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Nov
21

About Alki standby generator

Get information about the Alki standby generator schedule, project need, and construction process.

Project schedule

The project will be completed in two phases:

  • 2025

    Trenching, putting in conduits, and installing the transformer vault will begin as early as Spring 2025. We estimate completing this by Fall 2025

  • 2026

    The installation of the generator at the Alki WWTS may begin as early as Spring 2026 and estimated to complete by Fall 2026.

Please note that these timeframes are approximate and may change. We will share more details about the construction schedule as we learn more from the selected contractor.

Project scope and location

The contractor will be installing additional equipment to connect power from Alki Wet Weather Treatment Station (WWTS) to the 63rd Ave Pump Station. This work will include:

  • Installing a permanent generator within the property of Alki WWTS 
  • Laying conduit under the road along SW Hinds St, SW Wilton Ct, 64th Ave SW, and Beach Dr SW (See the dotted line in the image below ).

Aerial view map displaying conduit route.Aerial view of the conduit route from Alki Wet Weather Treatment Station to 63rd Ave Pump Station

At the 63rd Ave Pump Station, King County will install:

  • A vault to hold a new transformer
  • A cabinet to protect the new transformer 
  • Conduits (with a protected cover) connecting the transformer to the pump station.  

The transformer must be well ventilated and in a structure above the high tide and splash zone. We will work with the contractor to determine the exact height of the transformer. 

Aerial view map displaying the location of the new transformer, next to 63rd Avenue Pump Station.Aerial view showing location of new transformer.

The transformer and vault platform will be located next to the 63rd Avenue Pump Station.Conceptual view of transformer and vault platform next to 63rd Avenue Pump Station. Before (top photo) and after (below photo) conceptual view from the park of the transformer and vault platform

A railing on a concrete structure next to the beach. Houses along a street in the background. Conceptual view showing the approximate location of the protected and covered conduits. Conduits will be on the waterfront facing side of the railing, minimizing impacts to shoreline views.

What to expect during construction

Connecting the 63rd Ave Pump Station to the generator requires digging trenches along SW Hinds St, SW Wilton Ct, 64th Ave SW, and Beach Dr SW. 

Construction work will occur weekdays between the hours of 7 a.m. – 7 p.m. and, if necessary, Saturdays from 9 a.m. – 5 p.m. 

As work is underway, there will be:

  • Lane closures
  • Traffic detours
  • Limited beachfront access on the eastern side of Charles Richey Sr. Viewpoint

During construction hours , residents along the active work area will experience limited driveway access. The contractor will cover the trenches with steel plates to provide residents access to their driveways outside of construction hours. We will provide advance notice to affected residents to reduce impacts to driveway access.

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