Turkey Cr Watershed Site 10-11 Reservoir Report

Last Updated: December 14, 2025

Turkey Cr Watershed Site 10-11, located in Cass, Iowa, is a critical site managed by the local government for fire protection, stock, and small fish pond purposes.


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Summary

The dam, constructed in 1984 by the USDA NRCS, stands at a height of 23 feet and spans a length of 832 feet, with a storage capacity of 83 acre-feet. Despite having a low hazard potential, the dam plays a vital role in flood risk reduction for the TR- LONE TREE BRANCH river/stream.

With a drainage area of 0.34 square miles and a surface area of 7.5 acres, this earth dam is regulated by the Iowa DNR and is subject to regular state inspection, permitting, and enforcement. The site has a moderate risk assessment rating, reflecting the need for ongoing risk management measures. As part of the Omaha District, the dam is designed to ensure the safety and water resource sustainability of the surrounding community of LEWIS.

Overall, Turkey Cr Watershed Site 10-11 serves as a crucial resource for both water management and climate resilience in the region. Its strategic location and purposeful design highlight the importance of effective watershed management practices in safeguarding communities and ecosystems against potential hazards and promoting sustainable water resource utilization.

Year Completed

1984

Dam Length

832

Dam Height

23

River Or Stream

TR- LONE TREE BRANCH

Primary Dam Type

Earth

Surface Area

7.5

Drainage Area

0.34

Nid Storage

83

Hazard Potential

Low

Foundations

Soil

Nid Height

23
       
Seasonal Comparison

Weather Forecast

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.