Green Gate Farms Dam Reservoir Report

Last Updated: December 19, 2025

Green Gate Farms Dam, located in St.


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Summary

Charles, Missouri, is a privately owned earth dam completed in 1994 with a height of 46 feet and a length of 2475 feet. The dam has a storage capacity of 575 acre-feet and serves a drainage area of 470 acres. With a spillway width of 50 feet and a maximum discharge of 2450 cubic feet per second, the dam is equipped with an uncontrolled spillway and has a high hazard potential.

Despite its high hazard potential, Green Gate Farms Dam has been assessed as satisfactory in condition and meets regulatory requirements for inspection and enforcement by the DAM AND RESERVOIR SAFETY PROG in Missouri. The dam is managed by private owners and has not been modified since its completion. Although the risk assessment indicates a moderate level of risk (3), there are no specific risk management measures or guidelines in place for emergency action planning or inundation mapping.

For water resource and climate enthusiasts, Green Gate Farms Dam presents an interesting case study in dam safety and management. With its private ownership and state-regulated status, the dam highlights the importance of regular inspections, risk assessments, and emergency preparedness in ensuring the safety and integrity of critical water infrastructure in the face of changing environmental conditions.

Year Completed

1994

Dam Length

2475

Dam Height

46

Primary Dam Type

Earth

Surface Area

36

Drainage Area

470

Nid Storage

575

Structural Height

46

Outlet Gates

None

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

46
       
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.