COMMISSION 
AGENDA MEMORANDUM                        Item No.          8j 
ACTION ITEM                            Date of Meeting     December 14, 2021 

DATE:     November 9, 2021 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Susie Archuleta, Real Estate Manager 
Rod Jackson, Capital Project Manager 
Melinda Miller, Director, Portfolio and Asset Management 
SUBJECT:  WTCW Roof Replacement (CIP # 801104) Design Funding Authorization Request 

Amount of This Request                   $  175,000 
Total estimated project cost               $  2,284,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director  to develop design documents,
execute professional service contracts, apply for permits and to prepare construction documents
for the World Trade Center West Roof Replacement.  Total request for this action will be
$175,000 for a total project cost of $2,284,000.
EXECUTIVE SUMMARY 
The World Trade Center West (WTCW) Building was built in 1998 and is 23 years old. Its' existing
ballasted gravel roof is original to the structure and is nearing the end of its service life. This
project will extend the service life of existing WTCW roofing system via repair, overlay and 
replacement,  based  on  recommendations  contained  in  a third-party  assessment  study
completed on January 9, 2019. Due to funding priorities over the past few years, this roof project
was deferred but is now ready to move forward due to its critical need. The proposed project is
intended to provide reuse of existing ballasted roofing, membrane, and insulation. The project
includes installing  additional insulation  including another  80-mil  membrane overlay while 
considering the possibility of adding Green Roof Technology to the building roof top. This will
provide an energy efficient and sustainable replacement roof and will have a design service life
of 30 years.
The project is currently in the preliminary design/construction documentation phase, with
preliminary design documents at the 30% stage of completion. 
JUSTIFICATION 
This project supports the following Century Agenda objectives: 

Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. 8j                                   Page 2 of 6 
Meeting Date: December 14, 2021 
1.  Position the Puget Sound region as a premier international logistics hub. 
2.  Advance this region as a leading tourism destination and business gateway. 
3.  Use the Port's influence as an institution to promote women and minority business
enterprise (WMBE) growth, small business growth, and workforce development. 
4.  Be the greenest, and most energy-efficient port in North America. 
Further, the project supports the following additional imperatives 
A.  Protect Existing Assets 
Ensure that its complex roofing system maintains its watertight integrity.
B.  Reduce Unplanned Maintenance Costs 
Mitigate future costs related to roof leaks, including rot, mold, and corrosion. 
C.  Mitigate Impacts to Existing Business Operations 
Coordinate with WTCW building tenants and work around scheduled business events. 
D.  Employ Sustainable Means and Methods 
Incorporate environmentally sustainable practices during construction where practical. 
Diversity in Contracting 
The design portion is under an existing IDIQ which was established prior to the Diversity in
Contracting program. This IDIQ has a 17% small business goal associated with it. The Diversity in
Contracting Department will set a woman and minority business enterprise (WMBE) aspirational
goal for the construction portion. 
DETAILS 
The roof is original to the WTCW building. The existing ballast, membrane, and insulation will be
reused to save on material disposal costs. Adding additional insulation per code and overlaying
with an additional 80mil membrane will increase the life of the roofing system to 30+ additional
years. The addition of the Green Roof Technology will further the life of the roofing system by
eliminating ultraviolet sun rays from deteriorating the roof membrane. The total project cost of
the recommended alternative is estimated to be $2,284,000 which is $935K more than the least
expensive option, Alternative 2 estimated to be $1,349,000. Funding for this project was
included in the 2022 capital budget plan of finance. 
Scope of Work 
The scope of work for the WTCW Roof Upgrade project includes the evaluation and design for: 
(1)   Reuse of existing gravel ballast to eliminate waste. 
(2)   A new energy-efficient ballasted roofing system that includes additional insulation while
including an option for a Green Roof technology, 
(3)   Evaluate the existing roof top fall protection system, 

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

COMMISSION AGENDA  Action Item No. 8j                                   Page 3 of 6 
Meeting Date: December 14, 2021 
(4)   Use environmentally sustainable components and methods as appropriate, 
such as: waste minimization  and selecting materials with limited toxicity and
greenhouse gas emissions. 
Schedule 
Activity 
Commission design authorization               December 14, 2021 
Final design start                                   December 2021 
Commission construction authorization          Q2 2022 
Construction start                                Q3 2022 
In-use date                                       Q1 2023 
Cost Breakdown 
This Request           Total Project 
Design                                                    $175,000               $300,000 
Construction                                                      0             $1,984,000 
Total                                                           $175,000              $2,284,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Do nothing, Maintain the current state and delay upgrades to the roof.
Maintenance costs of $5K annually (averaged over 12 months) will continue. 
Capital Cost: $5K 
Pros: 
(1)   Saves Port funding. 
(2)   Allows port to reallocate capital investment dollars. 
Cons: 
(1)    Does not advance efforts to achieve Century Agenda goals. 
(2)    Increases the chances that water infiltration will disrupt tenant activities and damage
the interior of the facility causing expensive repairs. 
(3)    Increase of future construction costs is likely and the risk of emergency repair costs will
continue to increase. 
(4)    The cost of a future roofing project and additional repairs in the event of roof failure
would be the full cost of replacement ($2.28 million) plus escalation and the cumulative
ongoing expense costs. Risk of the cost of lost tenant space due to emergency repairs
is unknown but likely would be high. 
(5)    Safety of the tenant could be compromised due to the slip hazard to tenant and
employees. 
(6)    Maintenance costs will continue. 

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

COMMISSION AGENDA  Action Item No. 8j                                   Page 4 of 6 
Meeting Date: December 14, 2021 
This is not the recommended alternative. 
Alternative 2: - Upgrade and install a new membrane roof and additional insulation while reusing
existing gravel ballast to provide a 30-year service life. 
Capital Cost: Minimum of $1.34M 
Pros: 
(1)    Advances Century Agenda goals. 
(2)    Upgrades and replaces project elements on the existing roofing system with various
roof applications that have a 30-year life. 
(3)    The  cost  of  Alternative  2  is  approximately  $935K  less  than  the  recommended
Alternative 3. 
(4)    Repairing and replacing various roof elements will provide the lowest total cost of
ownership. 
(5)    Helps to assure a stronger positive tenant experience and avoids potential safety
hazards. 
(6)    Proactive maintenance provides protection of Port assets. 
(7)    Provide for a warranted roof that will minimize the cost of repairs going forward for the
foreseeable life of the roof. 
Cons: 
(1)    This alternative uses $1.34M of capital funds that might otherwise be made available
for other uses on other projects. 
(2)    Additional ballast may be required once the re-used ballast is in place over the new
membrane.
This is not the recommended alternative. 
Alternative 3: - Upgrade and install a new membrane overlay and additional insulation while
reusing existing gravel ballast including the installation of a Green Roof Technology that will have
a 30+ year life. 
Capital Cost: Minimum of $2.28M 
Pros: 
(1)    Advances Century Agenda goals. 
(2)    Upgrades and replaces project elements on the existing roofing system with various
roof applications that have a 30+ year life. 
(3)    The 30+ year life span of this roof system will protect this Port asset, serving the Port
and the tenants well. 
(4)    Repairing and replacing various roof elements will provide a lower total cost of
ownership than Alternate 2. 
(5)    Helps to assure a stronger positive tenant experience and avoids potential safety
hazards. 

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

COMMISSION AGENDA  Action Item No. 8j                                   Page 5 of 6 
Meeting Date: December 14, 2021 
(6)    This project would provide for a warranted roof that will minimize the cost of repairs
going forward for the foreseeable life of the roof. 
(7)    Upgrading to Green Roof Technology conceals the roof from harmful ultraviolet light
and sun rays, extending the life of the roof. 
(8)    The live areas of the Green Roof will produce oxygen, provide stormwater retention, 
and also create habitat and a stopping point for pollinators. 
(9)    Substituting areas of ballast with a Green Roof reduces the heat load to the building 
and therefore reduces reliance on the HVAC system for cooling. 
Cons: 
(1)    This alternative uses $2.28M of capital funds that might otherwise be made available
for other uses on other projects.
(2)    The cost of Alternative 3 is approximately $935K more than Alternative 2. 
(3)    Minor weed removal may be needed twice per year at a cost of $1.5K per year. 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary            Total 
COST ESTIMATE 
Original estimate                                 $2,284,000 
AUTHORIZATION 
Previous authorizations                            $125,000 
Current request for authorization                  $175,000 
Total authorizations, including this request         $300,000 
Remaining amount to be authorized            $1,984,000 
Annual Budget Status and Source of Funds 
This project has been included in the 2022 Plan of Finance under C801104 P66 World Trade
Center West Roof Replacement at an estimated total project cost of $1,676,000. The additional 
estimated cost of $608,000 will be funded by C800216 EDD Reserve. 
This project will be funded by the General Fund. 
Financial Analysis and Summary 
Project cost for analysis              $2,284,000 
Business Unit (BU)                  Portfolio Management 


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

COMMISSION AGENDA  Action Item No. 8j                                   Page 6 of 6 
Meeting Date: December 14, 2021 
Effect on business performance     The project will maintain annual gross revenue of $1.4 
(NOI after depreciation)             million from WTCW. Depreciation will increase by
$152,267 per year, thereby reducing the NOI by the same
amount. 
IRR/NPV (if relevant)                No incremental revenue. The NPV is the present value of
the project cost. 
CPE Impact                       N/A 
Future Revenues and Expenses (Total cost of ownership) 
This upgrade will provide protection of Port assets and extend their useful life while redesigning 
the roof system to also achieve environmental goals. Maintaining existing assets and enhancing
their environmental performance will preserve the economic vitality of our operations and serve
the Port, tenants, and their customers well. 
Environmental Summary: 
This project is Tier 2 under the Sustainable Evaluation Framework. Third-party certification is not
being pursued due to the project's limited scope (roof replacement), but green design options 
are being considered. Opportunities to reduce the building's and construction project's carbon
footprint are being explored. Solar opportunities were explored but eliminated from scope due
to weight, building positioning, and potential glare hazards. As stated above, application of a
green roof is being considered. 
The WTCW Building Ballasted Roof Replacement Project demonstrates the value of sustainable
project evaluation processes which consider social, environmental, and economic benefits
holistically. Sustainability goals include energy efficiency, environmental health, sustainable asset
management, material reuse, financial sustainability, and tenant impacts. These goals will be
considered to identify a recommended alternative that maximize objectives while balancing costs
and project objectives. 
ATTACHMENTS TO THIS REQUEST 
(1)   Sustainable Design Approach (SDA) 
(2)   Presentation 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
None. 



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