Drafter
Clerk 06/07/2013
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AN ORDINANCE authorizing the condemnation of certain property and property rights needed for the replacement of the Fremont siphon pipelines with a new and separate crossing under the Lake Washington Ship Canal as part of the Fremont siphon replacement project.
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BE IT ORDAINED BY THE COUNCIL OF KING COUNTY:
SECTION 1. Findings:
A. On November 22, 2010, the King County council adopted the 2011 Annual Budget and Program by Ordinance 16984 and provided funding for capital projects to support King County's wastewater treatment program.
B. One of the funded capital projects is the Fremont siphon replacement project for the construction of replacement siphon pipes under the Lake Washington Ship Canal, under capital improvement project 1047697.
C. The Fremont siphon is a critical conveyance line that conveys wastewater from King County's northeastern service area to the West Point treatment plant. The existing pipelines extend from Fremont to Queen Anne in a concrete tunnel and conveys up to two hundred twenty million gallons of wastewater per day, at peak flow, across the Lake Washington Ship Canal. The Fremont siphon was installed in the early 1900s. After approximately one hundred years of wastewater conveyance service, replacing this major infrastructure is now due and will require King County's careful planning and consideration.
D. To meet the challenge of replacing these important pipelines in a densely developed area, a range of options to rehabilitate or replace the Fremont siphon were considered. In 2010, King County's wastewater treatment division recommended replacing the existing pipelines in a new location to reduce potential project risks and impacts, maintain operations during construction, and to ensure safe, reliable wastewater conveyance.
E. Private property must be acquired to provide space for a microtunnel launch shaft and odor control facility. Two microtunnels will be constructed j...
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