Holloway Dam Reservoir Report

Last Updated: December 5, 2025

Holloway Dam, also known as Richfield Storage Dam, is a gravity-type dam located on the Flint River in Genesee, Michigan.


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Summary

Completed in 1954, the dam serves primarily for recreational purposes and stands at a height of 38 feet with a hydraulic height of 27 feet. It has a maximum storage capacity of 29,900 acre-feet and a normal storage capacity of 15,350 acre-feet, covering a surface area of 1400 acres.

With a controlled spillway width of 240 feet and a maximum discharge rate of 36,200 cubic feet per second, Holloway Dam is equipped to handle high hazard potential. Despite its high risk assessment, the dam has been deemed to be in satisfactory condition, as per the last inspection conducted in August 2018. The dam is regulated and inspected by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE) to ensure its safety and compliance with state regulations.

Holloway Dam plays a crucial role in water resource management in the region and is a key feature for water and climate enthusiasts to explore and study. Its location on the Flint River provides valuable insights into the impact of dams on local ecosystems and water supply, making it a significant asset for research and conservation efforts in the area.

Year Completed

1954

Dam Length

3350

Dam Height

38

River Or Stream

Flint River

Primary Dam Type

Gravity

Surface Area

1400

Hydraulic Height

27

Drainage Area

526

Nid Storage

29900

Structural Height

38

Hazard Potential

High

Nid Height

38
       
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.
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Area Campgrounds