Knoxville Pond Dam Reservoir Report

Last Updated: December 8, 2025

Located in Marion, Iowa, the Knoxville Pond Dam is a local government-owned structure designed by Garden Engineering Services.


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Summary

Completed in 1961, this earth dam serves primarily for recreational purposes, with a height of 31 feet and a length of 375 feet. Situated along the TR-Whitebreast Creek within the Red Rock Reservoir area, the dam has a storage capacity of 115 acre-feet and a surface area of 7.7 acres.

Managed by the Iowa Department of Natural Resources, the Knoxville Pond Dam is regulated, inspected, and enforced by state authorities to ensure its safety and compliance with regulations. With a low hazard potential and a moderate risk assessment rating, the dam is considered to be in fair condition, although it has not been recently assessed for its current state. Despite its uncontrolled spillway type, the dam poses minimal risk to surrounding areas and is not currently equipped with emergency action plans or inundation maps.

Water resource and climate enthusiasts may find the Knoxville Pond Dam to be an interesting site for its historical significance and recreational value within the local community. While its primary purpose is for leisure activities, the dam's design and construction reflect the importance of water management in the region. As efforts continue to maintain and monitor the dam's integrity, it serves as a reminder of the crucial role that infrastructure plays in preserving water resources and mitigating potential risks associated with dam structures.

Year Completed

1961

Dam Length

375

Dam Height

31

River Or Stream

TR-WHITEBREAST CREEK

Primary Dam Type

Earth

Surface Area

7.7

Drainage Area

0.49

Nid Storage

115

Hazard Potential

Low

Foundations

Soil

Nid Height

31
       
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.