Jefferson County Roadgrade Dam 24-72-11 dam
Jefferson County Roadgrade Dam 24-72-11
Located in Jefferson County, Iowa, the Roadgrade Dam 24-72-11, also known as the Big Cedar Creek Dam, was completed in 1984 by the USDA NRCS. This earth dam stands at a height of 25 feet and spans 800 feet in length, with a storage capacity of 64 acre-feet for flood control purposes. The dam is regulated by the Iowa Department of Natural Resources and is inspected regularly to ensure its structural integrity and safety.
Despite its low hazard potential, the Roadgrade Dam plays a crucial role in managing the flow of the TR- Big Cedar Creek, protecting the surrounding area from potential flooding. The dam has a moderate risk assessment rating, indicating that it is adequately maintained and managed to mitigate any potential risks. With a surface area of 3.3 acres and a drainage area of 0.21 square miles, the dam serves as a vital infrastructure for water resource management in the region.
Owned by the local government, the Roadgrade Dam 24-72-11 serves as a key component of the water management system in Jefferson County. With its uncontrolled spillway and soil foundation, the dam is designed to withstand various hydraulic pressures and provide essential flood protection for the community of Big Cedar Creek. Climate and water resource enthusiasts can appreciate the strategic design and maintenance efforts put into this critical infrastructure for ensuring the safety and well-being of the surrounding area.
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 Jefferson County Roadgrade Dam 24-72-11 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Des Moines River At Ottumwa | 21,400 cfs | → |
| North Skunk River Near Sigourney | 3,630 cfs | → |
| Des Moines River At Keosauqua | 22,200 cfs | → |
| Cedar Creek Near Oakland Mills | 2,420 cfs | → |
| Fox River At Bloomfield | 7 cfs | → |
| Big Creek Near Mt. Pleasant | 148 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Jefferson County Roadgrade Dam 24-72-11.
Boat launches
- Cliffland Road Wapello County
- County Road V5g Keokuk County
- Dogwood Avenue Washington County
- W15 / 330th Avenue Keokuk County
- Jefferson Street Viaduct Ottumwa
- Van Buren County
Track Jefferson County Roadgrade Dam 24-72-11 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 Jefferson County Roadgrade Dam 24-72-11
Where does the data for Jefferson County Roadgrade Dam 24-72-11 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 Jefferson County Roadgrade Dam 24-72-11.