T18 Maintenance Dredging Additional ERL
Funding
Arthur Kim – Capital Project Manager, Waterfront Project Management
Stephanie Jones Stebbins – Managing Director, Maritime
Item No.: 8f_supp
Date: October 14, 2025
Action Request
Request Commission authorization for the Executive Director to
increase the total costs not to exceed from $1,000,000 to
$2,000,000 for additional environmental remediation liability
(ERL) funding for upland disposal of additional contaminated
sediment from the T18 Maintenance Dredging Project, Master
Identification No. N10746.
2
T18 Bathymetric Survey
3
Background
• Sediment testing in 2025 showed all dredged material for the
project as unsuitable for open water disposal and must be
disposed at an approved upland facility.
• Initial construction estimates anticipated 3,600 CY of material.
• Final design revised the volume to 6,000 CY.
• Additional ERL funding is required for the additional 2,400 CY
of material.
4
Project Objectives
• Dredge an additional 2,600 CY of material unsuitable material
for open water disposal.
• Dispose of all material at an approved upland facility.
• Place 9” of clean sand cover over the dredged areas as
required by regulatory agencies.
5
Project Cost Details - NWA
6
Project Cost Details – POS ERL
7
Project Schedule
8
Anticipated DateItem
Q3 2025Commission – Construction Authorization
Q1 2026Construction start
Q1 2026Substantial Completion
Q3 2026Final Completion
Cone of Certainty
9
We are here
Questions?
10
