La Plata New City Dam Reservoir Report

Last Updated: December 11, 2025

The La Plata New City Dam, also known as the La Plata City Reservoir East Dam, is a local government-owned structure located in Macon, Missouri.


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Summary

Completed in 1980, this earth-type dam stands at a height of 43 feet and spans a length of 1000 feet, serving primarily for recreation purposes and water supply. With a maximum storage capacity of 929 acre-feet and a normal storage capacity of 667 acre-feet, the dam sits on Titus Creek and covers a surface area of 81 acres.

Managed by the Dam and Reservoir Safety Program, the La Plata New City Dam has a low hazard potential and is deemed to be in satisfactory condition as of its last assessment in 2007. Inspected every 5 years, the dam features an uncontrolled spillway with a width of 80 feet and is equipped with valve outlet gates. With a moderate risk assessment rating, the dam remains a vital resource for the surrounding Sue City community, providing essential water supply and recreational opportunities along Titus Creek.

In the event of an emergency, the dam's emergency action plan is up-to-date and meets guidelines, ensuring that proper measures are in place to address any potential risks. Overall, the La Plata New City Dam stands as a key infrastructure piece in Macon County, Missouri, providing a balance of water resource management and recreational activities for residents and visitors alike.

Year Completed

1980

Dam Length

1000

Dam Height

43

River Or Stream

TRTITUS CREEK

Primary Dam Type

Earth

Surface Area

81

Drainage Area

800

Nid Storage

929

Structural Height

43

Outlet Gates

Valve

Hazard Potential

Low

Foundations

Soil

Nid Height

43
       
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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.