Linden Mill Dam Reservoir Report

Last Updated: December 5, 2025

Linden Mill Dam, also known as Ponemah, Tupper & Squaw Lakes Lcs, is a privately owned structure located in Linden, Michigan.


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Summary

Built in 1967, this gravity dam serves primarily for recreational purposes, providing a serene backdrop for outdoor activities along the Shiawassee River. With a height of 17 feet and a hydraulic height of 9.5 feet, the dam has a storage capacity of 110 acre-feet, ensuring a normal storage level of 80 acre-feet.

Despite its satisfactory condition assessment in 2019, Linden Mill Dam poses a high hazard potential, requiring regular inspections every three years. The controlled spillway with a width of 20 feet helps manage maximum discharges of up to 2518 cubic feet per second, ensuring the safety and stability of the surrounding area. The dam's risk assessment indicates a very high risk level, emphasizing the importance of ongoing risk management measures to protect the community and environment.

With its picturesque location and recreational significance, Linden Mill Dam stands as a vital water resource in Genesee County, Michigan. Maintaining the dam's integrity and safety is crucial for preserving the area's natural beauty and ensuring sustainable water management practices in the face of climate change challenges. Enthusiasts of water resources and climate action can appreciate the balance between recreation, risk assessment, and environmental stewardship embodied by Linden Mill Dam.

Year Completed

1967

Dam Length

200

Dam Height

17

River Or Stream

Shiawassee River

Primary Dam Type

Gravity

Surface Area

17

Hydraulic Height

9.5

Drainage Area

78

Nid Storage

110

Structural Height

17

Hazard Potential

High

Nid Height

17
       
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.