Crawford County Roadgrade Dam 33-83-38 Reservoir Report
Last Updated: December 15, 2025
Crawford County Roadgrade Dam 33-83-38, located in Denison, Iowa, is a local government-owned earth dam completed in 2000 by the NRCS.
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Summary
This dam serves multiple purposes, including fire protection and providing a small fish pond for the community. With a height of 31 feet and a length of 750 feet, the dam has a storage capacity of 48 acre-feet and covers a surface area of 2.7 acres.
The dam is regulated by the Iowa Department of Natural Resources and is considered to have a low hazard potential, with a moderate risk assessment rating. While the dam has not been rated for its current condition, it is regularly inspected and meets state permitting requirements. The dam's primary source agency is the state of Iowa, and it is located along the TR-Walnut Creek, under the jurisdiction of the Rock Island District.
Overall, Crawford County Roadgrade Dam 33-83-38 plays a crucial role in providing water resource management and recreational opportunities for the local community. With its multiple purposes and state-regulated status, the dam stands as a key infrastructure for fire protection and small-scale fish pond activities. Climate and water resource enthusiasts can appreciate the importance of this dam in maintaining a balanced ecosystem and ensuring the safety of the surrounding area.
Year Completed |
2000 |
Dam Length |
750 |
Dam Height |
31 |
River Or Stream |
TR- WALNUT CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.7 |
Drainage Area |
0.27 |
Nid Storage |
48 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Raccoon River Near Sac City
|
312cfs |
Maple River At Mapleton
|
323cfs |
Boyer River At Logan
|
417cfs |
Soldier River At Pisgah
|
112cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
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.
Crawford County Roadgrade Dam 33-83-38