Seaway Center Stormwater Detention Dam

Tr-Powder Mill Gulch· Snohomish, Washington· Built 1989· Earth·
Significant Hazard Flood Risk Reduction Local Government

Key Takeaway

Seaway Center Stormwater Detention Dam is classified as significant hazard in Washington. It was completed in 1989 and is 37 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam TypeEarth
Max Storage27 acre-ft
Normal Storage16 acre-ft
Surface Area14 acres
Drainage Area0 sq mi
Max Discharge90 cfs
Year Completed1989 (37 years old)
NID IDWA01664

Safety Information

Significant Hazard

No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.

Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?

Emergency Action Plan: Yes
Last Inspection: September 22, 2023
State Regulated: Yes
Regulatory Agency: Washington Dept of Ecology

Ownership

Everett City Public Works

Local Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Seaway Center Stormwater Detention Dam?

Seaway Center Stormwater Detention Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.

Who owns and operates Seaway Center Stormwater Detention Dam?

Seaway Center Stormwater Detention Dam is owned by Everett City Public Works (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Seaway Center Stormwater Detention Dam built?

Seaway Center Stormwater Detention Dam was completed in 1989, making it 37 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.

What is the primary purpose of Seaway Center Stormwater Detention Dam?

Seaway Center Stormwater Detention Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was Seaway Center Stormwater Detention Dam last inspected?

Seaway Center Stormwater Detention Dam was last inspected on September 22, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.