Pigeon Creek No 1 Stormwater Detention D Reservoir Report

Last Updated: December 15, 2025

Pigeon Creek No 1 Stormwater Detention D, also known as Pigeon Creek No.


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Summary

1 Detention Pond Dam, is a crucial infrastructure within Everett City Limits, Snohomish, Washington. This stormwater detention facility, completed in 1990, serves a primary purpose of flood risk reduction for the surrounding area. Managed by the Washington Dept of Ecology, this earthen dam has a hydraulic height of 21.5 feet and a normal storage capacity of 18.2 acre-feet, providing vital protection against potential flooding events along Pigeon Creek.

With a significant hazard potential and a fair condition assessment as of July 2021, Pigeon Creek No 1 Stormwater Detention D undergoes regular inspections every five years to ensure its structural integrity and functionality. The dam has a maximum storage capacity of 25.5 acre-feet, with a drainage area of 0.31 square miles and a maximum discharge rate of 322 cubic feet per second. Located within Congressional District 02, Washington, this vital piece of infrastructure plays a crucial role in mitigating flood risks and protecting the local community from potential water-related disasters. Climate and water resource enthusiasts would find this information valuable for understanding the importance of stormwater management in maintaining the resilience of urban areas against the impacts of climate change.

Year Completed

1990

River Or Stream

Pigeon Creek

Primary Dam Type

Earth

Surface Area

3

Hydraulic Height

21.5

Drainage Area

0.31

Nid Storage

25.5

Structural Height

18.5

Hazard Potential

Significant

Foundations

Soil

Nid Height

22
       
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.