PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA             Item No.      5c 
Date of Meeting      5/10/2011 

DATE:    April 29, 2011 
TO:     Tay Yoshitani, Chief Executive Officer 
FROM:    Ralph Graves, Managing Director, Capital Development Division 
SUBJECT:  Change Order #02 for the Terminal Escalators Modernization Project at Seattle 
Tacoma International Airport, Contract MC-0316531, CIP C800237 
Amount of This Request:  $462,000        Total Project Cost: $17,407,000 
Source of Funds: Design Build Contract Contingency. No additional funds required 
Est. State and Local Taxes: $1,653,665 of Total Project Cost   Jobs Created: None 

ACTION REQUESTED:
Request authorization for the Chief Executive Officer to issue Change Order Number 02 for
Contract MC-0316531 for the Terminal Escalators Modernization Project at Seattle-Tacoma
International Airport in an amount not to exceed $462,000 to change certain escalator balustrades
from high-deck stainless steel to low-deck glass; to change the escalator cladding from the
existing dark bronze to stainless steel on certain escalator balustrades; to install deceleration
"sleep mode" sensors in escalator newel ends; and to change the step lighting from balustrade to
skirt panel for 34 replacement escalators. The total project cost is $17,407,000. No additional
project funds are being requested for this change order; funds are available from the contract
construction contingency. 

SYNOPSIS:
This project provides for the replacement of forty-two (42) escalators in the Main Terminal,
Concourse B, and the South Satellite and installation of two new escalators in the South Satellite.
These escalators are critical infrastructure essential to the operation of Seattle-Tacoma
International Airport (Airport) and have reached the end of their useful service life.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
April 29, 2011 
Page 2 of 5 
This change order provides for changes to the escalators to upgrade the appearance of the
escalators in the Main Terminal consistent with previous terminal projects, and provide sensors
in the escalators to activate an energy-saving feature that decelerates the units when not in use.
The change order will be issued for a not-to-exceed amount of $462,000 and costs will be
reconciled in a future change order after the Port has completed evaluation and negotiation with
the contractor. 
The source of funds for this change order would come from the contract construction
contingency, requiring no additional funds. The project schedule remains unchanged. 
BACKGROUND:
This project has utilized the Design-Build contracting method. Turner Construction Company
(Turner) was the selected firm with contract execution on February 9, 2011. The contract
amount is $16,945,000 with a contract completion date of May 2013.
The project is now proceeding through the final design phases, which are being performed by
Turner. The Port has identified several changes to the escalator units that will provide features
considered beneficial to the Airport. As part of an effort to continue the more contemporary,
brighter appearance and design character of the past decade's South and Central Terminal
Expansion projects, project changes will include glass escalator balustrades (sides) and stainless
steel cladding under the escalators for 22 of the Main Terminal escalators. The glass balustrades
had previously been considered during the procurement process last fall. However, the more
recent Airport initiative to upgrade the appearance of the Main Terminal was not under
consideration at that time, and the Port then elected to retain the more durable stainless steel
balustrades. To address the durability aspect of the balustrades, this change order includes a
more impact-resistent laminated glass versus the standard tempered glass balustrade. 
Sensors are also being added in the end panels for all 44 escalators to activate in the near future
pending anticipated State of Washington (WAC) Escalator code revisions an automatic
deceleration "sleep mode" feature that provides significant energy savings when the units are not
in use. The original units include the software necessary for the sleep mode feature in
anticipation of the future regulation change. Recent discussions with the regulatory agency
indicate a more favorable time frame for activation than previously known. Installing the
sensors at this time allows for an earlier activation of the sleep mode feature and is more cost
effective since the work will be done during the manufacturing process versus a more costly field
installation. 
CHANGE ORDER DESCRIPTION: 
The following information relates to the pending change order scope and cost: 
Change Order No. 02 
Scope of work: REVISE the escalator units as follows: 
1.  Change escalator balustrades from high-deck stainless steel to low-deck glass 
in the Main Terminal for the 16 sky bridge units and six (6) North and South

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
April 29, 2011 
Page 3 of 5 
Main Terminal Train Station units including the relocation of the adjacent
stairway railings, estimated at $360,000; 
2.  Change escalator cladding from the existing dark bronze to stainless steel for
16 sky bridge units and six (6) Main Terminal Train Station units, estimated at
$77,000 credit; 
3.  Installation of deceleration "sleep mode" sensors in escalator newel ends (44
escalators), estimated at $196,000; and 
4.  Change step lighting from balustrade to skirt panel for 34 replacement
escalators, estimated at $17,000 credit. 
The contractor shall proceed for a total amount NOT TO EXCEED $462,000. Costs will be
reconciled in a future change order after the Port completes the proposal evaluation and
negotiation with the contractor. 
JUSTIFICATION: 
The contract provides for escalators with high-deck stainless steel balustrades and dark bronze
cladding encasing the bottom of the escalator, comparable to the existing escalators. The 22
escalators affected by this change are in the Main Terminal, serving the baggage claim, sky
bridge and ticketing levels, and from the Main Terminal North & South Train Stations to the
baggage claim level. Replacing the existing opaque, stainless steel balustrades and dark bronze
cladding with new glass balustrades and stainless steel cladding will contribute toward a more
contemporary appearance that continues the ambience and design character of the South and
Central Terminal Expansion projects into the older parts of the terminal. Further, the
transparency of the glass, and reflectivity of both glass and stainless steel will create a brighter,
more open space throughout the escalator well, from the ticket lobby through the bridge level
and baggage claim lobby. 
The cost associated with the glass balustrade is a result of upgrading the typical tempered glass
to a stronger, shatter-proof laminated glass. Further, the railings for the adjacent stairways will
need to be independently supported rather than the existing method of being secured to the
stainless steel balustrades. The credit for the stainless steel cladding is a result of the
replacement of the existing dark bronze cladding, which is more expensive and harder to obtain
than the readily available stainless steel material. 
The current project scope includes the installation of the internal electronic controls/software to
allow automatic deceleration and acceleration of the speed of the escalators based on passenger
use. This "sleep mode" feature provides for substantial energy savings (up to 50 percent)
depending on passenger frequency as well as reduces repair/maintenance costs. Current safety
code does not allow for operation of the sleep mode feature at this time, although the code is
expected to change as early as 2012 if not earlier through provision of a variance. The proposed
change is to provide for the installation and field testing of the external sensors in each unit to
activate the sleep mode feature.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
April 29, 2011 
Page 4 of 5 
The original project scope has the escalator step lighting located in the stainless steel balustrades.
The change to a glass balustrade requires the relocation of the step lighting to the lower escalator
skirt panels. The level of illumination is unchanged. 
Not proceeding with the change to glass balustrades and stainless steel cladding would negate the
opportunity to achieve the benefits of upgrading the appearance of the Main Terminal as well as
continuing the design character of the South and Central Terminal. Installing the sleep mode
sensors at a later date after the new escalators are installed would approximately double the cost
due to the need to undertake the installations in the field versus the factory. The current schedule
for manufacturing of the escalators requires the Port to direct these changes now regarding the
balustrades, step lighting, and sensors in order to maintain the contractor's schedule for delivery
of the first escalator units in July 2011.
FINANCIAL ANALYSIS: 
The funds to pay for this change order are part of the $1,694,500 construction contract
contingency. No additional project funds are being requested as a result of this change order.
CONTRACT INFORMATION: 
The following information relates to the contract and competitive award: 
Contract award date:                           February 9, 2011 
Original period of performance:     February 9, 2011, through May 15, 2013 
Previous contract extensions:                             0 Days 
Contract extension this change order:                        0 Days 
Current Contract Completion Date:                   May 15, 2013 
FINANCIAL INFORMATION: 
Original contract amount:                          $16,945,000 
Previous Change Orders Executed:                          $0 
Current contract amount                           $16,945,000 
This request, Change Order No. 02                      $462,000 
Subtotal Construction Costs                         $17,407,000 
Anticipated WSST @ 9.5%                       $1,653,700 
Revised Contract Amount                         $19,060,700

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
April 29, 2011 
Page 5 of 5 
PREVIOUS COMMISSION ACTION: 
February 1, 2011, the Commission authorized execution of a contract with the selected Design-
Build team and to construct the Terminal Escalators Modernization Project at a total estimated
cost of $55,000,000. 
June 22, 2010, the Commission authorized the issuance of a Request for Proposals under the
Design-Build contracting procedure. 
May 4, 2010, the Commission tabled a request to issue an RFP pending further information
concerning the need for revenue bond financing for this project. 
April 13, 2010, the Commission authorized the advertisement of the RFQ under the Design-
Build contracting procedure, and the application of a PLA. The project scope was changed to
include a second new escalator in the South Satellite. 
July 22, 2008, the Commission authorized $3,183,000 to prepare the performance specifications
and preliminary design for the Renew/Replace 42 Escalators and 1 New Escalator project at
Seattle-Tacoma International Airport. 
OTHER DOCUMENTS ASSOCIATED WITH THIS REQUEST: 
None.