Big Whiskey 1 Subwatershed Site 13-2 Reservoir Report

Last Updated: December 15, 2025

Big Whiskey 1 Subwatershed Site 13-2 is a fascinating water resource management site located in Woodbury, Iowa.


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Summary

Owned by the local government, this site is regulated by the Iowa Department of Natural Resources and has been designated for fire protection, stock, and small fish pond purposes. The dam at this site, completed in 1967, stands at a height of 22 feet and has a storage capacity of 78 acre-feet, serving as a critical component for flood risk reduction in the area.

Situated on the TR-Whiskey Creek, this earth dam spans 683 feet in length and covers a drainage area of 0.55 square miles. With a surface area of 2.1 acres, this low hazard potential structure offers a moderate risk management assessment. While the condition assessment is not rated, the site meets state permitting and inspection requirements, ensuring its operational efficiency and safety. Overall, Big Whiskey 1 Subwatershed Site 13-2 plays a vital role in water resource management for the region, highlighting the importance of sustainable infrastructure development for climate resilience and environmental protection.

Year Completed

1967

Dam Length

683

Dam Height

22

River Or Stream

TR-WHISKEY CREEK

Primary Dam Type

Earth

Surface Area

2.1

Drainage Area

0.55

Nid Storage

78

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.