Blockton Watershed Site W-3 dam
Blockton Watershed Site W-3
Blockton Watershed Site W-3, located in Blockton, Iowa, is a vital water resource managed by the local government and designed by the USDA NRCS. This earth dam, completed in 1970, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a dam height of 22 feet and a storage capacity of 157 acre-feet, it covers a surface area of 8.9 acres and has a drainage area of 0.55 square miles.
The dam, situated on the TR-Platte River, is regulated by the Iowa DNR and is inspected, permitted, and enforced by the state agency. Despite its low hazard potential and moderate risk assessment, the condition of the dam is currently not rated. The dam features an uncontrolled spillway and is primarily constructed with soil as its foundation. With its strategic location and multiple functions, Blockton Watershed Site W-3 plays a crucial role in water management, flood control, and environmental conservation in Taylor County, Iowa.
For water resource and climate enthusiasts, Blockton Watershed Site W-3 offers a fascinating case study in sustainable water infrastructure development. As a key component of the local water management system, this dam showcases the importance of multi-purpose structures in enhancing community resilience against floods, ensuring water availability for irrigation, livestock, and firefighting, and promoting biodiversity through the creation of small fish ponds. With its strategic design, effective regulation, and moderate risk management measures, Blockton Watershed Site W-3 stands as a model for integrated water resource management in the region.
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 Blockton Watershed Site W-3 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| East Fork 102 River At Bedford | 0 cfs | → |
| One Hundred And Two River At Maryville | 1,750 cfs | → |
| Nodaway River At Clarinda | 1,080 cfs | → |
| East Fork Big Creek Near Bethany | 411 cfs | → |
| Nodaway River Near Burlington Jct | 2,430 cfs | → |
| Thompson River At Davis City | 2,350 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Blockton Watershed Site W-3.
Boat launches
Track Blockton Watershed Site W-3 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 Blockton Watershed Site W-3
Where does the data for Blockton Watershed Site W-3 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 Blockton Watershed Site W-3.