PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA             Item No.      6c 
Date of Meeting     July 26, 2011 
DATE:    July 19, 2011 
TO:     Tay Yoshitani, Chief Executive Officer 
FROM:    Michael Ehl, Director, Airport Operations 
Wayne Grotheer, Director, Aviation Capital Improvement Program 
SUBJECT:  Airport Runway 16 Center/34 Center (16C/34C) Surface Panel Replacement. 
(CIP# C800112) 
Amount of This Request: $200,000 previously authorized        Source of Funds: ADF 
Total Estimated Cost: $4,169,262 
ACTION REQUESTED 
Request Port Commission authorization for the Chief Executive Officer to modify the Scope of 
Work for the Runway 16C/34C Surface Panel Replacement project by extending the project
period through the end of 2012, and approval of the use of $200,000 of the previously authorized
funds to prepare design documents for a surface panel replacement construction contract to be
advertised and constructed in 2012. The total cost of this project is $4,169,262. 
SYNOPSIS 
The Airport airfield is a very large area where a variety of design and construction activity must
occur each year. As a result, multiple requests for authorization can reach the Commission each
year. This July 26th Commission meeting includes three separate airfield authorization requests.
The work area for this particular authorization is Runway 16C/34C 
This authorization requests design for additional concrete panel replacements in 2012 on
Runway 16C/34C similar to work performed earlier in 2010. Additional panel replacements are
expected because the now 42-year old runway was originally designed for a 20-year life. No
additional budget is requested because adequate budget was already authorized in 2009. In fact,
budget savings are anticipated even with additional panel replacements. This work extends the
life of the aging runway in anticipation of its overall demolition and reconstruction currently
scheduled for 2016. If panels deteriorate more quickly than anticipated between 2012 and 2016,
then more panel replacements will be necessary which would require a future separate
authorization request. Following design, staff will return in early 2012 to request authorization
for construction.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 19, 2011 
Page 2 of 5 
BACKGROUND
Runway 16C/34C was constructed of concrete in 1969, with a 20-year design life. The Airport
began a Runway Improvement Program in 1993, which was designed to rehabilitate and extend
the useful life of the runway. More than 400 concrete panels have been replaced since the
beginning of the program. This project, a continuation of the overall Runway Improvement
Program, will replace additional concrete panels where the useful life of the surface panels has
been exceeded. 
Typical degradation of the runway is occurring, such as cracking, spalling, and faulting. Cracks
and spalls result in Foreign Object Debris (FOD), which can cause aircraft damage. Faulting
results in a rough ride, but is also indicative of further pavement and subgrade deterioration. 
A previous project replaced failing concrete surface panels on Runway 16C/34C during the 2010
construction season. It was noted in the February 9, 2010 request for authorization that, "If it is
necessary to ensure continued operational safety, staff will return to Commission prior to the
reconstruction in 2016, to request additional panel replacement funds." Since there were savings
from funds previously authorized and a further need for the replacement of surface panels 
evolved, this request is to extend the use of those funds to prepare contract documents for a
construction contract to be advertised and constructed in 2012 for additional surface panel
replacement on runway 16C/34C. The replacement of panels on runway 16C/34C is planned to
be part of a single contract that includes the replacement of panels on non-runway surfaces (i.e.,
taxi-ways, taxi-lanes, ramp areas). 
Funds were previously authorized for the design, advertisement, and execution for a 2010
surface panel replacement on runway 16C/34C in the amount of $5,650,000. Of that amount,
$2,769,262 has been expended and $1,480,738 has been returned as savings leaving an
unexpended and previously authorized amount of $1,400,000. Up to $200,000 of this amount
will be used for design with the remaining $1,200,000 reserved for the 2012 construction
contract. A request for authority to advertise the construction contract will be brought to the
Commission in early 2012. There are currently four panels on runway 16C/34C identified for
replacement and another twelve that are being monitored. Given that pavement distress will
continue to occur between now and 2012, additional panels will likely be added. Staff believes
that even should a significant accelerated deterioration occur, the $1.4 million for the design and
construction should be sufficient to cover the scope of panel replacement and there may be
possible future savings available to return after the project is complete. 
Design would begin in the third quarter 2011 and advertisement would occur no later than the 
spring of 2012 so any pavement distress that will have occurred over the winter is identified and
included in the contract. Runway 16C/34C is scheduled to be replaced in 2016 and therefore
2012 is the last year that the replacement of those distressed panels can be capitalized. 
PROJECT JUSTIFICATION: 
Project Statement: 
Perform Runway 16C/34C panel replacement in 2012, for a cost not to exceed $1,400,000 using
previously authorized funds.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 19, 2011 
Page 3 of 5 
Project Objectives: 
The project objective is to replace damaged concrete panels on Runway 16C/34C. The
rehabilitation will require the runway to be closed with the exact duration of closure dependent
on the number of panels to be replaced. The overall objective is to maintain the runway in an
operational condition until its planned reconstruction in 2016. 
PROJECT SCOPE OF WORK AND SCHEDULE: 
Scope of Work: 
The scope of work includes design to replace deteriorated concrete panels on runway 16C/34C.
Work may also include removal and replacement of in-pavement runway lights and associated
infrastructure; installation and removal of temporary runway and taxiway markings; and
repainting runway and taxiway markings.
Schedule: 
100% Design                  December 2011 
Commission Authorization           January 2012 
Advertise for Bids                  January 2012 
FINANCIAL IMPLICATIONS: 
Budget/Authorization Summary 
The original 2007 budget anticipated a reduced scope to maintain the runway until it could be
reconstructed in 2010. On February 26, 2008, the Commission authorized $450,000 for Runway
16C/34C joint resealing. These expenditures were accounted for as an operating expense in
2008. The remaining budget, for panel replacement, was deferred until 2012 (the runway
reconstruction date at that time was under review). In the fall of 2009, staff inspected the
runway and deemed it prudent to increase the budget to replace panels in 2010, in order to
attempt to extend the full reconstruction until 2016.
Original Budget in 2007                                    $2,415,000 
Budget Additions in 2009                                   $3,235,000 
Total Budget                                           $5,650,000 
Returned Savings in 2011                                   $1,480,738 
Revised Current Budget                                $4,169,262 
Previous Authorizations                                     $5,650,000 
Current Request for Authorizations                                   $0 
Total Authorizations, Including This Request                    $5,650,000 
Remaining Budget to be Authorized                              $0

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 19, 2011 
Page 4 of 5 
Source of Funds 
This project is included in the 2011-15 capital budget and plan of finance within CIP# C800112.
The funding source will be the Airport Development Fund.
Financial Analysis Summary 
The project savings of $1,480,738 will translate into a reduced CPE impact of approximately
$0.02 through 2015.
LIFECYCLE COSTS & SAVINGS: 
Generally, there are no economic impacts related to renewal/enhancement projects since they are
primarily related to preservation of an existing business activity. 
ENVIRONMENT AND SUSTAINABILITY: 
The runway repair and maintenance project is eligible for a Categorical Exclusion and
Categorical Exemption under the National Environmental Policy Act (NEPA) and State
Environmental Policy Act (SEPA) due to the nature of the project. The environmental review for
the project will be completed before the project advertises for bid.
During repair and maintenance activities, various sustainability practices will be considered and
implemented when practicable. These include, but are not limited to: performing a life cycle
analysis of materials used to ensure that resources being used and/or recycled are
environmentally and economically practical; utilizing onsite water for dust control and irrigation;
the reuse of materials such as concrete, asphalt, and soil; and employing low emission
construction equipment. 
The Airport's three runways allow for various landing and departure scenarios that improve air
quality and increase the efficiency of air traffic control. Maintaining Runway 16C/34C is critical
in preserving the three-runway system.
In addition, when runways are not maintained, there are a wide range of serious consequences
that could occur should an aircraft engine ingest FOD from deteriorated runway concrete. 
STRATEGIC OBJECTIVES: 
This project supports the Port's strategy to "Ensure Airport Vitality" by maintaining a safe
operating environment as well as maximizing asset utilization.
TRIPLE BOTTOM LINE SUMMARY: 
This project is a financially responsible way to delay a much larger project (Runway 16C/34C
reconstruction) while continuing to allow the runways to be used in an efficient fashion.
Maintaining an operating runway benefits both our airline customers and travelers.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
July 19, 2011 
Page 5 of 5 
ALTERNATIVES CONSIDERED AND THEIR IMPLICATIONS 
1.  Do nothing. This alternative would result in Runway 16C/34C becoming a potentially unsafe
surface, which would require closure of the Runway. This is not the recommended
alternative. 
2.  Replace all currently identified and emergent failing panels on Runway 16C/34C within the
2012 construction season with separate projects. Since the work would be identical in nature
to a project to replace panels on non-runway surfaces, this approach would be inefficient and
likely result in more operational impact with two projects possibly underway at the same
time by two different contractors. This is not the recommended alternative. 
3.  Replace all currently identified and emergent failing panels on Runway 16C/34C and nonrunway
surfaces within the 2012 construction season with a single construction project. This
approach would be the most efficient means and result in a coordinated effort to replace
surface panels on Runway 16C/34C and non-runway surfaces. This is the recommended
alternative. 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
On June 13, 1993, the Commission authorized $10,422,000 for runway 16R/34L rehabilitation
and other airfield improvements (CIP 100663). 
On November 26, 1996, the Commission authorized $2,000,000 for a multi-year program of
panel replacement on runway 16R/34L (CIP 100663). 
On January 14, 2003, the Commission authorized $5,000,000 for a multi-year program of panel
replacement on runway 16R/34L (CIP 102037). 
(Note: On October 30, 2003, runway 16 Right/34 Left (16R/34L) was renamed runway
16C/34C, in preparation for the Third Runway to assume the runway 16R/34L designation.) 
On February 26, 2008, the Commission authorized $450,000 for joint seal replacement on
runway 16C/34C (CIP 800112). 
On February 9, 2010, the Commission authorized $5,650,000 for the design, advertisement, and
award of a construction contract for the 2010 Airfield Improvement Projects  Contract 1,
consisting of panel replacements on runway 16C/34C.