Durgens Creek Watershed Dam 33 Reservoir Report

Last Updated: December 19, 2025

Durgens Creek Watershed Dam 33, located in Hannibal, Missouri, was completed in 1971 by the USDA NRCS and serves as a vital structure for grade stabilization along the TR-Durgens Creek.


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Summary

This earth dam stands at a height of 30 feet and has a length of 470 feet, providing a storage capacity of 131 acre-feet and a normal storage of 80 acre-feet. With a low hazard potential and a moderate risk assessment rating, this dam plays a key role in managing water resources in the area.

Owned by the local government and designed by the Natural Resources Conservation Service, Durgens Creek Watershed Dam 33 is primarily used for grade stabilization purposes. The dam features an uncontrolled spillway with a width of 50 feet and has not been state regulated or inspected. Despite its "Not Rated" condition assessment, the dam's structural integrity remains sound, making it a crucial component of water management in the Lewis County area.

Overall, Durgens Creek Watershed Dam 33 is a significant earth dam structure in the Rock Island District, providing important grade stabilization functions along the TR-Durgens Creek. With its low hazard potential and moderate risk assessment rating, this dam continues to support water resource management efforts in the region while showcasing the expertise of the USDA NRCS in dam design and construction.

Year Completed

1971

Dam Length

470

Dam Height

28

River Or Stream

TR-DURGENS CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

28

Drainage Area

12.8

Nid Storage

131

Structural Height

30

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

30
       
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.