Macs Pond Dam Reservoir Report

Last Updated: December 16, 2025

Macs Pond Dam, located in Kitsap, Washington, was completed in 1895 and serves as a vital water resource structure in the region.


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Summary

Owned privately, this earth dam stands at a hydraulic height of 39 feet and has a structural height of 26 feet, with a length of 220 feet. The dam has a storage capacity of 20 acre-feet and a normal storage of 12 acre-feet, covering a surface area of 1.3 acres and draining a 0.15 square mile area.

Managed by the Washington Department of Ecology, Macs Pond Dam is state-regulated and regularly inspected to ensure its safety and efficiency. While it has a low hazard potential, the dam's condition remains unrated, signifying the need for ongoing monitoring and maintenance. With a spillway type unspecified, the dam's emergency action plan was last revised in 2001, highlighting the importance of updated safety protocols and risk management measures for this critical infrastructure.

As an integral component of the Tr-Puget Sound watershed, Macs Pond Dam plays a crucial role in water storage and management in the region. With the Congressional District 06 represented by Derek Kilmer, efforts to maintain and improve the dam's functionality are essential for sustainable water resource management and climate resilience in Kitsap, Washington.

Year Completed

1895

Dam Length

220

River Or Stream

Tr-Puget Sound

Primary Dam Type

Earth

Surface Area

1.3

Hydraulic Height

39

Drainage Area

0.15

Nid Storage

20

Structural Height

26

Hazard Potential

Low

Foundations

Soil

Nid Height

39
       
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.