Dickman Subwatershed Site M-2 dam
Dickman Subwatershed Site M-2
Located in Woodbury County, Iowa, the Dickman Subwatershed Site M-2 is a local government-owned earth dam completed in 1973 for fire protection, stock, and small fish pond purposes. With a height of 42 feet and a length of 640 feet, the dam has a storage capacity of 94 acre-feet and serves to reduce flood risks in the area. Situated along TR-Parnell Creek, the dam's low hazard potential and moderate risk assessment make it a crucial infrastructure for water resource management and climate resilience in the region.
Managed by the Iowa Department of Natural Resources, the Dickman Subwatershed Site M-2 is regulated, permitted, inspected, and enforced for compliance with state standards. The dam's uncontrolled spillway and soil foundation contribute to its structural integrity, while its condition assessment remains unrated. Although no emergency action plan is currently in place, the dam's risk management measures are under review to ensure its continued effectiveness in mitigating potential hazards and safeguarding the surrounding community. As a key component of the local water infrastructure, the Dickman Subwatershed Site M-2 plays a vital role in maintaining water quality, supporting wildlife habitats, and enhancing overall ecosystem resilience in the area.
In collaboration with the Natural Resources Conservation Service, the Dickman Subwatershed Site M-2 demonstrates the importance of partnership in sustainable water resource management. With its strategic location, purposeful design, and functional operation, the dam serves as a model for integrating fire protection, agricultural water use, and ecological conservation. As water resource and climate enthusiasts continue to advocate for resilient infrastructure and adaptive management practices, the Dickman Subwatershed Site M-2 stands as a testament to the critical role of dams in balancing human needs with environmental stewardship for a more sustainable future.
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 Dickman Subwatershed Site M-2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Maple River At Mapleton | 278 cfs | → |
| West Fork Ditch At Hornick | 80 cfs | → |
| Little Sioux River At Correctionville | 1,450 cfs | → |
| Little Sioux River Near Turin | 1,740 cfs | → |
| Monona-Harrison Ditch Near Turin | 180 cfs | → |
| Missouri River At Decatur | 26,500 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Dickman Subwatershed Site M-2.
Boat launches
Campgrounds
Track Dickman Subwatershed Site M-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 Dickman Subwatershed Site M-2
Where does the data for Dickman Subwatershed Site M-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 Dickman Subwatershed Site M-2.