Drafter
Clerk 3/26/2007
Title
AN ORDINANCE making a supplemental appropriation of $6,100,000 to cover costs and expenses relating to the procurement of construction, design and other services, materials and equipment on an emergency basis to perform the Mercer Island Pump Station Interceptor Line Replacement Project; and amending the 2007 Budget Ordinance, Ordinance 15652, Section 121, as amended.
Body
BE IT ORDAINED BY THE COUNCIL OF KING COUNTY:
SECTION 1. Findings.
A. On December 14, 2006, a powerful rain and windstorm hit the Puget Sound area, causing outages and surges in the conveyance lines throughout the county and prompting the King County executive to issue a Local Proclamation of Emergency on December 15, 2006. On January 8, 2007, the King County council adopted Motion 12430, which recognized the resultant damage and extended to March 1, 2007, the authority of the county to waive standard procurement processes to quickly mobilize to repair the damage.
B. An underground gravity sewer conveyance line located on both SE 24th Street and 84th Avenue SE and Luther Burbank Park on Mercer Island failed, creating a sinkhole that was approximately ten feet long, two feet wide and two feet deep on 84th Avenue SE on Mercer Island. Further investigation and excavation revealed that the underground gravity sewer conveyance line made of a material called Techite failed during the storm.
C. A second sinkhole on the line developed approximately ten feet upstream from the original sinkhole on December 21, 2006. This sinkhole was caused by a loss of backfill and gravel resulting from the original storm surge on December 14, 2006.
D. Wastewater treatment division ("WTD") personnel inspecting the pipe determined that it would not hold for another significant event and decided to temporarily bypass the line in order to relieve stress on the pipe and initiate a permanent replacement of the pipe. WTD, in conjunction with construction support from F...
Click here for full text