Westfield Reservoir Report

Last Updated: December 5, 2025

Westfield, located in Marquette, Wisconsin, is home to a historic dam on the Westfield Creek that serves multiple purposes, including hydroelectric power generation and recreation.


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Summary

Completed in 1853, this gravity dam stands at a height of 19 feet and has a storage capacity of 225 acre-feet. With a low hazard potential and fair condition assessment, the dam has been inspected regularly, with the last inspection conducted in April 2019.

Managed by the local government, Westfield Dam has state jurisdiction and regulatory oversight by the Wisconsin Department of Natural Resources. Despite its age, the dam has undergone modifications in 1995 to ensure its structural integrity. The dam's controlled spillway and maximum discharge capacity of 650 cubic feet per second help mitigate flood risks in the area. In the event of emergencies, the dam's risk assessment categorizes it as having a very high potential, emphasizing the importance of risk management measures.

Westfield Dam's significance lies not only in its historical value but also in its role as a vital water resource infrastructure in the region. With its blend of functionality and recreational appeal, this dam on the Westfield Creek stands as a testament to the intersection of water resource management and climate resilience efforts in Wisconsin.

Years Modified

1995 - Other

Year Completed

1853

Dam Length

200

Dam Height

19

River Or Stream

WESTFIELD CREEK

Primary Dam Type

Gravity

Surface Area

32

Hydraulic Height

15

Drainage Area

9

Nid Storage

225

Structural Height

19

Hazard Potential

Low

Nid Height

19
       
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.