Lake Morris Dam Reservoir Report

Last Updated: December 8, 2025

Lake Morris Dam, located in Red Rock Reservoir, Iowa, is a vital water resource for the region, serving as a primary water supply source.


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Summary

Built in 1993, this earth dam stands at a height of 39 feet and has a length of 1060 feet, with a maximum storage capacity of 3440 acre-feet. The dam is situated on the Little Whitebreast Creek and is regulated by the Iowa Department of Natural Resources, ensuring proper inspection, permitting, and enforcement measures are in place.

With a surface area of 155 acres and a drainage area of 7.13 square miles, Lake Morris Dam plays a crucial role in flood control and water management in the Lucas County area. The dam has an uncontrolled spillway type with a width of 4 feet, and its condition is assessed as satisfactory with a significant hazard potential. The dam's risk assessment is moderate, indicating a need for ongoing monitoring and management to ensure public safety and water security. The dam's emergency action plan and risk management measures are currently under review, highlighting the importance of preparedness and response protocols for potential incidents.

Year Completed

1993

Dam Length

1060

Dam Height

39

River Or Stream

LITTLE WHITEBREAST CREEK

Primary Dam Type

Earth

Surface Area

155

Drainage Area

7.13

Nid Storage

3440

Hazard Potential

Significant

Foundations

Soil

Nid Height

39
       
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.