COMMISSION 
AGENDA MEMORANDUM                        Item No.          10d 
ACTION ITEM                            Date of Meeting    September 12, 2023 

DATE:     August 25, 2023 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Stephanie Jones Stebbins, Managing Director, Maritime 
Arthur Kim, Capital Project Manager III, Waterfront Project Management 
SUBJECT:  West Waterway Deepening (CIP# 800593) 
Amount of this request:               $4,000,000 
Total requested project cost:         $29,500,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to (1) Execute a Design Agreement
and all other documents associated with the US Army Corps of Engineers for the Preconstruction
Engineering and Design phase of the West Waterway Channel Deepening Project, and (2)
Authorize the Preconstruction Engineering and Design Phase of the West Waterway Channel
Deepening Project, including execution of outside services contracts and service directives, for
an estimated Port cost of $4,000,000. $1,500,000 was previously authorized for a feasibility study 
by the Northwest Seaport Alliance (NWSA) and another $150,000 was previously authorized for
Project Notebook development through Executive Authorization, with the total authorized
amount for the project to be at $5,650,000. 
EXECUTIVE SUMMARY 
In 2014, The Managing Members of the NWSA authorized participation in cost sharing with the
US Army Corps of Engineers (USACE) for a Feasibility Study to deepen the federal navigation
channels in the East and West Waterways for a total of $1,500,000 in NWSA’s share. In 2017,
USACE completed the Feasibility Study and in 2018 Congress authorized deepening the
navigation channels to -57’ mean lower low water (MLLW). In February 2020, USACE received
funding for moving forward with the Preconstruction Engineering and Design (PED) phase of the
West Waterway Channel Deepening Project. Deepening the navigation channels to -57’ MLLW
will keep Seattle Harbor competitive by making it fully accessible by deep-draft vessels. In 2017,
USACE estimated a total of $3,340,000 in PED phase costs. This estimates for the PED, Work-In
Kind (WIK), and construction will be adjusted once the Design Agreement is signed. The Design
Agreement (DA) commits the Port of Seattle to share 50% of the total eligible design costs, or in
cash and eligible work-in-kind. 

Template revised January 10, 2019.

             COMMISSION AGENDA – Action Item No. 10d                                 Page 2 of 5 
Meeting Date: September 12, 2023 
USACE will manage the PED phase of the project, which will include environmental permitting,
engineering, and plans and specifications for dredging the West Waterway to the newly
authorized -57’. The Port’s participation will include cash contributions and some eligible WIK, as
well as additional Port costs that are not eligible for WIK credit. USACE’s 2017 estimated total
design phase costs to the Port was $1.74 million, but due to inflation and increase in costs for
testing the overall cost to the Port is now $4,000,000. The PED phase is expected to be completed
in late 2026, at which time the Port is expected to negotiate a Project Partnership Agreement
with USACE for construction, the cost of which is estimated at $49,000,000 (2017 estimate), of
which the total Port share was estimated to be $28M (2017 estimate). 
JUSTIFICATION 
Seattle Harbor is a major gateway for regional and national exports and imports.  Ships deployed
on the U.S. West Coast have been rapidly increasing in size, and these ships need deeper drafts
for safe passage. The current Terminal 5 (T-5) Modernization Project by the NWSA already
includes deepening the berths at T-5 by 2023. If the West Waterway is not deepened, the ultralarge
vessels expected to call at T-5 will have to wait for the tides to access the terminal. The
federal channel deepening projects are funded and managed by the home ports. 
Diversity in Contracting 
The project staff, in coordination with the Diversity in Contracting Department, have set a 12%
woman and minority business enterprise (WMBE) goal for the project specific Service Agreement. 
DETAILS 
This is the design and permitting phase for deepening the West Waterway to the authorized
project depth of -57’ MLLW. The authorized West Waterway federal navigation channel is 5,400
feet long, 700 feet wide at the approach reach, and 500 feet wide at the inner reach. See attached
PowerPoint  for more details. The Seattle Harbor Navigation Improvement Project Final
Integrated Feasibility Report and Environmental Assessment was published by USACE in 2017
and is available online on USACE Seattle District’s website as well as upon request.
Scope of Work 
The PED phase of the project will include sediment characterization, permitting, engineering, and
preparing of plans and specifications for construction. Construction is not included in this
authorization. The USACE is the lead agency to perform the work. The Port participates in the
project as a local sponsor by contributing cash and WIK per attached Design Agreement.
Port’s participation under the DA includes: 
1.  Cash payments to make up the difference between Port’s WIK and Port 50% obligations 
to the overall project design costs. 
2.  2.5 years in WIK that includes: 
• Participate in USACE project delivery team. 

Template revised June 27, 2019 (Diversity in Contracting).

             COMMISSION AGENDA – Action Item No. 10d                                 Page 3 of 5 
Meeting Date: September 12, 2023 
• Sediment characterization. 
• Geotechnical engineering. 
• Limited scope environmental reviews. 
• Limited scope engineering reviews. 
• Financial administration and reporting as required per Design Agreement. 
• Participation in ship simulation workshop by Port staff, Puget Sound pilots and
tugboat operators as required by USACE. 
Additional scope of work outside the DA but within this authorization includes: 
• Any work in the area that overlaps with the T-5 berths. 
• Additional staff time beyond minimum requirements by USACE. 
• Technical support by outside consultants on an as needed basis. 
• Overhead and contingency. 
USACE estimated approximately 700K cubic yards of dredged material. During design, the
interagency Dredged Material Management Program will decide whether the material is suitable
for open-water disposal based on results of sediment characterization.  The Port is still in
negotiations with USACE and exploring options regarding beneficial use of clean (suitable)
dredged material for nearshore habitat restoration at T-5 North. The scope of work includes
design work evaluating sediment disposal strategies but does not currently include beneficial use 
of dredged sediments for nearshore habitat restoration or other purposes. 
Schedule 
USACE estimated schedule milestones: 
Commission Design authorization               2023 Quarter 3 
Design Agreement Execution                   2023 Quarter 3 
Design Kickoff                                    2023 Quarter 4 
Procure WIK Consultant                        2024 Quarter 2 
Design Completion                            2026 Quarter 3 
Cost Breakdown                                     This Request           Total Project 
Planning (Feasibility Study)                                           $0              $1,500,000 
Design                                                  $4,000,000             $4,150,000 
Construction                                                     $0            $23,850,000 
Total                                                         $4,000,000             $29,500,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1 – Do Nothing: As part of the Feasibility Study, USACE evaluated a “do nothing”
alternative. It was found to have detrimental economic impact, as deep-draft vessels would


Template revised June 27, 2019 (Diversity in Contracting).

             COMMISSION AGENDA – Action Item No. 10d                                 Page 4 of 5 
Meeting Date: September 12, 2023 
experience operational delays while waiting on the tides. Seattle will likely lose its market share
to ports that could handle these vessels most efficiently and cost effectively. 
Cost Implications: No additional capital spending for design and construction. 
Pros: 
(1)   No capital investments. 
Cons: 
(1)   Lose federal funding. 
(2)   Lose cargo market share. 
This is not the recommended alternative. 
Alternative 2 – Continue Port’s participation in the design phase to deepen the West Waterway
Channel to -57’ MLLW. 
Cost Implications: $4,000,000 
Pros: 
(1)   Leverage federal funding of $1,670,000. 
(2)   Ensure Seattle Harbor remains competitive. 
Cons: 
(1)   Commits Port cost share in cash and in-kind services during design. 
(2)   Future construction costs to the Port, estimated to be $23,850,000 starting as early as
2026, is not included in this authorization. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
USACE Feasibility study level estimate for Port of Seattle (POS) share from 2017; subject to
change after design. 
Cost Estimate/Authorization Summary                                                POS           NWSA          Total 
COST ESTIMATE 
Original estimate (USACE)                      $28,000,000      $1,500,000              $0 
AUTHORIZATION 
Previous authorizations                            $150,000      $1,500,000      $1,650,000 
Current request for authorization                $4,000,000               $0      $4,000,000 
Total authorizations, including this request       $4,150,000      $1,500,000      $5,650,000 
Remaining amount to be authorized           $23,850,000             $0    $23,850,000 


Template revised June 27, 2019 (Diversity in Contracting).

             COMMISSION AGENDA – Action Item No. 10d                                 Page 5 of 5 
Meeting Date: September 12, 2023 
Annual Budget Status and Source of Funds 
This project was included in the 2023 Draft Plan of Finance under C800593 with a total estimated
cost of $28,000,000 (POS share).
This project will be funded by the Tax Levy. 
Financial Analysis and Summary 
Project cost for analysis              $29,500,000 ($28M POS share) 
Business Unit (BU)                  POS Joint Venture 
Effect on business performance     This project will support cargo operations for properties
(NOI after depreciation)             licensed to the NWSA, including the redevelopment of
Terminal 5.
IRR/NPV (if relevant)                NA 
CPE Impact                       N/A 
Future Revenues and Expenses (Total cost of ownership) 
The feasibility study estimates maintenance dredging will be needed approximately every 10 
years at a cost of approximately $1.4M to the Port (assumes 50% cost share with USACE). 
ATTACHMENTS TO THIS REQUEST 
(1)   Design Agreement with USACE 
(2)   Presentation 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
December 3, 2019 – The Managing Members of NWSA were briefed on Seattle Harbor
Deepening project. 
December 5, 2017 – The Managing Members of NWSA were briefed on Seattle Harbor
Deepening project. 
December 5, 2017 – The Managing Members of NWSA authorized the Executive Director of
the Port of Seattle to sign Letters of Agreement with the Muckleshoot Indian Tribe and
Suquamish Tribe for impacts to treaty reserved fishing access related to the US Army 
Corps of Engineers Seattle Harbor Navigation Improvement Project. 
August 19, 2014 – The Managing Members of NWSA authorized the Chief Executive Officer
to sign a Feasibility Cost Sharing Agreement with U.S. Army Corps of Engineers committing
to $1.5M in cost share.  



Template revised June 27, 2019 (Diversity in Contracting).