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King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

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Puget Sound shoreline next to the West Point Treatment Plant, Seattle

Hidden Lake Pump Station replacement and sewer improvement

Hidden Lake Pump Station replacement

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The new pump station was designed to blend in with the residential neighborhood. More construction photos.

King County's Hidden Lake Pump Station serves part of Shoreline and collects wastewater from the Ronald Wastewater District (external link) and Highlands Sewer District. Wastewater is conveyed from Hidden Lake to the Richmond Beach Pump Station, and onward to Edmonds Treatment Plant. The old pump station was constructed nearly 40 years ago and needed to be replaced in order to:

  • Ensure safe and reliable operations for the future
  • Address critical capacity needs by increasing pumping capacity from 4.3 million gallons per day (mgd) to 6.8 mgd
  • Protect Puget Sound by reducing overflows
  • Meet current design standards, including odor and noise control

The new pump station is being built on the existing site. The building and landscape design was refined with citizen input and will blend in with the surrounding residential neighborhood. Restoration with native plants will create drought-tolerant, low maintenance landscaping that will screen neighboring properties.

Key considerations during design

King County held several public meetings in 2003 and consulted with neighbors. This table summarizes what we've heard and how we've addressed various issues during the design process.

Community issue Pump station design features
Views from neighboring properties
  • Rooflines and building materials that fit in residential setting (increased pitch)
  • Vegetative screening and sidewalks

Building materials
  • Earth tones for building exterior. Variety of materials to add interest
  • Tile roof

Landscaping
  • Site restoration
  • Native, drought-tolerant, low maintenance plantings

Height of building
  • Aboveground for efficient operations and maintenance (cannot be underground)
  • Access road/landscaping in front to reduce building mass

Fencing
  • Security fence behind building to discourage partying below

Noise and odor control
  • Odor control unit
  • Sound control/equipment enclosures

Long-term operation
  • Reliable, durable, energy-efficient equipment

 

Related information

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Why do we need the Hidden Lake project?
For more information, view Spring 2006 Newsletter (PDF, 900 KB)

Refer to the Project Library for pump station fact sheet.

Site and station designs

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Site Plan

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Landscape Plan

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Station Elevation View

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Sewer Connections at the new
Pump Station