HomeMy WebLinkAboutTrans 2012-01-17 Item 2B - Interlocal Agreement - Boeing Access Road Bridge with King CountyCity of Tukwila
Jim Haggerton, Mayor
INFORMATIONAL MEMORANDUM
TO: Mayor Haggerton
Transportation Committee
FROM Bob Giberson, Public Works Director
DATE: January 13, 2012
SUBJECT: 2011 Bridge Inspections and Repairs Program Boeing Access Rd Bridge
Project No. 91110402
King County Interlocal Agreement
ISSUE
Approve Discretionary Request #TK -003 for repairs related to the Boeing Access Road Bridge.
BACKGROUND
In 2010, an Interlocal Agreement, City Contract No. 10 -022, was executed between Tukwila and
King County that allows Tukwila to utilize King County Road Division to perform a variety of
services. The agreement requires that Tukwila make a request for the road services desired and
that King County propose a recommended action which includes an estimated cost to perform
the work.
ANALYSIS
The most recent bridge inspection for the Boeing Access Road Bridge, over the UP BN
railroads (TUK -12), revealed that a significant void was developing under the west roadway
approach slab to the bridge. This roadway carries an average of 35,000 to 40,000 vehicles per
day, including a significant percentage of truck traffic. The roadway approach slabs are not
designed to carry vehicle loads without support from the subgrade soils. With the void between
the roadway and the ground, the roadway was actually functioning as a bridge.
Discretionary Request #TK -003 (Form A) was made by Tukwila on 10/27/11 to have King
County fill the void. King County responded on 11/10/11 with a recommended action (Form B)
with an estimated cost of $67,000.00. The work was of a critical nature and King County staffing
availability necessitated that the work be done in late November to mid December 2011. Due to
the schedule for work to be performed, Public Works was not able to take this item through
Council approval in December due to the lack of Committee meetings.
King County has prepared the attached agreement to perform the necessary bridge repairs for
Tukwila.
Contract 2011 Budget
Bridge Repair Services 67,000.00 233,000.00
RECOMMENDATION
Approve Discretionary Request #TK -003 in the amount of $67,000.00 with King County and
consider this item at the January 23, 2012 Committee of the Whole and subsequent February 6,
2012 Regular meeting.
Attachment: King County Form A B
W \PW Eng \PROJECTS\A- RW RS Projects\91110402 (Bridge Inspections 2011) \BAR Bridge Repair TC memo.doc
Form A Detailed Information
Request TK -003
Date Submitted: 10/27/2011
Problem Description: Tukwila bridge number TUK 12. Undermining of the west approach to
the Boeing Access Road Bridge over railroads. A void has developed that needs to be filled. The
approach is non structural and not intended to "bridge" a void. Potential safety problem.
Nature of Request: King County has provided bridge inspection services. Tukwila and its
consultants have designed a proposed repair. This request is for King County to provide the
necessary construction services, in accordance with the prepared plans, to fill the void that has
developed. (Plans have been provided to KC bridge group.) Tukwila will provide traffic control.
Location: Boeing Access Road west approach to the bridge over BNSF Burlington Northern and
Union Pacific Railroads. TUK 12
Attachments:
Scope of Work: No
Engineering Design: No
Map: No
Budget: No
City Priority: High
Special Scheduling Requirements: Traffic volumes are very high. Weekend work may be
necessary in order to close portions of the roadway to keep traffic off the roadway as the fill
material sets up.
City Project Manager: Robin Tischmak 206 431 -2455
Authorized By: Robin Tischmak
Form B Detailed Information
Project
Work Order
Recommended Action: Fill void under west approach slab per design plans provided by the
City. City will provide necessary traffic control and necessary notification.
Proposed Schedule: November /December 2011
County Project Manager: Richard Hovde/Ross Pettit
Cost Estimate: $67,000
Authorized By (City):
Date:
Comments: