Windsor Farrington Park Lake Dam Reservoir Report

Last Updated: December 5, 2025

Windsor Farrington Park Lake Dam in Pettis, Missouri, is a rockfill dam with a primary purpose of recreation.


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Summary

Completed in 1902, the dam has a height of 26 feet and a storage capacity of 209 acre-feet. Situated on the TR-ELM Branch river, the dam serves as a popular spot for outdoor enthusiasts and nature lovers to enjoy the picturesque surroundings.

Despite being a local government-owned structure, the dam is not regulated or inspected by the state. With a high hazard potential, the dam has not been rated for its condition assessment since its last inspection in 1980. The lack of recent assessments and emergency action plans raises concerns about the safety and maintenance of the dam, especially considering its age and the potential risks associated with its failure.

Water resource and climate enthusiasts visiting Windsor Farrington Park Lake Dam should be aware of its historical significance and recreational value, but also cautious of the lack of recent inspections and assessments. The dam's high hazard potential underscores the importance of prioritizing safety measures and regular maintenance to ensure the protection of the surrounding community and environment. As efforts to address the dam's condition and emergency preparedness continue, visitors are encouraged to stay informed and vigilant while enjoying the beauty and tranquility of the area.

Year Completed

1902

Dam Height

26

River Or Stream

TR-ELM BRANCH

Primary Dam Type

Rockfill

Surface Area

15

Drainage Area

752

Nid Storage

209

Structural Height

26

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

26
       
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.