Item 6e Memo

PORT OF SEATTLE 
MEMORANDUM 

COMMISSION AGENDA             Item No.      6e 
Date of Meeting     June 2, 2009 
DATE:    May 14, 2009 
TO:     Tay Yoshitani, Chief Executive Officer 
FROM:    Michael Ehl, Director Airport Operations 
George England, Program Leader, Aviation Project Management Group 
SUBJECT:  Advertise for construction bids, award the contract, and construct the 4th floor
walkway within the terminal parking garage to provide access to the Sound
Transit Airport Station. 
ACTION REQUESTED: 
Request authorization for the Chief Executive Officer to advertise for bids, execute, and award
construction contracts and pre-purchase of materials and equipment; allow Port Construction
Services to advertise for Small Works construction contracts; and amend, execute, and award
outside professional services agreements for engineering and construction management; for the
4th floor walkway within the terminal parking garage as part of the 4th Floor Improvements
Project for an additional $2,014,000 bringing the total project authorization to $8,991,000. 
SYNOPSIS: 
The Port is committed to constructing a walkway as part of a pedestrian connection through the
4th floor of the parking garage for light rail passengers to travel between the Terminal and Link
Light Rail Station by the end of December prior to Light Rail operations to the Airport. 
PROJECT DESCRIPTION AND JUSTIFICATION: 
The 4th floor walkway is part of the 4th Floor Improvements Project in the garage to construct a
dedicated, safe, and aesthetically pleasing pedestrian connection between the Terminal and the
Airport Link Light Rail Station. This project is a required element of the Port's commitment
under the terms of the Memorandum of Agreement with Sound Transit to ensure that light rail
operations begin to the Airport by the end of 2009. 
Previously the Port Commission authorized $6,977,000 for the 4th Floor Improvements projects,
which included $6,611,000 for the pedestrian bridge from the Sound Transit Station to the garage
and $366,000 for 100% design of the walkway with in the garage. Now that the walkway has

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
May 14, 2009 
Page 2 of 6 

been scoped and designed, it is necessary to increase the authorization to include bidding and
construction of the walkway. 
Project Statement 
Provide a pedestrian connection between Sound Transit's Airport Link Light Rail Station and the
Airport Terminal to coincide with the beginning of light rail operations by end of December
2009 for $2,380,000. 
Project Objectives: 
Create a dedicated, safe, and aesthetically pleasing corridor through the parking garage for
passengers traveling between the Terminal and the Airport Link Light Rail Station. 
Provide facilities and supporting infrastructure that are compatible with future Airport
development and light rail transit implementation. 
Minimize impacts to Airport operations during construction. 
Minimize the Port's capital investment and operational and maintenance costs. 
Minimize the impacts to other Port and Sound Transit capital improvement projects. 
PROJECT SCOPE OF WORK AND SCHEDULE: 
Scope of Work: 
The project consists of constructing a raised walkway, panelized barriers separating vehicles
from passengers, lighting improvements, wayfinding and signage and safety and security
components. The walkway is approximately 560 feet of the 1200-foot pathway between the
Airport Terminal and the Sound Transit Airport Station and is comparable to walking distances
in the Airport from the end of the concourse to the Main Terminal. 
The majority of the walkway scope will be bid and constructed as a major capital project. The
panelized barrier material will be pre-purchased by the Port due to long lead times to order and
receive the materials. Port Construction Services (PCS) will perform specialized portions of the
construction as a small works project in order to meet the project deadline. 
The Port previously evaluated options for a mechanized people mover as part of the pedestrian
connection but decided against including it as part of the current 4th floor walkway project. The
key factors in this decision were: 1) structural and height issues and costs for the mechanized
people-mover option, 2) the impact of the future planned expansion of the garage on the

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
May 14, 2009 
Page 3 of 6 

pedestrian connection improvements, and 3) comparable walking distances in the Terminal that
do not have mechanized people-movers. 
Schedule: 
Design completion: June 18, 2009
Bid and award: June 19 to July 31, 2009 
Construction and commissioning: August 3 to end of December 2009 
Punch list and Closeout: February 28, 2010 
STRATEGIC OBJECTIVES: 
This project supports the Port's strategy to "Be a Catalyst for Regional Transportation
Solutions." 
FINANCIAL ANALYSIS: 
Capital Budget/Authorization Summary: 
Bridge      Walkway    Total Project 
Original Budget                        $2,743,000    $1,657,000    $4,400,000 
Previous Budget Adjustments               $1,597,000   ($1,597,000)         $0 
Budget Increase                        $2,271,000    $2,320,000    $4,591,000 
Revised Budget                       $6,611,000    $2,380,000    $8,991,000 
Previous authorizations                    $6,611,000     $366,000    $6,977,000 
Current Request for Authorization             $ 0    $2,014,000    $2,014,000 
Total Authorization, including this Request       $6,611,000    $2,380,000    $8,991,000 
Remaining Budget to be Authorized                $0         $0         $0

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
May 14, 2009 
Page 4 of 6 

Project Cost Breakdown 
Current Request   All Requests 
Walkway  Total Project 
Construction costs                                  $1,508,000    $4,347,000 
Sales tax                                            $143,000     $187,000 
Outside professional services                            $318,000    $1,497,000 
Other                                             $45,000     $946,000 
Total                                            $2,014,000    $8,991,000 
Source of Funds 
The 4th Floor Improvement project (#C800036) was included in the 2009-2013 Capital
Improvement Program and plan of finance as a committed project with a budget of $8,991,000
and is planned to be funded by the Airport Development Fund or existing Aviation revenue
bonds. 
Financial Analysis 
CIP Category:              Regional Transportation 
Project Type:               Airport Access 
Risk adjusted Discount Rate:     Not relevant to decision 
Key Risk Factors:            Not relevant to decision 
Project Cost (for analysis):       $8,991,000 
Business Unit:              Operations, Landside - Ground Transportation 
Effect on Business Performance:   Ground Transportation is typically a cost recovery business
unit; however, these costs will not be recovered through per
trip fees. The depreciation costs will result in a negative NOI
of approximately $650,000 beginning in 2010. 
IRR/NPV:              Not relevant to the decision 
CPE Impact:              None 
The estimated duration that the pedestrian bridge and walkway will be in operation is greater
than eight years. Even though they are considered interim facilities, the above analysis assumed
the full asset life since expansion of the Main Garage is not currently a committed project. In
addition, there are multiple other options to provide additional parking in the future without
garage expansion.

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
May 14, 2009 
Page 5 of 6 

SUSTAINABILITY AND LIFE CYCLE COSTS: 
The design of the pedestrian bridge and the pedestrian walkway include sustainability as part of
the design development process with a goal to minimize the total cost of ownership for the
project. 
The Port and Sound Transit are jointly developing an Operations Memorandum of Agreement
(MOA) that will accurately estimate the O&M costs including daily janitorial services, utilities
and supplies and assign responsibility between both agencies for the walkway, pedestrian bridge
and other light rail associated facilities. Port O&M costs will be included when this MOA is
authorized and within the 2010 Operating Budget. 
ALTERNATIVES CONSIDERED AND THEIR IMPLICATIONS: 
Do-Nothing  Under this alternative, the Port does not undertake any improvements to provide a
walkway as part of a pedestrian connection between the Airport Link Light Rail Station and the
Airport Terminal. This would create a situation where Sound Transit riders would have to walk
through the active vehicle traffic areas of the parking garage. The result would be a poor level of
customer service and a less safe pathway for riders. The Port would not meet its commitment to
provide this connection as outlined in the Commissions agreement with Sound Transit and the
Airport Link Light Rail Station project would not function as planned. This is not the
recommended alternative. 
Implement a walkway with a mechanized people mover  Under this alternative, the pedestrian
walkway would be constructed along the exterior of the north face of the Main Garage and
would include a mechanized people mover. This alternative more than doubles the estimated cost
of the project and future operating costs. Secondarily, this alternative would conflict with any
potential future planned expansion of the Main Garage. An analysis of the ridership forecasts and
walking distance indicates that a mechanized people-mover is not justified at this time. The
distance between the Station and the Terminal will be similar to walking distances within the
Terminal. This is not the recommended alternative. 
Implement a walkway  Under this alternative a walkway would be constructed along the
interior north face of the 4th floor of the Main Garage. This would result in a direct pedestrian
connection between the Airport Terminal and the Airport Link Light Rail Station and would
satisfy the Port's commitment to Sound Transit. This alternative minimizes the investment in the
pedestrian connection and allows an estimated 8-10 years or more of use prior to any potential
changes that may affect the pedestrian walkway and bridge locations. This is the recommended
alternative.

COMMISSION AGENDA 
T. Yoshitani, Chief Executive Officer 
May 14, 2009 
Page 6 of 6 

TRIPLE BOTTOM LINE: 
The completion of the Airport Link Light Rail Station project will continue to support the
positive long-term economic impacts of the Airport, and provide a community benefit through
the addition of high capacity transit to the Airport. 
BACKGROUND: 
On December 20, 2004, the Port entered into an agreement with Sound Transit to extend the light
rail transit system to the Airport by 2009. This committed the Port to complete several major
capital projects and Sound Transit to complete the Airport Link Light Rail Station project. The
agreement specified that the Port was responsible for the cost of the pedestrian connections from
the Station to the Airport Terminal. 
In order to meet the December 2009 deadline for light rail to become operational to the Airport,
Sound Transit and the Port developed an integrated schedule and contract packaging strategy in
2005 and have been working together since then. On April 11, 2006, the Port entered into an
Interlocal Agreement with Sound Transit documenting this integrated approach and a number of
real property, financial, and construction arrangements. Both parties agreed the Port would
design and construct the pedestrian walkway under a separate construction contract. 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS: 
Previous Commission funding actions on CIP 800036 4th Floor Improvements Project include: 
On February 14, 2006, the Commission authorized $800,000 for the design of the pedestrian 
connection and the construction of the foundations for the pedestrian bridge between the Station
and the Main Garage. 
On April 11, 2006, the Commission passed Resolution 3559, which authorized the Chief
Executive Officer to execute an Interlocal Agreement with Sound Transit to establish the real
property, financial and construction arrangements for the construction of the Airport Link
Project. 
On August 22, 2006, the Commission authorized an additional $3,600,000 for a total of
$4,400,000 for the design and construction of the pedestrian bridge between the Station and the
Main Garage. 
On September 23, 2008, the Commission authorized: transfer of $4,591,000 Non-aeronautical
budget, $366,000 to complete 100% design of the 4th floor walkway and $2,271,000 to advertise,
open, and evaluate bids for the pedestrian bridge as part of the 4th Floor Improvements Project
bring the total authorization to $6,977,000.

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