PORT OF SEATTLE
MEMORANDUM 

COMMISSION AGENDA             Item No.      6d 
Date of Meeting  January 12, 2010 
DATE:    December 28, 2009 
TO:      Tay Yoshitani, Chief Executive Officer 
FROM:    Michael Ehl, Director, Airport Operations 
Wayne Grotheer, Director, Aviation Capital Improvement Program 
SUBJECT:  Request to advertise for construction bids for the 2010 Airfield Improvement
Projects  Contract 2 at Seattle-Tacoma International Airport (STIA) CIP 100172. 
REQUEST:  Request authority for the Chief Executive Officer to advertise and award a
construction contract for the 2010 Airfield Improvement Projects  Contract 2,
consisting of Third Runway Environmental Mitigation including Miller Creek
Relocation Revisions and Restoration, 160th Street Bridge/Culvert Removal; and
Third Runway Permanent Stormwater Detention Facility at (STIA). 
AMOUNT OF REQUEST: $0     SOURCE OF FUNDS: Passenger Facility Charges
(PFCs) and existing bond proceeds. 
SYNOPSIS: 
This authorization will allow construction bids to be obtained for the scope of work under the
overall Third Runway Project. Although the runway is operational, certain projects nearby the
runway must be accomplished as required by permits and before the overall project can be
completed and closed out. No additional budget is being requested. Sufficient budget for this
work within the runway project has already been authorized by the Commission. This project
will not increase the Airport's forecasted cost per enplanement. The value of the project is
estimated to be $6,625,000. 
PROJECT DESCRIPTION/SCOPE OF WORK 
Project Statement:
Remove the 160th Street Box Culvert as compensation for the inability of the Miller Creek
Relocation Channel to meet a minimum velocity requirement, add gravel to the relocated channel
to improve stream flow characteristics and water quality, and complete the conversion of
construction stormwater ponds to permanent stormwater detention facilities as required by the
permit conditions associated with the Third Runway.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
December 28, 2009 
Page 2 of 5 

Project Objectives: 
Meet the permit conditions required and complete compensatory mitigation associated with the
Miller Creek Relocation for the Third Runway. 
Scope of Work: 
This authorization is for the advertisement and award of the following scopes of work that are 
generally indicated on the map labeled Attachment A: 
Removal of the concrete box culvert and the 160th Street bridge 
Restoration of the Miller Creek channel in the culvert/bridge removal area 
Enhancement of the relocated section of Miller Creek with additional gravel and woody
vegetation 
Removal of riprap from the Miller Creek channel 
Relocation of the existing 160th Street Air Operations Area (AOA) gate to 157th Street and
provide for emergency vehicle access into the AOA. 
Conversion and Modifications of the Construction Stormwater Ponds and stormwater basins
SDS6/7 
Restoration of sidewalk adjacent to Pond M along 154th Street 
STRATEGIC OBJECTIVES 
This request supports the Port's Strategic Objective to Exhibit Environmental Stewardship by
meeting required environmental mitigation obligations. 
ALTERNATIVES CONSIDERED/RECOMMENDED ACTION 
A. Do not proceed to perform the work. This would violate conditions of the permits that
allowed the Third Runway to be constructed. Not performing the work would invite fines,
degrade relations with Federal and State agencies and diminish the environmental
stewardship activities that the local communities and Port desire. This is not the
recommended alternative. 
B. Proceed to perform the work required by Federal permit conditions. This is the
recommended alternative.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
December 28, 2009 
Page 3 of 5 

FINANCIAL IMPLICATIONS 
Budget/Authorization Summary 
Original Budget                                         $587,362,000 
Budget additions                                         $541,594,000 
Total Budget                                           1,128,956,000 
Returned Savings                                       -$115,000,000 
Revised Budget                                    $1,013,956,000 
Previous authorizations                                    $1,128,956,000 
Current request for authorization                                        $0 
Total authorizations, including this request                    $1,128,956,000 
Remaining budget to be authorized                                $0 
Project Cost Breakdown 
Construction costs                                          $5,000,000 
Sales tax                                                    $475,000 
Outside professional services                                    $150,000 
Aviation Project Management and other soft costs                    $1,000,000 
Total                                                    $6,625,000 
SOURCE OF FUNDS 
This project is included in the 2009-14 capital budget and plan of finance within the Third
Runway program (CIP C100172). The funding source will be a combination of Passenger
Facility Charges (PFCs) and existing bond proceeds. These estimated costs will not cause the
total projected costs to exceed the revised budget, and will not affect cost per enplanement (CPE)
as these projects were already included in the CPE forecast. 
ECONOMIC IMPACTS 
The Third Runway project will have generated an estimated 900 jobs over the life of the
construction. The Runway indirectly supports the passenger and cargo airline industry and
related businesses in the region.
An estimated 30 different jobs of varying crafts with an approximate average duration of 3
months will be employed on-site to complete the construction contract.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
December 28, 2009 
Page 4 of 5 

ENVIRONMENTAL SUSTAINABILITY/COMMUNITY BENEFITS 
As a condition of the permits issued for the Runway project, rigorous environmental standards
for the quality of the fill material, construction stormwater treatment and air quality were
established. In addition the overall permit includes the restoration of 119 acres of land in the
Miller Creek and Des Moines Creek basins to pre-developed conditions and construction of 68
acres of wetland habitat in Auburn. This action allows for the completion of the construction of
the mitigation required under the permit. The mitigation sites require 15 years of maintenance
and monitoring. Should issues arise adaptive management techniques or solutions will be used
to correct future performance issues. 
TRIPLE BOTTOM LINE SUMMARY 
This action advances the runway project, which was developed in an environmentally
responsible way and overall is a vital regional transportation facility that supports economic
growth in many ways. 
PROJECT SCHEDULE 
Complete Design:       1St Quarter 2010 
Start Construction:       2nd Quarter 2010 
In-use Date:           4th Quarter 2010 
Project Completion Date:   4th Quarter 2010 
BACKGROUND 
On July 28, 2009, the Commission authorized the design for Miller Creek Relocation Revisions,
160th Street Culvert Removal, and Third Runway Environmental Mitigation at Seattle-Tacoma
International Airport as required by regulatory agencies to provide compensation for mitigation
functions not provided by the original Miller Creek Relocation Project that was completed in
September 2004.
The Commission fully authorized the Third Runway project which included the scopes of work
for the Miller Creek relocation and environmental mitigation requirements of the 404 and 401
environmental permits and the conversion of construction stormwater ponds to permanent
stormwater detention facilities for the Third Runway. The Third Runway was opened on
November 20, 2008. 
OTHER DOCUMENTS ASSOCIATED WITH THIS REQUEST: 
ATTACHMENT A: 2010 Airfield Improvement Projects Contract 2.

COMMISSION AGENDA 
Tay Yoshitani, Chief Executive Officer 
December 28, 2009 
Page 5 of 5 

PREVIOUS COMMISSION ACTION 
On August 1, 1996, the Commission adopted Port Resolution No. 3212, as Amended, approving
the Master Plan Update for Airport, including development of a new dependent air carrier
runway, and authorizing initial development work for the Runway project. 
On May 27, 1997, the Commission authorized $587,362,000 for completion of the Runway
project to be completed by 2004. 
On June 22, 1999, the Commission authorized an additional $186,000,000, increasing the total
authorization to $773,362,000. At that time, it was estimated permitting would be finalized by
December 1999 and the Runway project would be complete by fall 2006. 
On June 24, 2003, the Commission was briefed on additional costs from delays, permit
conditions, market conditions, scope of project, and FAA requirements. At that time, the
Runway project was scheduled to be completed at the end of 2008. 
On October 11, 2005, the Commission authorized an additional $125,000,000 increasing the total
authorization to $898,362,000. 
On September 26, 2006, the Commission authorized an additional $219,594,000 increasing the
total authorization to $1,128,956,000. 
On April 21, 2009, the Commission authorized the advertisement for construction bids for the
Lora Lake Demolition, Des Moines Nursery Mitigation and the Third Runway Stormwater Pond
Projects. 
On July 28, 2009, the Commission authorized design for Miller Creek Relocation Revisions,
160th Street Culvert Removal, and Third Runway Environmental Mitigation at Seattle-Tacoma
International Airport.