Rocky Branch Creek Watershed Site C-3a dam
Rocky Branch Creek Watershed Site C-3a
Rocky Branch Creek Watershed Site C-3a is a low hazard potential dam located in Jefferson, Iowa, owned by the local government and regulated by the Iowa Department of Natural Resources. This Earth dam, completed in 1969, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a maximum storage capacity of 12 acre-feet, it covers a surface area of 1 acre and drains a 0.09 square mile watershed.
Managed by the USDA NRCS, this dam on TR- Rocky Branch Creek has a moderate risk assessment rating and has not been rated for its condition. With a spillway type of uncontrolled, the dam has a height of 25 feet and is primarily used for water resource management in the area. While it has not been inspected recently, it is important to note that the dam's emergency action plan status, inundation maps, and risk management measures are currently unknown. Overall, Rocky Branch Creek Watershed Site C-3a provides critical water resource functions for the Rome community.
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 Rocky Branch Creek Watershed Site C-3a -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Cedar Creek Near Oakland Mills | 55 cfs | → |
| Big Creek Near Mt. Pleasant | 7 cfs | → |
| North Skunk River Near Sigourney | 319 cfs | → |
| Des Moines River At Keosauqua | 7,370 cfs | → |
| English River At Kalona | 228 cfs | → |
| Iowa River Near Lone Tree | 3,230 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Rocky Branch Creek Watershed Site C-3a.
Boat launches
- Dogwood Avenue Washington County
- W15 / 330th Avenue Keokuk County
- County Road V5g Keokuk County
- Van Buren County
- Vine Avenue Washington County
- Cliffland Road Wapello County
Track Rocky Branch Creek Watershed Site C-3a 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 Rocky Branch Creek Watershed Site C-3a
Where does the data for Rocky Branch Creek Watershed Site C-3a 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 Rocky Branch Creek Watershed Site C-3a.