Highbanks Dam Reservoir Report

Last Updated: December 5, 2025

Highbanks Dam, also known as Swan Cr.


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Summary

Diversion Dam, is a state-regulated structure located in Allegan, Michigan, specifically in the city of New Richmond. Completed in 1961, this earth-type dam stands at a height of 12 feet and serves primarily for recreational purposes along Swan Creek. With a normal storage capacity of 80 acre-feet and a maximum discharge of 2900 cubic feet per second, the dam covers a surface area of 32 acres within a drainage area of 49.1 square miles.

Despite its low hazard potential and satisfactory condition assessment, Highbanks Dam is subject to regular state inspections and enforcement by the Michigan Department of Environment, Great Lakes, and Energy (DEGLE). The dam features an uncontrolled spillway with a width of 313 feet, ensuring adequate water management during peak flow periods. Although the structure has not undergone significant modifications over the years, it continues to provide essential recreational opportunities for the local community while contributing to the overall water resource management in the region.

With a moderate risk assessment rating of 3, Highbanks Dam remains a critical component in the water infrastructure of Allegan County. While the dam does not have associated locks or outlet gates, its strategic location and design help mitigate potential risks associated with flooding and water flow control. As climate change impacts water resources and infrastructure, the ongoing monitoring and maintenance of Highbanks Dam exemplify the importance of sustainable dam management practices in safeguarding both the environment and local communities.

Year Completed

1961

Dam Length

780

Dam Height

12

River Or Stream

Swan Creek

Primary Dam Type

Earth

Surface Area

32

Hydraulic Height

10.9

Drainage Area

49.1

Nid Storage

256

Structural Height

12

Hazard Potential

Low

Nid Height

12
       
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.