Boeing Flood Control Dam Reservoir Report

Last Updated: December 15, 2025

Boeing Flood Control Dam, located in Snohomish, Washington, is a crucial structure designed for flood risk reduction along the Powder Mill Gulch.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1967, this private dam stands at a hydraulic height of 32 feet and spans 200 feet in length. With a capacity to store 80 acre-feet of water, it plays a significant role in managing the runoff from a drainage area of 1.11 square miles.

Managed by the Washington Department of Ecology, the dam has been inspected regularly to ensure its structural integrity and functionality. Classified as having a significant hazard potential, the Boeing Flood Control Dam is deemed to be in satisfactory condition as of the last assessment in 2017. Despite its primary purpose being flood risk reduction, the dam also serves as a stone-core earth dam with a soil foundation, effectively controlling the flow of water and mitigating potential flood damage in the region.

In the event of an emergency, it is essential for the authorities to have an Emergency Action Plan (EAP) in place. While the details of the EAP for Boeing Flood Control Dam are not explicitly provided in the data, it is crucial for the stakeholders to ensure that the plan meets the necessary guidelines and is regularly reviewed and updated. With its strategic location and operational efficiency, the Boeing Flood Control Dam stands as a vital infrastructure for protecting the community against the impacts of flooding and safeguarding lives and property in Darlington, Washington.

Year Completed

1967

Dam Length

200

River Or Stream

Powder Mill Gulch

Primary Dam Type

Earth

Surface Area

0.1

Hydraulic Height

32

Drainage Area

1.11

Nid Storage

80

Structural Height

32

Hazard Potential

Significant

Foundations

Soil

Nid Height

32
       
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.