Interfor Pacific Stormwater Pond Reservoir Report

Last Updated: December 15, 2025

Interfor Pacific Stormwater Pond is a privately owned facility located in Port Angeles, Washington, designed for flood risk reduction along the Tr - Dry Creek.


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Summary

Completed in 2001, this earth dam structure stands at a hydraulic height of 8 feet and a structural height of 7 feet, with a storage capacity of 32 acre-feet. The pond covers a surface area of 4.6 acres and serves a drainage area of 0.14 square miles, with a maximum discharge capacity of 440 cubic feet per second.

Managed by the Washington Department of Ecology, Interfor Pacific Stormwater Pond is regulated, permitted, inspected, and enforced by state authorities to ensure its functionality and safety. With a high hazard potential, the dam's condition was last assessed as satisfactory in 2015, with an inspection frequency of 5 years. While the facility has not been modified in recent years, emergency action plans and risk assessment measures are under review to meet guidelines and ensure effective management in case of inundation events.

Interfor Pacific Stormwater Pond, situated within Congressional District 06, Washington, is a critical infrastructure for flood risk mitigation in the region. As a key component in protecting the surrounding community from potential hazards, the dam's design, construction, and operation play a vital role in maintaining the stability and resilience of the area's water resources and climate dynamics. With a focus on safety and regulatory compliance, this facility stands as a testament to proactive measures taken to address environmental challenges and safeguard against emergencies in the face of changing climate conditions.

Year Completed

2001

River Or Stream

Tr - Dry Creek

Primary Dam Type

Earth

Surface Area

4.6

Hydraulic Height

8

Drainage Area

0.14

Nid Storage

32

Structural Height

7

Hazard Potential

High

Foundations

Soil

Nid Height

8
       
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.