COMMISSION 
AGENDA MEMORANDUM                Item No.       6c 
ACTION ITEM                   Date of Meeting    January 30, 2018 
DATE:    January 17, 2018 
TO:     Dave Soike, Interim Executive Director 
FROM:   Ralph Graves, Senior Director Capital Development 
SUBJECT:  Alternate Utility Facility  Utility Services Update (CIP #C800538) 

ACTION REQUESTED 
Request Commission authorization for the Executive Director to amend and increase the Notto-Exceed
amount of the Puget Sound Energy (PSE) Engineering Services and Construction
Agreement (ESCA) required for the Alternative Utility Facility (AUF) from $850,000 to
$1,500,000. No additional funding is associated with this request. 
SUMMARY 
This action is proposed with an abbreviated one-page memo in response to Commission bylaws 
discussions on December 12, 2017. At that time, commissioners suggested a trial effort to use a
shortened memo for action on the unanimous consent calendar to reduce staff time for action
items less than $1 million that the Executive Director considers routine.
To support the AUF project PSE has determined both power feeds to the Port's South Sea-Tac
substation must be de-energized simultaneously which requires additional funding for this
work. The funding associated with this agreement is within the current authorized project
budget. There is no new funding associated with this request. 
The Port and PSE had previously planned to keep one of the two feeds energized and
operational at all times.  In order to de-energize both feeders, keep Sea-Tac Substation
operational and perform the work in a safe manner, a portable temporary substation must be
installed. The cost for this new work is estimated at $400,000 with an additional $250,000
contingency. The contingency will allow Port staff to further modify the PSE scope of work
within the approved budget without additional Commission authorization. The temporary
substation will be utilized for a period of six to eight weeks. 
The AUF project will provide an enclosed, dual fuel, standby power facility that is functionally
complete, fully integrated, and capable of supplying 30 megawatts (MW) of power to the
airport and supporting facilities. Upon the unexpected loss of normal utility power, the AUF will
provide stable power to the Airport for up to 24 hours without replenishment of fuel. 
There are no attachments to this memo. 

Template revised September 22, 2016.