COMMISSION 
AGENDA MEMORANDUM                        Item No.          8d 
ACTION ITEM                            Date of Meeting       April 27, 2021 

DATE:     April 9, 2021 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Tina Soike, Engineering Director 
Janice Zahn, Assistant Engineering Director, Construction Services 
SUBJECT:  Main Terminal Low Voltage System Upgrade (CIP # C800061) 
Amount of this request:                       $0 
Total estimated project cost:        $100,300,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to execute a change order to
Contract  MC-0301904   Main  Terminal  Low  Voltage  System  Upgrade      General
Contractor/Construction  Manager  (GC/CM)  Preconstruction  Services  Agreement  for  the
remaining preconstruction services portion of the GC/CM contract with M. A. Mortenson
Construction Inc. for work to be performed at Seattle-Tacoma International Airport (SEA). The
amount of the change order is $1,500,000 for a revised total Not-to-Exceed (NTE) contract
amount of $3,000,000. 
EXECUTIVE SUMMARY 
This change order will increase the NTE amount of MC-0301904 Main Terminal Low Voltage
System Upgrade  GC/CM Preconstruction Services Agreement in the amount of $1,500,000 to
be paid to the GC/CM contractor on a time and material basis for actual work performed. The
revised contract amount will be $3,000,000. 
This change order request requires no additional budget (zero dollars) because it can be
accommodated within the previously authorized budget of $30,733,000, and it requires no
additional time (zero days) because it can be accommodated within the existing contract
schedule parameters. 
The GC/CM contract was executed with M.A. Mortenson by the Port of Seattle (Port) on 
August 9, 2019,  with an initial Not-to-Exceed amount of $1,500,000  and  an estimated
performance period of three (3) years.  On August 18, 2020 an Electrical Contractor/Construction
Manager (EC/CM) contract was executed with VECA Electric & Technologies (VECA). In November 

Template revised January 10, 2019.

COMMISSION AGENDA  Action Item No. 8d                                  Page 2 of 6 
Meeting Date: April 27, 2021 
2020 both Mortenson and VECA mobilized and began providing preconstruction services under
this contract.  At the time of the initial agreement, it was expected additional funds would be
needed to support the preconstruction services being provided by the GC/CM and EC/CM,
although the full level of effort and services needed was difficult to fully quantify. Therefore, the
Port and Mortenson agreed to begin with the initial Not-to-Exceed (NTE) funding of $1,500,000
and increase the NTE amount once the full level of effort and costs for the services could be more
accurately defined.
Description of Change Order 
This change order will increase the NTE amount of MC-0301904 Main Terminal Low Voltage
System Upgrade  GC/CM Preconstruction Services Agreement in the amount of $1,500,000 to
be paid to the GC/CM contractor on a time and material basis for actual costs incurred. The
revised contract amount will be $3,000,000.

Background 
This project replaces the Main Terminal's low-voltage distribution system at SEA, which serves
power to every floor of the main terminal and is at the end of its serviceable lifespan. 
Since the last commission action in July 2018, the project has completed 30% design and will
complete the 75% design by Q3 2021.  Preconstruction services began in August 2019 and will
be completed in Q3 2022. This contracting approach will help minimize and mitigate operational
disruption during construction. The project replaces nearly 300 separate electrical power panels 
and installs a new power center. Other preconstruction services include detailed design reviews
with recommendations to improve quality and reduce project costs. During construction, Work
performed by the GCCM and ECCM will be negotiated directly as part of the maximum allowable
construction costs (MACC). All remaining work will be competitively bid by the GCCM with Port
oversight. As part of their preconstruction services, the GCCM will work with the Port to develop
subcontract bid packages. 
JUSTIFICATION 
SEA's medium voltage electrical distribution system and power centers have all been renewed
and replaced within the last 20 years. The next phase of SEA's renewal and replacement program
for the electrical system is the low-voltage system. This infrastructure is critical to airport
operations. 
Large portions of the existing low-voltage electrical distribution system are over 40 years old and
have reached the end of their useful operating life (30 years), raising concerns over their
continued reliability. Additionally, much of the existing equipment is not compliant with the
current National Electrical Code (NEC). This Main Terminal Low Voltage System Upgrade will
correct all the issues in this area and bring the installation up to current standards and compliance
with current codes. 

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

COMMISSION AGENDA  Action Item No. 8d                                  Page 3 of 6 
Meeting Date: April 27, 2021 

The project team has completed the 30% design which included a full physical inventory and
condition assessment of all electrical equipment in the main terminal and is scheduled to
complete the 75% design in Q3 2021. The major work elements are detailed below. 
Normal Power Work 
The project includes the replacement of nearly 300 of the 600 electrical panels; these panels are
of similar age and condition and are at a similar risk of failure. 
Emergency Power Work 
The project includes the replacement and code corrections for the emergency power distribution
system which is of similar age, condition and risk of failure as the normal building power. 
Central Terminal Power Distribution Load Center 
The Central Terminal Power Center is nearing the end of its useful life and is the only terminal
power center that was not upgraded in circa 2005 and not configured for maximum reliability. 
Energy Metering 
Branch circuit metering will allow the Port of Seattle to identify and implement future energy
saving projects to comply with Washington State Energy Code for 2015 as adopted by Port
Resolution 3745. 
Regulated Materials 
Many of the work locations for this project are in areas where regulated materials are present.
Due to the large geographic areas this project covers, asbestos abatement costs will be significant
and have been estimated at $13,000,000. 
Diversity in Contracting 
Diversity in Contracting is a key component in the selection process for the GC/CM contractor.
As part of the evaluation process, GC/CM proposers were required to provide a detail summary
of their plan to meet the 8% WMBE goal during the construction phase of the project. During
the preconstruction services phase of the GC/CM contract, the Port and Mortenson will develop
subcontract work packages, inclusion and outreach plans to meet this goal during construction.
DETAILS 
Scope of Work 
This project covers the renewal and replacement of end of life low-voltage electrical distribution
switchboards, feeders, panels, and tenant metering in the Main Terminal served by the five Main
Terminal Power Distribution Load Centers. The work will be carried out in a manner that
minimizes disruptions to normal airport operations. 


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

COMMISSION AGENDA  Action Item No. 8d                                  Page 4 of 6 
Meeting Date: April 27, 2021 

Specific Scope Items: 
(1) Normal Power renewal, replacement, optimization, and expansion. 
(2) Emergency Power renewal, replacement, optimization, and expansion. 
(3) Replacement of the Central Terminal Power Distribution Load Center. 
(4) Implement branch circuit level energy metering in new work. 
(5) Minimize disruption to normal airport operations during construction. 
(6) Abatement of regulated materials as incident to the overall scope. 
Schedule 
75% Design Complete                         Q3 2021 
Design Complete                              Q2 2022 
Commission construction authorization          Q2 2022 
(MACC) 
Construction start                                Q3 2022 
Construction complete                         Q4 2025 
FINANCIAL IMPLICATIONS 
There is no additional funding being requested in this memo.  Previously authorized funding
included the full amount of the revised contract value. Full budget authorization for construction
will be requested in Q3 2022. 
Cost Estimate/Authorization Summary)              Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                $19,640,000      $1,090,000     $20,730,000 
Previous changes  net                         $67,120,000     $12,450,000     $79,570,000 
Current change                                        $0              $0              $0 
Revised estimate                              $86,760,000    $13,540,000   $100,300,000 
AUTHORIZATION 
Previous authorizations                         $30,193,000        $540,000     $30,733,000 
Current request for authorization                         $0               $0               $0 
Total authorizations, including this request      $30,193,000        $540,000     $30,733,000 
Remaining amount to be authorized          $56,567,0000    $13,000,000    $69,567,000 



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

COMMISSION AGENDA  Action Item No. 8d                                  Page 5 of 6 
Meeting Date: April 27, 2021 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1 - Do not execute the change order and perform remaining preconstruction services
within current contract value. 
Cost Implications: Reduces available funding by $1,500,000 for preconstruction services. 
Pros: 
(1) Delays or defers Port investment. 
Cons: 
(1) Ability to utilize GC/CM's and EC/CM's knowledge and experience eliminated, especially
regarding more cost-effective design and construction means and methods. 
(2) Port exposed to increased risk and cost during construction for unforeseen conditions and 
unplanned impacts during electrical outages during panel replacement. 
(3) Design cost will increase as field work currently perform by GC/CM and EC/CM in support
of design will now have to be performed by designer. 
(4) Additional workload will be placed on Av/Maintenance to support access to electrical
rooms for design team. Access is currently provided by GC/CM and EC/CM contractors. 
(5) Loss of GC/CM and EC/CM  estimating skills  and experience with current market
conditions reduces Port's ability to effectively manage project costs and budget.
(6) Ability to coordinate construction with other Port projects is reduced. 
This is not the recommended alternative 

Alternative 2    Execute the change order and have the GC/CM and EC/CM perform all
preconstruction services. 
Cost Implications: $1,500,000 
Pros: 
(1) Increased ability to utilize GC/CM's and EC/CM's knowledge and experience to implement
a more cost-effective design. 
(2) Risk to Port from unforeseen conditions and unplanned impacts during electrical outages
significantly reduced. 
(3) Design support efforts performed by GC/CM and EC/CM in support of design reduce
design cost while increasing GC/CM and EC/CM knowledge of the project. 
(4) Significantly reduces need for AV/Maintenance staff to support design efforts allowing
AV/Maintenance to focus on core functions. 
(5) Retains GC/CM and EC/CM  estimating skills and experience with current market
conditions and increases Port's ability to effectively manage project costs and budget. 
(6) Knowledge developed by GC/CM and EC/CM contractors over the past year is retained by
project team. 


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

COMMISSION AGENDA  Action Item No. 8d                                  Page 6 of 6 
Meeting Date: April 27, 2021 
Cons: 
(1) Knowledge developed by GC/CM and EC/CM contractors could be lost if current GC/CM
and EC/CM  staff providing preconstruction  services are able to  stay through the
remaining preconstruction period. 
This is the recommended alternative. 
ATTACHMENTS 
None. 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
July 10, 2018  The Commission authorized an additional $22,586,000 for a revised 
authorized amount of $30,733,000. 1) Increase project scope and budget to $100,300,000; 
2) contract for design services; 3) advertise and execute General Contractor, Construction 
Manager construction contract and pre-construction services; 4) Negotiate and execute 
project labor agreement; 5) utilize Port crews for preconstruction activities and abatement. 
June 12, 2018 - The Commission was briefed on upcoming July 10, 2018 authorize request. 
August 5, 2014 - The Commission approved project consolidation and design. 
June 28, 2007 - The Commission approved design and construction of a project which is 
much more limited scope and budget and is now included in the larger current effort. 








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