Meeting_Body
CONSTRUCTION COMMITTEE
JANUARY 18, 2018
Subject
SUBJECT: DIVISION 20 PORTAL WIDENING TURNBACK PROJECT
Action
ACTION: APPROVE CONTRACT MODIFICATION
Heading
RECOMMENDATION
Title
CONSIDER:
A. AUTHORIZING the Chief Executive Officer to execute Contract Modification No. 4 to Contract No. AE66758000 with T.Y. Lin International (TYLIN) to provide additional final design engineering services for the Division 20 Portal Widening Turnback Project, in an amount not-to-exceed $3,449,949, increasing contract value from $12,225,661 to $15,675,610;
B. AUTHORIZING an increase in Contract Modification Authority from $2,053,132 to $3,053,132 for potential design modifications due to Third Party coordination and extended design services during construction; and
C. AMEND the FY18 budget for an amount not to exceed $25M to support recommendations A, B and for the acquisition of real property and related costs including loss of good will and relocation for properties required for the Division 20 Portal Widening Turnback Project.
Issue
ISSUE
Per the Full Funding Grant Agreement (FFGA) for the Westside Purple Line Extension (WPLE) Section 1, Metro committed to make appropriate infrastructure modifications to allow the Red and Purple Lines to operate at reduced headways. These requirements were carried forward as like provisions under the terms of the FFGA for WPLE Section 2. The current design contract for the Division 20 Portal Widening Turnback Project as approved in a March 2017 Board Action included the widening of the existing tunnel portal and construction of a turnback facility.
As preliminary engineering has progressed, modeling for achievement of 4-minute headways and modifications to the turnback layout have produced significantly improved turnback and additional storage capacity for the Red and Purple Line, necessitated by the increased capacity needs generated by completion of WPLE Section 3 in addition to Sections 1 and 2, as well as syst...
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