Audubon Fn-44-3(S)-21-05 Reservoir Report
Last Updated: December 13, 2025
Audubon Fn-44-3(S)-21-05 is a state-regulated dam located in Audubon, Iowa, along the TR-N.BRANCH TROUBLESOME CREEK.
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Summary
Built in 1977 by the Iowa Department of Transportation (IDOT), this earth dam stands at a height of 25 feet and has a length of 740 feet, providing a storage capacity of 150 acre-feet. The dam serves a primary purpose of "Other" and is classified as having a low hazard potential and a moderate risk assessment rating.
Managed by the Iowa Department of Natural Resources (DNR), Audubon Fn-44-3(S)-21-05 has not been rated for its condition assessment, with the last inspection taking place in February 1990. Despite its age, the dam continues to operate within regulatory guidelines, with state permitting, inspection, and enforcement all in place. In the event of an emergency, the dam's Emergency Action Plan (EAP) status is not specified, indicating a potential area for improvement in risk management measures.
For water resource and climate enthusiasts, Audubon Fn-44-3(S)-21-05 offers a fascinating case study in dam infrastructure in Iowa. With its unique design, purpose, and location, this dam represents the intersection of human engineering and natural water systems. As the dam continues to age, ongoing monitoring and potential updates to its emergency preparedness plan will be crucial in ensuring the safety and effectiveness of this important water resource management structure.
Year Completed |
1977 |
Dam Length |
740 |
Dam Height |
25 |
River Or Stream |
TR-N.BRANCH TROUBLESOME CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
0.18 |
Nid Storage |
150 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Audubon Fn-44-3(S)-21-05