Maryville Lake Dam Reservoir Report

Last Updated: April 28, 2026

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Maryville Lake Dam in Missouri is a vital structure owned by the local government and regulated by the Dam and Reservoir Safety Program.


Summary

Built in 1990, the dam serves the primary purpose of water supply, with a storage capacity of 165 acre-feet and a normal storage level of 117 acre-feet. The dam stands at 35 feet in height and stretches 600 feet in length, holding back the waters of the TR Mozingo Creek.

Despite its low hazard potential and satisfactory condition assessment, Maryville Lake Dam is classified as having a high risk level of 2. The dam features an outlet gate valve and does not have a spillway. The surrounding area covers 11.1 acres with a drainage area of 111 square miles. With a maximum discharge rate of 303 cubic feet per second, the dam plays a crucial role in managing water resources in the region, making it a key point of interest for water resource and climate enthusiasts.

15-Day Long Term Forecast


Year Completed

1990

Dam Length

600

Dam Height

35

River Or Stream

TR MOZINGO CREEK

Surface Area

11.1

Drainage Area

111

Nid Storage

165

Structural Height

35

Outlet Gates

Valve

Hazard Potential

Low

Foundations

Soil

Nid Height

35
       
Seasonal Comparison

5-Day Hourly Forecast Detail

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.
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Nearby Reservoirs