Dane Ridge Watershed Site A Reservoir Report
Last Updated: December 13, 2025
Dane Ridge Watershed Site A is a vital water resource located in Crawford County, Iowa.
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Summary
Managed by the local government and designed by the USDA NRCS, this site plays a crucial role in fire protection, stock, and small fish pond purposes, as well as flood risk reduction. With a dam height of 52 feet and a storage capacity of 398 acre-feet, this Earth dam completed in 1977 covers a surface area of 16.1 acres and serves a drainage area of 1.9 square miles.
Situated along the TR-Boyer River, Dane Ridge Watershed Site A is regulated by the Iowa DNR and boasts a low hazard potential with a moderate risk assessment rating. Despite its importance in managing water resources and mitigating flood risks, the site has not been rated for its condition assessment. With a strategic location in Dunlap, Iowa, this watershed site stands as a testament to effective water resource management and conservation efforts in the region.
As an integral part of the water infrastructure in Crawford County, Dane Ridge Watershed Site A showcases the collaborative efforts between local government agencies and the USDA NRCS to ensure the sustainability and efficiency of water resource management in the area. With its multiple purposes and regulated status, this site serves as a model for responsible water resource utilization and environmental stewardship in the face of changing climate patterns and increased water resource challenges.
Year Completed |
1977 |
Dam Length |
700 |
Dam Height |
52 |
River Or Stream |
TR-BOYER RIVER |
Primary Dam Type |
Earth |
Surface Area |
16.1 |
Drainage Area |
1.9 |
Nid Storage |
398 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
52 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Soldier River At Pisgah
|
112cfs |
Little Sioux River Near Turin
|
1040cfs |
Maple River At Mapleton
|
323cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Boyer River At Logan
|
417cfs |
West Fork Ditch At Hornick
|
80cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams 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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Dane Ridge Watershed Site A