Windy Hill Subwatershed Site 3d-2 dam
Windy Hill Subwatershed Site 3d-2
Windy Hill Subwatershed Site 3d-2 is a local government-owned structure located in Woodbury County, Iowa, with a primary purpose of serving as a fire protection, stock, or small fish pond, as well as for flood risk reduction. This earth dam was completed in 1975 and has a height of 33 feet, with a storage capacity of 137 acre-feet. Situated on the TR-West Fork Little Sioux river, this dam covers a surface area of 8 acres and has a drainage area of 0.62 square miles.
Managed by the USDA NRCS, Windy Hill Subwatershed Site 3d-2 is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place. The structure has a low hazard potential and a moderate risk assessment rating of 3. While the condition assessment is currently not rated, the dam's risk management measures and emergency action plan status are not specified. With its location in Rollly Springs and association with the Omaha District, this site plays a crucial role in water resource management and climate resilience efforts in the region.
For water resource and climate enthusiasts, Windy Hill Subwatershed Site 3d-2 offers a fascinating case study in local government ownership and management of a crucial earth dam structure. With its multiple purposes of fire protection, stock, and small fish pond maintenance, as well as flood risk reduction, this site exemplifies the intersection of human needs and environmental stewardship. The dam's history, design, and ongoing regulatory oversight by the Iowa DNR provide valuable insights into sustainable water management practices and infrastructure resilience in the face of changing climatic conditions.
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 Windy Hill Subwatershed Site 3d-2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| West Fork Ditch At Hornick | 80 cfs | → |
| Missouri River At Sioux City | 26,000 cfs | → |
| Little Sioux River At Correctionville | 1,400 cfs | → |
| Floyd River At James | 323 cfs | → |
| Omaha Cr At Homer | 31 cfs | → |
| Maple River At Mapleton | 264 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Windy Hill Subwatershed Site 3d-2.
Boat launches
Campgrounds
Track Windy Hill Subwatershed Site 3d-2 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 Windy Hill Subwatershed Site 3d-2
Where does the data for Windy Hill Subwatershed Site 3d-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 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 Windy Hill Subwatershed Site 3d-2.