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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

    March to May - Utility locating & concrete panel replacement work.

    Beginning as early as May 2025, crews will trench in the street to route the conduit starting from 63rd Ave Pump Station towards the Alki WWTS. Trenching and conduit installation is estimated to be completed by Fall 2025.

  • 2026

    The installation of the generator at the Alki WWTS may begin as early as Fall 2025 and is estimated to completed by Fall 2026.

    Beginning as early as May 2026, crews will construct the transformer vault and cabinent at the 63rd Ave Pump Station. This project is estimated to be completed by Fall 2026.

Timeframes are approximate and may change based on factors such as permitting and unexpected delays. This flexible schedule shows the overall timeline while still outlining the key stages of the project.

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 Beach Dr SW, 64th Ave SW, SW Wilton Ct, and SW Hinds St.

Construction work will occur weekdays between the hours of 7 a.m. – 5 p.m., with possible weekend work. 

As work is underway, there will be:

  • Limited beachfront access on the eastern side of Charles Richey Sr. Viewpoint
  • Lane closures
  • Traffic detours
  • Flaggers and traffic control devices, such as signs and cones, to direct pedestrians and drivers 
  • Truck deliveries to Alki WWTS will use Beach Dr SW and turn onto Benton Pl SW to enter through the access gate
  • 2 to 3 street parking spaces will be occupied by contractors during work hours
  • Periodic noise from work equipment
     

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.

To ensure everyone’s safety, please do not approach the crews while they are working.

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