6e Supp
Runway 16R/34L Usage



1

Roles & Responsibilities
FAA
Manages air traffic & use of runway
Port of Seattle
Operator of Airport
Manages airport facilities/infrastructure
Manages community noise programs

2

Need for New Runway
The driving factor in pursuing a new runway was the
impact of airline delays caused by poor weather. Lower
visibility conditions occur approximately 44% of the
year.
The new runway will also increase the airports operating
efficiency during all weather conditions.



3

Common Community Comments
More noise than expected
Using runway more than promised
Thought runway was to be used in bad
weather only
Want more mitigation


4

FAA Runway Usage Plan
South flow arrivals  good weather
South flow arrivals  lower visibility
South flow departure demand






5

Operations Comparison

1997 Supplemental
EIS Master Plan
Update year 2010           Current
Projections     2010 Projections
Total Annual Operations                 475,230            338,000
Daily Operations                        1,302               926



6

Changes in Sea-Tac Fleet Mix
Significant numbers of noisier aircraft have been eliminated from the
fleet mix, or reduced usage, since the 1997 EIS Master Plan Update
projections.

EIS 2010 Projected        2009 Current
Ops by Aircraft                 % Annual Ops       % Annual Ops
Boeing 767-200                      2.0%             0.0%
McDonnell Douglas DC8-70               1.5%            0.0%
McDonnell Douglas MD11               0.8%            0.1%
Fokker F-100                        0.9%             0.0%
Fairchild F-28                           2.5%               0.0%
McDonnell Douglas MD82/83             12.1%            1.0%


7

Runway Usage Statistics

Arrivals                                            Departures
EIS                                                  EIS
assumptions Dec. 2008  Jan. 2009 Feb. 2009                         assumptions Dec. 2008  Jan. 2009 Feb. 2009
for 2010   Actuals   Actuals   Actuals                               for 2010   Actuals   Actuals   Actuals

South traffic flow (subtotal):       61.1%    75.7%    91.1%    63.7%      South traffic flow (subtotal):       61.2%    74.7%    90.5%    62.9%
Runway                                          Runway
16L             17.5%   20.8%   28.8%   25.7%            16L             25.2%   49.2%   69.4%   43.0%
16C           15.9%   29.4%   26.6%   20.3%           16C           33.5%   25.2%   20.9%   19.8%
16R           27.7%   25.5%   35.7%   17.7%           16R            2.5%    0.3%    0.2%    0.1%
North traffic flow (subtotal):       38.9%    24.3%     8.9%    36.3%      North traffic flow (subtotal):       38.9%    25.3%     9.5%    37.1%
Runway                                          Runway
34L             16.4%    9.6%    2.7%   13.3%            34L             1.6%    0.6%    0.3%    1.0%
34C           17.2%    4.2%    3.4%    6.9%           34C           14.2%   13.7%    3.8%   20.3%
34R            5.3%   10.5%    2.8%   16.1%           34R           23.1%   11.1%    5.4%   15.9%
Total               100%    100%    100%    100%             Total               100%    100%    100%    100%


8

65 DN L cl0 r 20 1 0










9

Prior to Opening the Third Runway
Noise Mitigation
64 homes acquired and residents
relocated in the North Approach Transition
Zone (ATZ)
87 homes sound insulated north of third
runway
27 homes directionally sound insulated

10

Projected Air Quality and
Climate Benefits
Decreased delays from 5 minutes to 2
minutes
50,000 tons of CO2 reduction
170 tons of nitrous oxide reduction
425 tons of carbon monoxide reduction


11

Part 150 Process Preparations
Community Outreach

Analyze flight track and noise data we are
currently collecting
Launch the formal Part 150 public process in
November 2009
Develop project schedule

12