Georgia John Farms Dam Reservoir Report

Last Updated: December 5, 2025

Georgia John Farms Dam, also known as Clark Dam, is a private-owned structure located in Mount Pleasant, Michigan.


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Summary

Built in 1972 on Tanner Creek, this earth dam primarily serves for recreational purposes, offering a storage capacity of 348 acre-feet and covering a surface area of 45 acres. With a height of 15 feet and a length of 1640 feet, it stands as a modest but essential component in the local water resource management system.

Despite its low hazard potential, the dam's condition assessment in 2002 rated it as poor, reflecting the need for maintenance and potential improvement. The dam features an uncontrolled spillway with a width of 151 feet and a maximum discharge of 1125 cubic feet per second. While the risk assessment indicates a moderate level of risk, the regulatory oversight by the Michigan DEGLE ensures that the dam is inspected, permitted, and enforced in accordance with state regulations, highlighting its importance in maintaining water safety and security in the region.

Year Completed

1972

Dam Length

1640

Dam Height

15

River Or Stream

Tanner Creek

Primary Dam Type

Earth

Surface Area

45

Hydraulic Height

15

Drainage Area

7.2

Nid Storage

348

Structural Height

15

Hazard Potential

Low

Nid Height

15
       
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.