Hidden Lake Pump Station replacement and sewer improvement

Completed spring 2009

From 2006-2009 King County rebuilt ageing sewer infrastructure and provided needed capacity to protect public health, limit overflows to the Puget Sound, and to provide safe, reliable service for the next 50 years in western Shoreline.

 
Learn more about the new underground storage pipe in Boeing Creek Park and replacement of the Boeing Creek Trunk Sewer and Hidden Lake Pump Station (PDF).


The only above ground structure in Boeing Creek Park is an odor control stack disguised as a tree snag. View project photos.

What King County built

• New underground storage pipe
• A 500,000-gallon underground storage pipe that temporarily stores wastewater during large storms
• Underground odor and flow control structures
• About 1,000 feet of sewer pipe replaced in the streets around the park
• Additional capacity added to the city’s stormwater detention pond
• Boeing Creek trunk sewer replacment
• Replaced about 1,200 feet of Ronald Wastewater District sewer pipe
• Replaced about 12,000 feet of county sewer pipe
• Replaced about 6,500 feet of water mains for Seattle Public Utilities
• Repaved streets and widened asphalt shoulder in some areas
• Pump station replacement
• A new Hidden Lake Pump Station, with pumping capacity of 6.8 mgd
• A cost-effective design that helps the building blend in with the neighborhood
• In winter 2008, landscaping with mostly native plants completed

Project schedule

• Construction began: summer 2006
• Construction complete:
  • Underground storage tank in Boeing Creek Park - fall 2007
  • Boeing Creek trunk - summer 2008
  • Hidden Lake Pump Station - spring 2009