Crawford Creek Subwatershed Site M-1 Reservoir Report
Last Updated: December 15, 2025
Located in Danbury, Iowa, the Crawford Creek Subwatershed Site M-1 is a vital earth dam constructed in 1976 by the USDA NRCS for fire protection, stock, and small fish pond purposes.
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Summary
With a height of 33 feet and a length of 635 feet, the dam has a storage capacity of 141 acre-feet, serving as a crucial flood risk reduction structure in the area. The dam is regulated by the Iowa Department of Natural Resources and is classified as having a low hazard potential with a moderate risk assessment.
Situated on TR-Crawford Creek, the dam plays a key role in protecting the surrounding community and wildlife from potential flooding events. The site is under state jurisdiction, with regular inspections and enforcement ensuring its structural integrity and safety. Despite not having a condition assessment rating, the Crawford Creek Subwatershed Site M-1 remains a significant asset in the region, contributing to water resource management and climate resilience efforts.
As a focal point for water resource and climate enthusiasts, the Crawford Creek Subwatershed Site M-1 exemplifies the importance of sustainable infrastructure development for natural disaster mitigation. With its earth dam design and state-regulated status, the site serves as a model for effective water management practices and showcases the collaboration between local governments and federal agencies in safeguarding communities against potential hazards. Additionally, the dam's multi-purpose functionality underscores its versatility in addressing various environmental needs while maintaining a low hazard potential and moderate risk assessment rating.
Year Completed |
1976 |
Dam Length |
635 |
Dam Height |
33 |
River Or Stream |
TR-CRAWFORD CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
0.46 |
Nid Storage |
141 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
Little Sioux River At Correctionville
|
327cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
North Raccoon River Near Sac City
|
312cfs |
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 Creek Subwatershed Site M-1