4d. Memo

COMMISSION 
AGENDA MEMORANDUM                        Item No.          4d 
ACTION ITEM                            Date of Meeting     February 28, 2017 
DATE:     February 17, 2017 
TO:        Dave Soike, Interim Chief Executive Officer 
FROM:    Jeffrey Brown, Director Aviation Facilities and Capital Programs 
Wayne Grotheer, Director, Aviation Project Management Group 
SUBJECT:  Passenger Loading Bridge Renewal/Replacement (CIP #C800793) 
Amount of this request:               $2,200,000 
Total estimated project cost:         $10,000,000 
ACTION REQUESTED 
Request a single Commission authorization for the Chief Executive Officer to (1) proceed with
design for the replacement of the passenger loading bridge (PLB) at Gate B10 and the PLB and
fixed walkway at Gate S11; (2) purchase two new PLBs and a fixed walkway; (3) use Port crews 
and small works contracts. The amount of this request is $2,200,000. 
EXECUTIVE SUMMARY 
Reliable, well operating passenger loading bridges are critical to airline and airport operations.
Port staff has created a prioritized list of PLBs whose age and condition indicate a need for
replacement or refurbishment. Nine PLB's (and associated fixed walkways) considered to be at
highest risk for failure are scheduled for replacement or under this project: Gates B10, C9, C11,
C14, C15, C16, C18, D11, & S11. 
To minimize impacts to airlines and airport operations, these nine PLB's will be replaced over
the next four years. Staff will request future Commission authorization for the next phases of
this work scheduled for 2018 through 2020. These PLB's are part of the extended-year sourcing
that is one of the procurement excellence initiatives. 
JUSTIFICATION 
The PLB's at Sea-Tac have high utilization compared to airports with comparable annual
enplanements.  In 2015, Sea-Tac processed approximately 217,000 passengers per gate, the
highest of all peer airports and well above the national average of approximately 153,000. Any
unplanned downtime due to PLB or fixed walkway failure impacts airlines and customer service.
PLBs have a service life of approximately 25 years before major refurbishment or replacement
is required. Many of the parts for 25+ year old PLB's are no longer available, as a result, repair
time is extended while parts are fabricated, remanufactured or used parts are located from

Template revised September 22, 2016.

COMMISSION AGENDA  Action Item No. 4d                                  Page 2 of 5 
Meeting Date: February 28, 2017 
other PLB's owners. Unplanned downtime caused by failure of obsolete parts can extend for
several weeks, seriously disrupting airline operations. 
DETAILS 
AVPMG has worked in conjunction with AV Operations, AV Planning, AV Facilities and
Infrastructure and AV Maintenance to create a prioritized list of Passenger Loading Bridges
(PLBs) whose age and condition are cause for replacement or refurbishment.
PLB's at B10, C9, C15, D11, & S11 are 30+ years old. 
Scheduled for replacement in 2017 (this authorization) 
1.  S11 Bridge and Walkway -- 1983 (A3 60/119) 
2.  B10 Bridge -- 1987 (A3 58/110) 
Scheduled for replacement in 2018 (future authorization) 
1.  C15 Bridge -- 1970's (A3 60/119) 
2.  C9 Bridge -- 1980's (A3 44/78) 
3.  D11 Bridge -- 1984 (?) 
PLBs at C11, C14, C16, & C18 are 25+ years old. 
Scheduled for replacement in 2019 (future authorization) 
1.  C11 Bridge  1992 (A2 57/84) 
2.  C14 Bridge  1990 (AD2 61/91 185L) 
Scheduled for replacement in 2020 (future authorization) 
1.  C16 Bridge  1992 (A2 59/78) 
2.  C18 Bridge _ 1992 (A3 58/110 125R) 
Replacement of the PLBs is preferred as it will take the gates out of service for only 2 weeks
while a complete refurbishment could leave the gate inoperative for 6-12 weeks. 
Scope of Work 
1)  Design services for this scope of work will be provided under existing indefinite delivery,
indefinite quantity (IDIQ) design services contracts. 
2)  Purchase  and  installation  of  new  PLBs,  associated  fixed  walkway  and  related
components at Gates B10 and S11 along with necessary architectural, electrical, data
and mechanical infrastructure upgrades to meet new PLB standards and current code
requirements.
3)  Port Construction Services (PCS) will perform work associated with preparing the
foundations upgrade or replacement and provide construction management services for
the PLB installations at both gates.

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

COMMISSION AGENDA  Action Item No. 4d                                  Page 3 of 5 
Meeting Date: February 28, 2017 
4)  The new bridges will be connected to the Port's facility monitoring system so any
malfunction that shuts the bridge down will be promptly reported to Maintenance for 
faster response. 
Schedule 
Installation of B10 and S11 is scheduled for the fall of 2017. 
Activity 
Design start                                       2017 Quarter 1 
Construction start                                2017 Quarter 3 
In-use date                                       2017 Quarter 4 
Per the terms of the airline signatory lease and operating agreement (SLOA), the airlines will
have an opportunity to object to this project through a majority-in-interest (MII) vote. The MII
ballot will be submitted to the airlines in early March. 
Cost Breakdown                                     This Request           Total Project 
Design                                                    $400,000             $1,500,000 
Construction                                              1,900,000             $8,500,000 
Total                                                         $2,300,000             $10,000,000 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1  Refurbish the gates in place. 
Cost Implications: Total project for nine PLBs $7,500,000 ($1,670,000 for PLBs at B10 & S11) 
Pros: 
(1)   Lowest first cost 
Cons: 
(1)   Increased downtime and impact to airport operations (6-12 week downtime) 
(2)   Reduced PLB service life (15 year service life) 
(3)   Highest total cost of ownership 
(4)   Does not provide for new PLB models to adjust for evolving airline fleet mix 
This is not the recommended alternative 



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

COMMISSION AGENDA  Action Item No. 4d                                  Page 4 of 5 
Meeting Date: February 28, 2017 
Alternative 2  Replace the existing PLB's with new equipment. 
Cost Implications: Total project for nine PLBs $ 10,000,000 ($2,300,000 for PLBs at B10 & S11) 
Pros: 
(1) Minimizes gate downtime and impact to airport operations (2-3 week downtime) 
(2) Greatest PLB service life (25 years) 
(3) Lowest total cost of ownership 
(4) Allows for adjustment to PLB models to account for evolving fleet mix. 
Cons: 
(1) Highest first cost 
This is the recommended alternative. 
FINANCIAL IMPLICATIONS 
Cost Estimate/Authorization Summary              Capital        Expense           Total 
COST ESTIMATE 
Original estimate                                $10,000,000               $0     $10,000,000 
AUTHORIZATION 
Previous authorizations (preliminary funds)        $100,000                0        $100,000 
Current request for authorization                $2,200,000                0      $2,200,000 
Total authorizations, including this request       $2,300,000                0      $2,300,000 
Remaining amount to be authorized            $7,700,000             $0     $7,700,000 
Annual Budget Status and Source of Funds 
The Passenger Loading Bridges Project CIP#C800793 is included in the 2017-2021 capital budget
and plan of finance with a budget of $10,000,000. The funding sources will include the Airport
Development Fund and future revenue bonds. 
Financial Analysis and Summary 
Project cost for analysis              $10,000,000 
Business Unit (BU)                  Passenger Loading Bridges 
Effect on business performance     NOI after depreciation will increase 
(NOI after depreciation) 
IRR/NPV (if relevant)                N/A 
CPE Impact                       $.04 in 2021 


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

COMMISSION AGENDA  Action Item No. 4d                                  Page 5 of 5 
Meeting Date: February 28, 2017 

ATTACHMENTS TO THIS REQUEST 
None 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
None 















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

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