COMMISSION 
AGENDA MEMORANDUM                        Item No.          6d 
ACTION ITEM                            Date of Meeting       April 14, 2020 
DATE:     April 3, 2020 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Eileen Francisco, Interim Director Aviation Facilities and Capital Programs 
Wayne Grotheer, Director, Aviation Project Management 
SUBJECT:  Puget Sound Energy Engineering Services and Construction Agreement - Electric
Utility Switching Project (CIP #C800699) 
ACTION 
Request Commission authorization for the Executive Director to execute an Engineering
Services and Construction Agreement (ESCA) between Puget Sound Energy (PSE) and the Port
of Seattle (Port) for services to be performed by PSE on the Electric Utility Switching Project at
Seattle-Tacoma International Airport (Sea-Tac). Amount to be paid to PSE by the Port estimated 
not exceed $1,014,000.

SUMMARY 
This Electric Utility Switching project will install an industrial computer system to allow for the
safe operation, monitoring, and control of the electrical power distribution system at Sea-Tac
Airport. This Electric Utility Switching system will be installed throughout Sea-Tac Airport
providing a complete, fault-tolerant control and data acquisition system. The Electric Utility
Switching system will serve 26 medium-voltage supply power distribution centers (12,470V 
480V) and two utility substations (12,470V) and will enable compliance with current electrical
safety regulations. 
During design review with the local power utility it was determined that substantial work on the
Bow Lake Substation (owned and operated by Puget Sound Energy), which provides high
voltage power to Sea-Tac airport, was required.  This agreement would allow PSE to execute
work that includes indication of Port of Seattle breaker positions at PSE dispatch, reverse power
relaying to prevent back feeding into the utility grid, and other construction activities necessary
for the successful implementation of Electric Utility Switching Project integration with the
Alternate Utility Facility (AUF) facility.
To support the Electric Utility Switching Project, we request this ESCA with Puget Sound Energy 
be approved.  The funding associated with this agreement is within the current authorized
project budget. There is no new funding associated with this request. 

Template revised September 22, 2016.

COMMISSION AGENDA  Action Item No. __6d__                              Page 2 of 2 
Meeting Date: April 14, 2020 
Previous Commission Actions 
1.  On July 9, 2019, Commission approved an increase in authorized project funds to
$11,950,000, the total estimated cost of the project. This also included approval to
advertise and award a major works construction contract at Seattle  Tacoma
International Airport. 
2.  On July 27, 2015, Commission approved the Chief Executive Officer to execute a design
contract and prepare design and construction bid documents. The total value of this
request was $1,560,000 of an estimated total project cost of $9,650,000. 















Template revised September 22, 2016; format updates October 19, 2016.