Walling Subwatershed Sta 77+50 #1 dam
Walling Subwatershed Sta 77+50 #1
Located in Woodbury County, Iowa, the Walling Subwatershed Sta 77+50 #1 serves multiple purposes, including fire protection, stock maintenance, and small fish pond management. Built in 1953, this earth dam stands at a height of 48 feet and stretches for 550 feet, with a storage capacity of 95 acre-feet. Situated along the TR-Little Sioux River, this dam plays a crucial role in flood risk reduction for the surrounding area.
Managed by the USDA NRCS and regulated by the Iowa DNR, this dam has a low hazard potential and is currently deemed to be in "not rated" condition. Despite its moderate risk assessment score of 3, the Walling Subwatershed Sta 77+50 #1 has not undergone recent inspections or condition assessments. With a drainage area of 0.33 square miles and a surface area of 4.2 acres, this dam provides essential water resource management for the community of OTO and beyond.
Even though this dam is uncontrolled by a spillway, the Walling Subwatershed Sta 77+50 #1 remains a vital infrastructure for maintaining water resources and mitigating flood risks in the region. As climate change continues to impact water availability and extreme weather events, the importance of well-maintained dams like this one cannot be overstated for ensuring the resilience of local communities and ecosystems in the face of a changing climate.
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 Walling Subwatershed Sta 77+50 #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Sioux River At Correctionville | 1,340 cfs | → |
| Maple River At Mapleton | 264 cfs | → |
| West Fork Ditch At Hornick | 80 cfs | → |
| Little Sioux River Near Turin | 1,590 cfs | → |
| Monona-Harrison Ditch Near Turin | 193 cfs | → |
| Floyd River At James | 314 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Walling Subwatershed Sta 77+50 #1.
Boat launches
Track Walling Subwatershed Sta 77+50 #1 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 Walling Subwatershed Sta 77+50 #1
Where does the data for Walling Subwatershed Sta 77+50 #1 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 Walling Subwatershed Sta 77+50 #1.