Turkey Cr Watershed Site 10-25 Reservoir Report

Last Updated: December 14, 2025

Turkey Cr Watershed Site 10-25 in Cass, Iowa, is a local government-owned dam designed by USDA NRCS to serve multiple purposes including fire protection, stock, small fish pond, and flood risk reduction.


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Summary

Completed in 1990, this earth-type dam stands at a height of 26 feet and has a length of 600 feet, providing a storage capacity of 154 acre-feet and covering a surface area of 8.6 acres. Located along the TR-LONE TREE BRANCH river, this dam is regulated by the Iowa DNR and is subject to state permitting, inspection, and enforcement.

With a low hazard potential and a moderate risk assessment score of 3, Turkey Cr Watershed Site 10-25 plays a vital role in managing water resources in the area. The dam's primary purpose is to protect against fire, provide water for livestock, and help mitigate flood risks in the region. Despite its age, the dam remains in good condition and has not been rated for its structural integrity. Emergency action plans and risk management measures are yet to be prepared, suggesting a need for further evaluation and preparedness to address potential risks in the future.

As part of the Omaha District within Iowa, Turkey Cr Watershed Site 10-25 contributes to the overall water management infrastructure in the state. With a controlled spillway type and no outlet gates, the dam serves as a critical piece of infrastructure for the community of LEWIS and surrounding areas. As water resource and climate enthusiasts, understanding the functionality and significance of dams like Turkey Cr Watershed Site 10-25 is essential for ensuring the sustainability and resilience of water systems in the face of changing environmental conditions.

Year Completed

1990

Dam Length

600

Dam Height

26

River Or Stream

TR-LONE TREE BRANCH

Primary Dam Type

Earth

Surface Area

8.6

Drainage Area

0.62

Nid Storage

154

Hazard Potential

Low

Foundations

Soil

Nid Height

26
       
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.