Drafter
Clerk 12/08/2011
Title
AN ORDINANCE authorizing the condemnation of certain property for an easement for construction of a storage tank and appurtenances to control combined sewer overflows for the South Magnolia combined sewer overflow project, capital improvement project 423607.
Body
STATEMENT OF FACTS:
1. On November 22, 2010, the King County council adopted the 2011 Annual Budget and program by Ordinance 16984 and provided for funding for capital projects to support the wastewater treatment program.
2. One of the funded capital projects is the South Magnolia combined sewer overflow project for the construction of a storage tank, a conveyance pipe and associated structures to control combined sewer overflows in the South Magnolia basin, capital improvement project 423607.
3. The South Magnolia trunk sewer conveys combined sewer overflow from the South Magnolia basin to the West Point treatment plant. When heavy rains cause flows to exceed the capacity of the South Magnolia trunk sewer, a combination of stormwater and diluted sewage overflow from the Magnolia combined sewer overflow control structure to an overflow sewer and then to an outfall in Puget Sound. Over the last twenty years, this has resulted in an average of 19.2 overflows per year.
4. The South Magnolia combined sewer overflow project is necessary because state law mandates that combined sewer overflows occur no more than once every year for each location.
5. The location of the storage tank in the West Yard of Terminal 91, located south of the west end of the South Magnolia Bridge was chosen after a two-year review of potential sites. The property is owned by the Port of Seattle. The storage tank will require a thirty-two-thousand-nine-hundred-square-foot subterranean easement along with surface access for hatches, an aboveground ancillary building and a subterranean easement for conveyance pipe.
6. Construction of the storage tank will also require a sixty-thousand-square-...

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