Wagner Dam dam
Wagner Dam
Wagner Dam, located in Guernsey, Iowa, is a private-owned structure designed by the USDA NRCS for grade stabilization along the Tr- North English River. Completed in 2001, this earth dam stands at 29 feet in height and spans 410 feet in length, with a storage capacity of 81 acre-feet. Its primary purpose is grade stabilization, serving to control the flow of water and prevent erosion in the surrounding area. Despite its low hazard potential, the dam is regulated, permitted, inspected, and enforced by the Iowa Department of Natural Resources to ensure its safety and compliance with state regulations.
With a moderate risk assessment rating, Wagner Dam has not been officially rated for its condition as of now. It features an uncontrolled spillway and covers a surface area of 5.9 acres, serving a drainage area of 0.22 square miles. Located within the Detroit District of the US Army Corps of Engineers, Wagner Dam plays a crucial role in managing water resources in Poweshiek County, Iowa. While it has not been modified in recent years, the dam remains an essential structure for water conservation and environmental protection 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 Wagner Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Walnut Creek Near Hartwick | 33 cfs | → |
| Big Bear Creek At Ladora | 122 cfs | → |
| Richland Creek Near Haven | 34 cfs | → |
| Iowa River Near Belle Plaine | 2,050 cfs | → |
| Salt Creek Near Elberon | 131 cfs | → |
| South Skunk River Near Oskaloosa | 1,230 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Wagner Dam.
Boat launches
- 216th Street Iowa County
- State Highway 21 Iowa County
- 360th Street Tama County
- P Avenue Tama County
- Jade Street Jasper County
- Rock Creek East Street Jasper County
Campgrounds
- Diamond Lake County Park
- Robertson Access
- Lake Iowa County Park
- Union Mills Access
- Rock Creek State Park
- Glendale Access
More reservoirs
Track Wagner 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 Wagner Dam
Where does the data for Wagner 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 Wagner Dam.