Pleasant Valley No. 2 dam
Pleasant Valley No. 2
Pleasant Valley No. 2, also known as Judy Pond, is a private earth dam located in Winona, Minnesota, designed by the USDA NRCS and completed in 1968. This dam serves the primary purpose of flood risk reduction for the Pleasant Valley Creek and surrounding area, with a height of 32 feet and a length of 500 feet. The dam has a NID storage capacity of 32.2 acre-feet and a maximum discharge rate of 749 cubic feet per second, making it a significant structure in the region.
Managed by the Minnesota Department of Natural Resources, Pleasant Valley No. 2 is regulated and inspected regularly to ensure its continued effectiveness and safety. The dam is categorized as having a significant hazard potential, but its condition is assessed as satisfactory, with the last inspection in May 2019. Despite its moderate risk level, there are currently no specific risk management measures or emergency action plans in place for this dam, highlighting the need for continued monitoring and preparedness in the face of potential hazards.
Overall, Pleasant Valley No. 2 stands as a vital infrastructure for flood control in the region, serving as a key component in managing water resources and mitigating risks associated with potential flooding events. Its strategic location, design, and regular maintenance ensure that it continues to uphold its critical function in protecting the surrounding community and environment from the impacts of excess water flow.
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 Pleasant Valley No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mississippi River At Winona | 28,600 cfs | → |
| Root River Near Houston | 4,380 cfs | → |
| Trempealeau River At Dodge | 656 cfs | → |
| South Fork Root River Near Houston | 344 cfs | → |
| Black River Near Galesville | 1,030 cfs | → |
| La Crosse River Near La Crosse | 588 cfs | → |
About Pleasant Valley No. 2
Where does the data for Pleasant Valley 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 Significant 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.