events.
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 Boller Pool -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River At Winona | 28,600 cfs | → |
| Trempealeau River At Dodge | 656 cfs | → |
| Zumbro River At Kellogg | 1,550 cfs | → |
| Trempealeau River At Arcadia | 543 cfs | → |
| Root River Near Pilot Mound | 1,870 cfs | → |
| Root River Near Houston | 4,380 cfs | → |
About Boller Pool
Where does the data for Boller Pool 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 below 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.
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.