Banks Dam dam
Banks Dam
Banks Dam, located in Big Sioux River, Plymouth County, Iowa, is a privately owned structure designed by USDA NRCS and completed in 1967. With a height of 35 feet and a length of 559 feet, this earth dam serves multiple purposes including fire protection, stock, and small fish pond. The dam has a storage capacity of 152 acre-feet, with a normal storage of 50 acre-feet and a surface area of 7.3 acres.
Managed by the Iowa Department of Natural Resources, Banks Dam is regulated, permitted, inspected, and enforced by state authorities. The dam has a low hazard potential and a moderate risk assessment rating. Although the condition assessment is currently not rated, the dam meets regulatory guidelines and has not experienced any significant modifications since its completion. With a controlled spillway type and no outlet gates, Banks Dam ensures the safety and stability of the surrounding area while providing valuable water resources for various uses.
Water resource and climate enthusiasts will appreciate Banks Dam for its role in maintaining water supply, supporting wildlife, and protecting against fire hazards in the region. The dam's strategic location along the 1023 TR-Broken Kettle Creek contributes to flood control and water management efforts in the area. As a vital infrastructure for the community, Banks Dam exemplifies the importance of sustainable water resource management and climate resilience in a changing environment.
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 Banks Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Perry Creek Near Milnerville | 25 cfs | → |
| Floyd River At James | 314 cfs | → |
| Missouri River At Sioux City | 26,100 cfs | → |
| Big Sioux River At Akron | 1,060 cfs | → |
| Omaha Cr At Homer | 30 cfs | → |
| Vermillion River Nr Vermillion Sd | 41 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Banks Dam.
Boat launches
- 220th Street Plymouth County
- State Highway 3 Plymouth County
- Ponca
- Scenic Park S Sioux City
- 180th Street Plymouth County
- Bacon Creek Sioux City
Track Banks Dam 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 Banks Dam
Where does the data for Banks Dam 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 Banks Dam.