Colonial Acres Lake Dam Reservoir Report

Last Updated: December 6, 2025

Colonial Acres Lake Dam, located in Menfro, Missouri, stands as a vital resource for irrigation and recreation in the area since its completion in 1965.


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Summary

This privately-owned earth dam, with a height of 29 feet, provides essential storage of 264 acre-feet of water from the Tyler Branch-Cinque Hommes stream for agricultural use. With a surface area of 17 acres and a drainage area of 352 square miles, the dam serves as a key infrastructure for water management in Perry County.

Although not regulated by the state, Colonial Acres Lake Dam has a high hazard potential due to its critical role in irrigation and the surrounding community. The dam's condition assessment remains unrated, with its last inspection dating back to September 1979. Despite the lack of recent assessments, the dam's emergency action plan and risk management measures are currently unspecified, highlighting the need for updated safety protocols to mitigate potential risks associated with its operation.

As water resource and climate enthusiasts, understanding the significance of Colonial Acres Lake Dam in sustaining local agriculture and recreation underscores the importance of regular maintenance and risk assessment. With its high hazard potential and historical significance in the region, prioritizing safety measures and emergency preparedness for the dam is crucial for ensuring the continued well-being of both the community and the environment it serves.

Year Completed

1965

Dam Height

29

River Or Stream

TYLER BRANCH-CINQUE HOMMES

Primary Dam Type

Earth

Surface Area

17

Drainage Area

352

Nid Storage

264

Structural Height

29

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

29
       
Seasonal Comparison

Weather Forecast

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Nearby Streamflow Levels

Colonial Acres Lake DamSouth Fork Saline Creek near Perryville Preview South Fork Saline Creek Near Perryville
10.4cfs
10cfs
Colonial Acres Lake DamMississippi River at Chester Preview Mississippi River At Chester
96900.0cfs
96900cfs
Colonial Acres Lake DamLittle St. Francis River at Fredericktown Preview Little St. Francis River At Fredericktown
1.1cfs
1cfs
Colonial Acres Lake DamSt. Francis River near Mill Creek Preview St. Francis River Near Mill Creek
75.3cfs
75cfs
Colonial Acres Lake DamBIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO Preview Big Muddy River At Rte 127 At Murphysboro
96.0cfs
96cfs
Colonial Acres Lake DamBig River below Desloge Preview Big River Below Desloge
55.5cfs
56cfs

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