Mc Manigal Dam Reservoir Report

Last Updated: December 13, 2025

Mc Manigal Dam, located in Mills County, Iowa, stands as a vital water resource for the community since its completion in 1945.


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Summary

With a primary purpose of fire protection and serving as a stock or small fish pond, this private-owned earth dam has a height of 32 feet and a storage capacity of 278 acre-feet. Situated on the TR-WAUBONSIE CREEK, the dam plays a crucial role in managing water flow and providing essential irrigation for the surrounding area.

Despite its low hazard potential, Mc Manigal Dam is regulated by the Iowa Department of Natural Resources (DNR), ensuring compliance with state regulations and regular inspections. The dam's condition is currently rated as "Not Rated", with moderate risk identified for management purposes. The dam features an uncontrolled spillway and covers a drainage area of 0.89 square miles, contributing to the overall water management strategy in the region.

The dam's strategic location in Bartlett, Iowa, underlines its significance in maintaining water security and supporting various agricultural and recreational activities. As a key element in the local water infrastructure, Mc Manigal Dam exemplifies the intersection of water resource management and climate resilience, showcasing the importance of sustainable practices in safeguarding our precious water sources for future generations.

Year Completed

1945

Dam Length

30

Dam Height

32

River Or Stream

TR-WAUBONSIE CREEK

Primary Dam Type

Earth

Surface Area

30

Drainage Area

0.89

Nid Storage

278

Hazard Potential

Low

Foundations

Soil

Nid Height

32
       
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.