HomeMy WebLinkAboutTIS 2023-12-04 Item 1D - Contract Supplement #4 - West Valley Highway (I-405 - Strander Boulevard) Design with TranTech EngineeringCity of Tukwila
Allan Ekberg, Mayor
Public Works Department - Hari Ponnekanti, Director/City Engineer
INFORMATIONAL MEMORANDUM
TO: Transportation and Infrastructure Services Committee
FROM: Hari Ponnekanti, Public Works Director/City Engineer
BY: Cyndy Knighton, Senior Program Manager
CC: Mayor Ekberg
DATE: December 1, 2023
SUBJECT: West Valley Highway (1-405 — Strander Boulevard)
Project No. 99310410, Contract No. 19-095
Supplemental Agreement No. 4
ISSUE
Supplemental Agreement with TranTech Engineering for the design on the West Valley Highway (1-405 —
Strander Boulevard) Project. The Supplemental Agreement will increase the contract by $59,520, for a
new total of $1,325,354.
BACKGROUND
Since September 2019, TranTech Engineering has been working on the design and construction
management of the West Valley Highway project including improvement along Longacres Way. Currently,
the project has funding for construction from two grant sources: Transportation Improvement Board and
Sound Transit System Access Funds. The project is also on the Traffic Impact Fee list. Construction started
in 2022 and was expected to be completed by the end of the year, but supply chain issues specific to
signal and light poles forced a winter shutdown last fall. Work resumed by the City's contractor, Road
Construction Northwest, in May of this year.
DISCUSSION
Once the work began again this spring, new issues arose that have added further delay to the completion
of the project. The work is nearly physically complete at this time, but some items still remain incomplete
such as fabrication and installation of a new mast arm at the Longacres Way/West Valley Highway
intersection and getting electrical connections completed by Puget Sound Energy so that the new
streetlights and RRFB on Longacres Way can be energized. Delays result in additional time and funds
being required for the construction management support from TranTech.
FINANCIAL IMPACT
The increase in fee for the additional construction management effort totals is $59,520. Budget is available
for the increase through the remaining construction contingency, which is partially reimbursable through
the two grants.
CM Increase
Fee Fund Source
$59,520 Available contingency
Budgeted
$465,220.61
RECOMMENDATION
The Council is being asked to approve the Supplemental Agreement No. 4 to Contract No. 19-095 with
TranTech Engineering in the amount of $59,520, for a total of $1,325,354 and consider this item on the
Consent Agenda at the December 11, 2023 Special Meeting.
ATTACHMENTS
• Consultant Agreement
69
j7, Washington State
Department of Transportation
Supplemental Agreement
Number 04
Organization and Address
TranTech Engineering, LLC
365 118th Ave SE Suite 1000
Bellevue, WA 98005
Phone: 425 453-5545
Original Agreement Number
19-095
Project Number
99310410
Execution Date
June 11, 2019
Completion Date
December 31, 2024
Project Title
Tukwila West Valley Highway (I-405 to Strander Boulevard)
New Maximum Amount Payable
$1,325,354
Description of Work
The project consists of preparing preliminary engineering design, environmental studies and permitting for
improvements to both Longacres Way and West Valley Highway (SR181), and preparing final design and
contract documents for West Valley Highway. The proposed improvements include widening the highway to
7 lanes, bridging over the 60-in. Seattle Public Utilities water main, a new pedestrian signal, a shared use
sidewalk and other related engineering tasks. ROW acquisition is not anticipated.
The Local Agency of City of Tukwila
desires to supplement the agreement entered in to with TranTech Engineering, LLC
and executed on June 11, 2019 and identified as Agreement No. 19-095
All provisions in the basic agreement remain in effect except as expressly modified by this supplement.
The changes to the agreement are described as follows:
Section 1, SCOPE OF WORK, is hereby changed to read:
Additional CN Phase work, see Exhibit A - Scope of Work for details.
I I
Section IV, TIME FOR BEGINNING AND COMPLETION, is amended to change the number of calendar days
for completion of the work to read December 31, 2024
III
Section V, PAYMENT, shall be amended as follows:
Additional budget of $59,520 - see Exhibit D for details.
as set forth in the attached Exhibit A, and by this reference made a part of this supplement.
If you concur with this supplement and agree to the changes as stated above, please sign in the Appropriate
spaces below and return to this office for final action.
By: Mohammad Sheikhizadeh, Project Manager By.
Consultant Signature Approving Authority Signature
DOT Form 140-063
Revised 09/2005
Date
70
Exhibit "A"
Summary of Payments
Basic
Agreement
Supplement #4
Total
Direct Salary Cost
$420,930
$19,752
$440,682
Overhead
(Including Payroll Additives)
$658,716
$26,914
$685,630
Direct Non -Salary Costs
$123,849
$6,928
$130,777
Fixed Fee
$62,339
$5,926
$68,265
Total
$1,265,834
$59,520
$1,325,354
DOT Form 140-063
Revised 09/2005
71
EXHIBIT A
Supplement 04
West Valley Highway (Strander Blvd to 1-405) Improvements Project
Introduction
The City of Tukwila (AGENCY) has retained TranTech Engineering, LLC (CONSULTANT) to provide Construction
Management During Construction. The following describes Supplement 04 to this work.
Scope of Work
8. Construction Management
• Extension of contract past the working days. Due to PSE power issues, additional WSDOT
coordination with Hawk mast arm and WHV / Longacres signal mast arm.
• Additional change order preparation and independent cost estimates beyond our scope. Original
scope had 3, we are working on 8-9.
• Additional site inspection time beyond original scope.
• Response to 52 RFI, original scope had 4.
• Additional design costs for Transpo for Hawk and Longacres revised Mast arms design.
West Valley Highway (Strander Blvd to 1-405)
1
72