T5 Dredging Additional Funding
Item No.: 8k_supp
Date of Meeting: December 12, 2023
T5 Dredging Additional Funding
• Request Commission authorization for the Executive Director
to increase the total costs not to exceed from $1,100,000 to
$3,500,000 for executing a change order for upland disposal of
a portion of the T5 Dredging Project under Port of Seattle
management, Master Identification No. U00680.
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Project Location
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Background
• This project is associated to the T5 Berth Modernization
Project (U00100). Because legacy contaminated soil is
considered a Homeport responsibility per section 3.2(a) of the
NWSA Charter, U00680 was created for upland disposal
separate from the Northwest Seaport Alliance T5
Modernization Project. This project will be booked as operating
expense to Port of Seattle Joint Venture as it is separate from
the NWSA T5 Modernization Capital Project.
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Background cont.
• Unexpected sheen was discovered resulting in an additional
3,200 CY of dredged material for upland disposal.
• Another 2,500 CY of dredging required due to under-dredging
and will be required to go to an upland disposal facility.
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Areas of Under-Dredge
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Schedule
Commission Construction Authorization November 2021
ERL Construction Start December 2022
Commission Authorization Additional Funds December 2023
Phase III Dredging Start December 2023
Substantial Completion December 2023
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Authorization Summary
AUTHORIZATION
Previous authorizations 0 $1,100,000 $1,100,000
Current request for authorization 0 $2,400,000 $2,400,000
Total authorizations, including this
request
0 $3,500,000 $3,500,000
Remaining amount to be authorized $0 $0 $0
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Cone of Certainty
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Authorization Request/Next Steps
Total amount of this request: $2,400,000
Next Steps:
• Complete Phase II Dredging
• Complete by December 31, 2023
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