Item No.         10a_supp
Date of Meeting        July 26, 2022
Flight Corridor Safety Program 2024
Seattle-Tacoma
International Airport

      Flight Corridor Safety Program - Overview
•  An ongoing program to remove trees around
SEA to improve safety during takeoffs and
landings and replant in their place, native,
lower height trees
•  Trees either are penetrating SEA’s airspace or
are expected within approximately the next
five years, to penetrate SEA’s airspace and
pose a hazard to flight operations
•  Program first launched in 2014
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       Flight Corridor Safety Program - Purpose

•  The FAA requires the Port of         •  Washington State law
Seattle to ensure there are            declares that the creation or
no obstructions on or                 establishment of airport
around SEA that could affect          hazards is a “public
flight safety                              nuisance”
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 Obstruction Removal/Replanting Numbers To Date
Property Owner       Trees Removed   Trees Planted/To be Planted
Port of Seattle                        789                            3,800
WSDOT                    102                  8,000
Other Public Entities                   47                              188
Private                                40                             160
Total                                    978                             12,148
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           Environmental Commitment
•  Port-initiated SEPA Process includes public
comment opportunity
•  Replanting native species either onsite or nearby
off-site properties
•  Replant native species at a 4 to 1 ratio or better
•  Utilize best management practices to minimize
environmental impacts

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           Outreach & Communications
•  Agency/city coordination                  •  Individualized private
•  Airport-specific listservs                     property efforts
•  Connections e-newsletter                 •  Highline Forum briefings
•  Online open house                        •  Public information/input
•  Project-specific email address               sessions
•  Neighborhood canvassing


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         Flight Corridor Safety Program 2024
•  Request for Commission authorization for the ED to:
– Advertise/execute a professional service agreement for technical
expertise/support;
– Complete aerial data collection, field verification and analysis to identify
obstructions at and around airport for 2024 Program scope refinement;
– Conduct environmental review; and
– Execute agreements with public agencies as
needed for purposes of obstruction
management.
•  Estimated cost: $500,000
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        Flight Corridor Safety Program 2024
- Schedule
Advertisement for Professional Service Agreement    2022 Quarter 3
Aerial Obstruction Data Collection                    2023 Quarter 3
Commission Design and Construction Authorization   2024 Quarter 3
Design Start                                          2024 Quarter 3
Construction Start                                    2024 Quarter 4
Construction Completion                           2025 Quarter 4 to
2026 Quarter 4
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         Flight Corridor Safety Program 2024
- Budget
Cost Estimate/Authorization Summary                                To tal

COST ESTIMATE
Original estimate                                                  $9,700,000
AUTHORIZATION
Previous authorizations                                              100,000
Current request for authorization                                    500,000
Total authorizations, including this request                             600,000
Remaining amount to be authorized                            $9,100,000
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         Flight Corridor Safety Program 2024
- Risk
•  The total estimated program cost may change based on the
obstructions identified during the planned fly-over survey in 2023.
– The current total estimated program cost is based on the
estimated obstructions identified in the fly-over survey
conducted back in 2018.

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