HomeMy WebLinkAboutTIC 2017-10-24 Item 2B - Contract Amendment #3 - Fort Dent Park BNSF Sewer Relocation with KPFF Consulting Engineerslla
INFORMATIONAL MEMORANDUM
TO: Transportation and Infrastructure Committee
FROM: Robin Tischmak, Acting Public Works Director k�
BY: Mike Cusick, Senior Program Manager
DATE: October 20 2017
SUBJECT: Fort Dent Park BNSF Sewer Relocation -Design
Project No. 91530101, Contract No. 15-054
Amendment No. 3
ISSUE
Approve Amendment No. 3 with KPFF Consulting Engineers (KPFF), Inc.
Allan Ekberg, Mayor
BACKGROUND
In 2015, the City contracted with KPFF to design the relocation of the sanitary sewer force main
required by BNSF as the railroad is adding a third set of tracks.
DISCUSSION
KPFF omitted from their original project scope the cathodic protection of the steel casing under the
BNSF tracks that is required by the railroad. Additional time is also needed by the consultant to
complete the plans and specifications for the relocation of the sanitary sewer force main due to the
slow review of the documents by BNSF.
FINANCIAL IMPACT
The additional $7,876.20 required for the design of the cathodic protection system will be coming from
the 2017 construction budget for the Fort Dent BNSF Sewer Relocation Project.
2015 Design Contract with KPFF
2017 Supplement Agreement No. 3
TOTAL
Agreement Budget for 2017
$ 156, 877.00
7,876.20
$164,753.20 $ 844.000.00
RECOMMENDATION
Council is being asked to approve Supplemental Agreement No. 3 to Contract No. 15-054 with KPFF
Consulting Engineering for the Fort Dent Park BNSF Sewer Relocation Project in the amount of
$7,876.20 and consider this item on the Consent Agenda at the November 6, 2017 Regular Meeting.
Attachments: Page 82 of 2017 CIP
KPFF Amendment No. 3
W:IPW EngIPROJECTSW- PK Projects\Fort Dent Park BNSF Sewer Relocation (91530101)Unfo Memo KPFF Amend No 3102017.docx
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CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2017 to 2022
PROJECT: Fort Dent Park BNSF Sewer Relocation Project No. 91530101
DESCRIPTION: The installation of 510 fee of sewer force main under the BNSF railroad tracks.
JUSTIFICATION: The BNSF Railroad is constructing a third set of tracks and is requiring that the City relocate the sewer
force main under the railroad tracks.
STATUS: Funding is required for the sewer relocation that was installed in 1975.
MAINT. IMPACT: Normal maintenance once relocated.
COMMENT:
FINANCIAL Through Estimated
in $000's
2015 2016 2017
2018
2019
2020
2021
2022
BEYOND TOTAL
EXPENSES
Project Location
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Design
50
75
32
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157
Land (R/W)
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0
Const. Mgmt.
128
128
Construction
844
844
TOTAL EXPENSES
50
75
1,004
0
0
0
0
0
0
1,129
FUND SOURCES
Awarded Grant
0
Proposed Grant
0
Mitigation Actual
0
Mitigation Expected
0
Utility Revenue
50
75
1,004
0
0
0
0
0
0
1,129
TOTAL SOURCES
50
75
1,004
0
0
0
0
0
0
1,129
2017 - 2022 Capital Improvement Program
82
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Project Location
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2017 - 2022 Capital Improvement Program
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14
SUPPLEMENTAL AGREEMENT NUMBER 3 to
CONSULTANT AGREEMENT NUMBER 15-054
This SUPPLEMENTAL AGREEMENT is entered into between the City of Tukwila,
Washington, herein after referred to as "the City" and KPFF Consulting Engineers
hereinafter referred to as "the Consultant", in consideration of to the mutual benefits,
terms, and conditions hereinafter specified.
The City desires to supplement the agreement entered into with the Consultant and
executed on, March 18th, 2015 and identified as Agreement No. 15-064. 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:
Cathodic Protection Background
The purpose of this supplement is to prepare cathodic protection system design and
specifications to the bid package for cathodic protection for the steel sleeve that carries the
sewer force main under the BNSF rail tracks and extend the time for the consultant to
complete the design package.
SCOPE: ON SITE TESTING
The testing will involve collecting in-situ soil resistivity at various depths at accessible
locations to determine the electrically conductive of the soil.
1. Conduct on-site soils testing at locations of the casing crossing. Measure soil
resistance at depths of 2.5, 5.0, 7.5, 10, and 15 -foot depths. This testing will involve
passing a known current through appropriately installed soil pins and calculating
resistance based upon voltage levels. This testing will not require excavation.
2. Collect two soil samples for laboratory analysis. The analysis will determine soil pH,
chloride, and sulfate levels in order to classify corrosive characteristics.
3. Provide a report detailing the results of the testing along with recommendations for
corrosion control strategies should the soil prove to be corrosive to steel materials.
BUDGET/SCHEDULE
The field testing with laboratory analysis results will be within ten days after soil collection.
The cost for completing these tasks will be $2,130.23.
SCOPE: COATINGS AND CATHODIC PROTECTION DESIGN
Based upon the results of the soil corrosivity analysis, provide a protective coating
specification for the external surfaces of the sewer casing.
Page 1 of 2
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2. Provide a cathodic protection system design (drawings and specification) to
supplement the protective coating. The design will provide corrosion control to
locations of coating damage that may occur during installation, including at welded
connections that may not be coated. It is anticipated that the system will utilize
galvanic anodes which will not require external power. This installation of the
coating and cathodic protection system will add an estimated 30 years to the useful
life of the casing.
3. Provide a review of final project documents.
4. The design documents will be submitted in .pdf, .docx, and .dwg format.
BUDGET/SCHEDULE
The tasks associated with the design portion of this proposal are estimated to be
$5,745.97. All work will be billed on a time and materials basis in accordance with the
attached cost breakout.
SCOPE: TIME FOR PROJECT COMPLETION
The time for completion of the project is extended from December 31, 2017 to December
31, 2018.
All other provisions of the contract shall remain in full force and effect.
PAYMENT: SHALL BE AS FOLLOWS
Payment for the work provided by the Consultant as part of this supplement shall be made
for an additional $7,876.20. The total amount for the Consultant for this contract shall not
exceed $164,753.20 without express written modification of the Agreement signed by the
City.
Dated this
day of , 20
CITY OF TUKWILA CONSULTANT
Allan Ekberg, Mayor Printed Name: PA-R.?:r Stc.�
ATTEST/AUTHENTICATED APPROVED AS TO FORM
Christy O'Flaherty, MMC, City Clerk City Attorney
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