Mc Murray Wetland Dam Reservoir Report

Last Updated: December 7, 2025

Mc Murray Wetland Dam, located in Rathbun Reservoir, Iowa, is a state-owned structure designed by Eric Horlyk for the purpose of creating a fish and wildlife pond.


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Summary

Completed in 1998, this earth dam stands at a height of 16 feet and spans a length of 5630 feet, with a storage capacity of 622 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and is situated on the TR-Chariton River, within the Wayne County of Iowa.

With a low hazard potential and a moderate risk assessment rating, the Mc Murray Wetland Dam serves as a crucial component for managing water resources and supporting wildlife habitats in the region. The dam's primary function is to provide a sanctuary for various fish and wildlife species, contributing to the ecological balance of the area. Despite its relatively small surface area of 232 acres, the dam plays a significant role in maintaining the natural landscape and promoting biodiversity within the Rathbun Reservoir.

As a key feature in the Rock Island District, the Mc Murray Wetland Dam serves as a vital structure for water resource management and climate preservation efforts. Its strategic location and design not only support the conservation of wildlife but also contribute to the overall environmental sustainability of the region. With state regulation and regular inspection, the dam ensures the safety and integrity of its operations, making it a valuable asset for both water enthusiasts and climate advocates alike.

Year Completed

1998

Dam Length

5630

Dam Height

16

River Or Stream

TR- CHARITON RIVER

Primary Dam Type

Earth

Surface Area

232

Drainage Area

8.6

Nid Storage

1975

Hazard Potential

Low

Foundations

Soil

Nid Height

16
       
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.