Crawford Creek Subwatershed Site 3-1 Reservoir Report
Last Updated: December 15, 2025
Crawford Creek Subwatershed Site 3-1 is a dam located in Danbury, Iowa, designed by the USDA NRCS in 1976 for fire protection, stock, and small fish pond purposes.
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Summary
The earth dam stands at a height of 37 feet and stretches 528 feet in length, with a storage capacity of 145 acre-feet. It serves to reduce flood risks in the area and is regulated by the Iowa DNR, with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.
The dam, situated on TR-Crawford Creek, has a low hazard potential and a moderate risk assessment rating of 3. It covers a drainage area of 0.57 square miles and has a surface area of 7 acres. While it has not been given a condition assessment, it is deemed to be in overall good condition. The dam features an uncontrolled spillway and is managed by local government authorities, with no federal agency ownership or funding associated with it.
Water resource and climate enthusiasts would find Crawford Creek Subwatershed Site 3-1 to be an interesting case study in dam infrastructure in rural Iowa. Its construction and purpose, along with its management and regulation, provide valuable insights into the role of such structures in water management and conservation efforts. The data on the dam's design, dimensions, and risk assessment offer a comprehensive look at its significance in the local ecosystem and the measures taken to ensure its safety and effectiveness.
Year Completed |
1976 |
Dam Length |
528 |
Dam Height |
37 |
River Or Stream |
TR-CRAWFORD CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
0.57 |
Nid Storage |
145 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
37 |
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 3-1