HomeMy WebLinkAboutTrans 2007-02-26 Item 3A - Discussion - Scope of Work for Tukwila International Boulevard Phases II and III (South 116th Street to South 138th Street)
INFORMATION MEMO
To:
From:
Date:
Subject:
Mayor Mullet
Public W orks Directo~
February 21,2007
Tukwila International Blvd - Phases 2 and 3 (S 116 tb St to S 13Stb St)
Project Scope Changes and Proposed Bidding Alternatives
Project No. 95-RW03
ISSUE
Discuss and fmalize the scope of work for bidding and construction purposes.
BACKGROUND
This project was presented to the City Council in November 2004 to discuss the project budget and
design alternatives in order to proceed into fInal design of the project. At that time, the selected
alternative was estimated to cost approximately $16.15 million with a budget of $16.2 million. Since
that time, the design has progressed to 90% completion and the estimated construction costs have
escalated to $20.2 million. The increased cost estimate and possible cost saving measures were
presented to the Council in November 2006. Cost saving measures included eliminating the
conversion of overhead utilities to underground facilities, using different cost-effective retaining
walls, and eliminating some of the proposed improvements within the WSDOT limited access right-
of-way. These cost reductions were estimated to bring the construction project back within the
available budget of $16.2 million.
During the discussion at the November 2006 Council meeting, there were concerns regarding the
elimination of the undergrounding of overhead utilities. Subsequent inquiries since November into
additional funding sources to close the funding gap have been unsuccessful. '
ANALYSIS
This project must move forward into construction to avoid the possibility of losing grant funding and
the entire 2007 construction season. The implementation of cost saving measures is necessary. A
compromise to allow the project to move forward is to implement the cost saving measures listed
above and to use that design as the base bid. An additive alternate to the base bid would include
undergrounding of the overhead utilities in front of the Intergate West and Homeland Security
buildings, which could be included in the bid package for award if favorable bids were received and
there is adequate existing budget.
RECOMMENDATION
Proceed with a fmaldesign for bidding that implements all cost saving measures, but includes the
undergrounding of utilities in front of the Intergate West and Homeland Security buildings as an
additive alternate to the base bid.
(p:Projects\A- RW & RS Projects\95RW03 TIB2\Memo Additive All)
/