Monroe City Dam Reservoir Report

Last Updated: December 18, 2025

Monroe City Dam, located in Ralls County, Missouri, stands as a vital water resource and recreational site in the region.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1967, this earth dam spans 600 feet in length and reaches a height of 47 feet, creating a storage capacity of 3,000 acre-feet. The dam serves multiple purposes, including recreation and water supply, with a primary focus on providing a picturesque setting for outdoor activities.

Managed by the local government, the Monroe City Dam is regulated and inspected by the DAM AND RESERVOIR SAFETY PROGRAM to ensure its structural integrity and compliance with safety standards. With a significant hazard potential and a satisfactory condition assessment, the dam poses a moderate risk that is closely monitored and managed. The spillway, with a width of 166 feet, provides controlled water release during peak flow periods, safeguarding downstream areas from flooding risks.

Visitors to Monroe City Dam can enjoy a 95-acre surface area for recreational activities such as fishing, boating, and hiking along the Ely Creek. The dam's location in New London, Missouri, and its proximity to St. Louis District make it easily accessible for both locals and tourists seeking a scenic escape in nature. With its rich history, structural significance, and environmental impact, Monroe City Dam stands as a symbol of sustainable water management and climate resilience in the region.

Year Completed

1967

Dam Length

600

Dam Height

47

River Or Stream

ELY CREEK

Primary Dam Type

Earth

Surface Area

95

Hydraulic Height

37

Drainage Area

5150

Nid Storage

3000

Structural Height

47

Outlet Gates

None

Hazard Potential

Significant

Foundations

Rock

Nid Height

47
       
Seasonal Comparison

Weather Forecast

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.
View more

Area Campgrounds