COMMISSION 
AGENDA MEMORANDUM                        Item No.          8f 
ACTION ITEM                            Date of Meeting        July 9, 2024 
DATE:     June 28, 2024 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Keri Stephens, Director Aviation Facilities and Capital Programs 
Eileen Francisco, Director Aviation Project Management 
SUBJECT:  STS Controls Project Amendment Authorization (CIP #801043) (Short Form) 
Amount of this request:                       $0 
Total estimated project cost:         $78,240,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to execute related project change
orders,  amendments, work  authorizations,  purchases,  contracts,  and take other  actions
necessary to support the delivery of the Satellite Transit System (STS) Controls Renewal and
Upgrade project (CIP #801043) at the Seattle-Tacoma International Airport (SEA). No funding is
associated with this request with the total project authorization remaining at $78,240,000.
SUMMARY 
The STS Controls Project is in the process of replacing critical airport infrastructure to keep the
airport train system operational for the next 10 years. The STS transports passengers to and from
the Airport’s North and South Satellites. This project is a renewal and replacement of the STS’s
Automated Train Control (ATC) system. The current ATC system is 24 years old and is at the end
of its useful life. This project installs STS network infrastructure, replaces end of life ATC systems
equipment, and updates the ATC with the most current version of the manufacturer’s controls
software while maintaining passenger service to the Satellites. 
The project experienced a delay when a key contractor installing the network infrastructure
became insolvent and a construction contract surety was exercised. This request allows the Port
to execute amendments to: (1) extend the project specific professional services design contract
with Lea and Elliott to provide design support through the remainder of construction; and (2)
clarifies the administration of the yearly economic adjustment clause in the Alstom contract. 
These amendments will be paid for through project savings and contingency.  While this
authorization is not requesting budget, the staff does anticipate the need to return to
Commission once the full impacts of the project delays are realized. 
There are no attachments to this memo. 

Template revised April 12, 2018.