West Waterway High Spots Dredging
Stephanie Jones Stebbins – Managing Director, Maritime Division
Arthur Kim – Capital Project Manager, Waterfront Project Management
Item No.: 8e_Supp
Date of Meeting: December 10, 2024
Action Requested
Commission Authorization Request:
Request Commission authorization for the Executive Director to
approve design authorization to complete design development
and permitting for the West Waterway High Spots Dredging
project (N99969). The total request for this action is $300,000 for
a project total authorization of $7,000,000.
2
Background
The Puget Sound Pilots can only navigate the largest container
ships into Terminal 5 (T5) during specific windows due to high
spots in the Duwamish West Waterway’s federal navigation
channel which causes delays to operations and last-minute
shuffling of resources.
3
1. Remove approximately 20,000
cubic yards of material in
designated high spots to a depth
of -50 feet mean lower low
water.
2. Address the urgent needs of the
high spots 17+ months ahead of
the West Waterway Deepening
Project.
Project Objectives
4
• Maintenance dredge the
designated high spots at
locations B & C to a depth of -50’
mean lower low water.
• Dispose of all sediment at an
approved uplands facility.
• Other high spots with less
priority are not part of this
project.
Project Scope
5
Costs
6
Cost Estimate/Authorization Summary Capital Expense Total
Original estimate $0 $7,000,000
$7,000,000
Previous authorizations $0 $100,000
$100,000
Current request for authorization $0 $300,000
$300,000
Total authorizations, including this
request $0 $400,000
$400,000
Remaining amount to be authorized $0 $6,600,000
$6,600,000
COST ESTIMATE
AUTHORIZATION
Project Schedule
7
Action Requested
Commission Authorization Request:
Request Commission authorization for the Executive Director to
approve design authorization to complete design development
and permitting for the West Waterway High Spots Dredging
project (N99969). The total request for this action is $300,000 for
a project total authorization of $7,000,000.
8
Questions?
9
