Parnell Creek Subwatershed Site 8-2 dam
Parnell Creek Subwatershed Site 8-2
Parnell Creek Subwatershed Site 8-2 is a key water resource management site located in Woodbury, Iowa, near the Missouri River. Managed by the local government and designed by USDA NRCS, this earth dam structure was completed in 1969 with a primary purpose of fire protection, stock, or small fish pond, along with flood risk reduction. With a height of 49 feet and a length of 460 feet, the dam provides a storage capacity of 202 acre-feet, serving a drainage area of 0.41 square miles.
This site, regulated by the Iowa DNR, features a spillway type of uncontrolled design, with a low hazard potential and a moderate risk assessment rating. While the condition assessment is currently not rated, the structure meets state regulatory requirements for permitting, inspection, and enforcement. The dam's storage capacity, surface area of 7 acres, and normal storage volume of 130 acre-feet contribute to its role in managing water resources in the region, ensuring adequate water supply for various purposes.
Overall, Parnell Creek Subwatershed Site 8-2 plays a vital role in water resource management, providing essential functions such as flood risk reduction and water storage for fire protection and aquatic life support. With its strategic location and design, this earth dam structure serves as a valuable asset in the sustainable management of water resources in the Woodbury County area, showcasing the importance of effective infrastructure in addressing climate-related challenges and ensuring water security for local communities.
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 Parnell Creek Subwatershed Site 8-2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Maple River At Mapleton | 314 cfs | → |
| West Fork Ditch At Hornick | 80 cfs | → |
| Little Sioux River At Correctionville | 1,600 cfs | → |
| Little Sioux River Near Turin | 1,540 cfs | → |
| Monona-Harrison Ditch Near Turin | 461 cfs | → |
| Missouri River At Decatur | 28,200 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Parnell Creek Subwatershed Site 8-2.
Boat launches
Campgrounds
Track Parnell Creek Subwatershed Site 8-2 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 Parnell Creek Subwatershed Site 8-2
Where does the data for Parnell Creek Subwatershed Site 8-2 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 Parnell Creek Subwatershed Site 8-2.