Cambria Reservoir Report

Last Updated: December 5, 2025

Cambria, located in Columbia County, Wisconsin, is a locally owned and regulated earth dam on the North Branch Duck Creek.


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Summary

Completed in 1849, this dam serves primarily for water supply purposes, with a storage capacity of 200 acre-feet and a normal storage of 102 acre-feet. The dam stands at a height of 28 feet and has a hydraulic height of 22 feet, with a length of 300 feet and a drainage area of 8.5 square miles.

Despite its age, Cambria Dam has been well-maintained and is in satisfactory condition according to its last assessment in January 2020. The dam has a high hazard potential due to its location and design, with a moderate risk rating. It has undergone modifications in 1993 and 2006, ensuring its continued functionality and safety. The dam is inspected every two years, with the last inspection conducted in July 2019, demonstrating a commitment to ensuring its integrity and the safety of the surrounding community.

Cambria Dam is a vital infrastructure for the region, providing not only water supply but also recreational opportunities. With its historical significance and importance in water resource management, Cambria Dam serves as a testament to the enduring impact of human ingenuity in harnessing and managing natural resources for the benefit of society.

Years Modified

1993 - Other, 2006 - Other

Year Completed

1849

Dam Length

300

Dam Height

28

River Or Stream

NORTH BRANCH DUCK CREEK

Primary Dam Type

Earth

Surface Area

25

Hydraulic Height

22

Drainage Area

8.5

Nid Storage

200

Structural Height

28

Hazard Potential

High

Nid Height

28
       
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.