River Cement Company Dam Reservoir Report

Last Updated: December 6, 2025

The River Cement Company Dam, also known as River Cement Co.


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Summary

Lake Dam, is a privately owned structure located in Crystal City, Missouri. Built in 1965, this rockfill dam stands at a height of 57 feet and stretches 605 feet in length, with a storage capacity of 595 acre-feet. Situated on a tributary to the Mississippi River, the dam serves various purposes, including flood control and water supply.

Managed by the DAM and Reservoir Safety Program in Missouri, the River Cement Company Dam has a high hazard potential and is inspected every two years to ensure its structural integrity. Despite its age, the dam is deemed to be in satisfactory condition as of the last assessment in 2007. With a moderate risk assessment rating, appropriate risk management measures are in place to mitigate any potential hazards and ensure the safety of the surrounding area.

With a valve outlet gate and an uncontrolled spillway, the River Cement Company Dam plays a crucial role in regulating water flow and storage in the region. Its location in Jefferson County, Missouri, makes it a significant feature within the local water resource infrastructure, highlighting the importance of proper maintenance and oversight to safeguard against any potential risks or emergencies.

Year Completed

1965

Dam Length

605

Dam Height

57

River Or Stream

TRIBUTARY TO MISSISSIPPI RIV.

Primary Dam Type

Rockfill

Surface Area

18

Drainage Area

263

Nid Storage

595

Structural Height

57

Outlet Gates

Valve

Hazard Potential

High

Foundations

Rock

Nid Height

57
       
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.