Twelve Mile Creek Watershed Site D-35 dam
Twelve Mile Creek Watershed Site D-35
Twelve Mile Creek Watershed Site D-35 is a crucial water resource located in Union, Iowa, owned and operated by the local government. This site, designed by USDA NRCS, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. Completed in 1988, the earth dam stands at a height of 38 feet and has a storage capacity of 530 acre-feet, with a drainage area of 1.51 square miles.
With a surface area of 20 acres, this low hazard potential dam on Twelve Mile Creek provides essential water management capabilities in the region. Despite not being rated for its condition assessment, the site is state-regulated, inspected, and permitted, ensuring its functionality and safety. Located in WESTERVILLE, Iowa, this dam plays a critical role in protecting the surrounding area from potential flooding and providing water for various purposes.
Managed by the Natural Resources Conservation Service, Twelve Mile Creek Watershed Site D-35 is part of the larger water infrastructure network in the region. With a moderate risk assessment score, this site highlights the importance of sustainable water resource management and climate resilience in the face of changing environmental conditions. Enthusiasts interested in water resources and climate will find this site to be a fascinating example of how infrastructure plays a crucial role in safeguarding communities and ecosystems.
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 Twelve Mile Creek Watershed Site D-35 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Thompson River At Davis City | 8,610 cfs | → |
| East Fork 102 River At Bedford | 1 cfs | → |
| Raccoon River At Van Meter | 2,980 cfs | → |
| North River Near Norwalk | 1,200 cfs | → |
| South River Near Ackworth | 1,990 cfs | → |
| Middle River Near Indianola | 1,120 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Twelve Mile Creek Watershed Site D-35.
Track Twelve Mile Creek Watershed Site D-35 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 Twelve Mile Creek Watershed Site D-35
Where does the data for Twelve Mile Creek Watershed Site D-35 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 Twelve Mile Creek Watershed Site D-35.