COMMISSION 
AGENDA MEMORANDUM                        Item No.          6g 
ACTION ITEM                            Date of Meeting     December 10, 2019 
DATE:     December 3, 2019 
TO:        Stephen P. Metruck, Executive Director 
FROM:    Jeffrey Brown, Director, Aviation Facilities and Capital Programs 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  Emergency Generator Controls Project (CIP C800784) (Short Form) 
Amount of this request:                 $200,000 
Total estimated project cost:           $2,500,000 
ACTION REQUESTED 
Request Commission authorization for the Executive Director to increase project authorization
by $200,000 to support design and construction for the Emergency Generator Controls Upgrade
project at Seattle-Tacoma International Airport. Total project authorization is $1,000,000, for a
total estimated project cost of $2,500,000. 
SUMMARY 
This project will provide for the renewal and replacement of the existing control system and
thereby extend the useful life of the generators that provide emergency electrical power to
Concourses B, C, D, the Central Terminal, and the North and South Satellites. Emergency power
is legally required for egress lighting within the terminal buildings and at other locations where
interruption of power could produce life safety hazards. While the diesel engine generators are
in good working condition, the manufacturer has discontinued support for the microprocessorbased
control system  and no longer provides technical support or replacement parts. 
Additionally, this project will install a load bank necessary for system compliance testing in a
way that will not disturb normal power distribution or interrupt airport operations.
The Airport Building Department has determined that all emergency power systems within the
generator and control rooms must be brought up to current building codes when the new
control system is installed. This authorization will be utilized to perform an assessment of these 
locations and determine associated costs to bring the facilities up to current mechanical,
electrical, fire, and building codes. This assessment will include full analysis of existing systems,
not included in the original scope, but required by the authority having jurisdiction.  Staff
currently estimates an additional $1,800,000, for a total estimated project cost of $4,300,000,
will be necessary to complete this project. After the assessment has been completed, staff will
return to Commission for authorization as required.

Template revised April 12, 2018.

COMMISSION AGENDA  Action Item No. __6g__                              Page 2 of 2 
Meeting Date: December 10, 2020 
There are no attachments to this memo. 


















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