Pool One A Reservoir Report

Last Updated: December 5, 2025

Pool One A is a federally-owned water resource located in Saginaw, Michigan, along Ferguson Bayou Offstream.


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Summary

The dam, completed in 1958, is primarily used for purposes other than flood control or water supply, with a low hazard potential and a moderate risk assessment. Despite being not rated for condition assessment, the dam stands at a height of 13 feet and spans a length of 11,220 feet, with a maximum storage capacity of 750 acre-feet and a normal storage capacity of 576 acre-feet.

Managed by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE), Pool One A is regulated, permitted, inspected, and enforced by state authorities. The dam features an uncontrolled spillway with a width of 200 feet and has not undergone significant modifications since its construction. While the dam has not been rated for its emergency action plan or inundation maps, the risk management measures are deemed effective for the moderate risk level associated with the structure.

With a historical significance dating back to over six decades, Pool One A serves as a vital component of the water resource infrastructure in Saginaw, Michigan. While the dam's condition assessment remains pending, its operations continue to support the surrounding ecosystem and communities with controlled water storage and discharge capabilities. As water resource and climate enthusiasts, the data surrounding Pool One A provides valuable insights into the management and maintenance of critical infrastructure for sustainable water resource utilization and environmental protection.

Year Completed

1958

Dam Length

11220

Dam Height

13

River Or Stream

Ferguson Bayou Offstream

Primary Dam Type

Earth

Surface Area

144

Hydraulic Height

13

Nid Storage

750

Structural Height

13

Hazard Potential

Low

Nid Height

13
       
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.