6c Airfield Pavement Replacement Presentation

Item No. 6c
Meeting Date: October 22, 2019
2021  2025
Airfield Pavement and Supporting
Infrastructure Replacement Program

Program Scope
Continue programmatic approach of replacing distressed airfield
pavement, joint sealant, and supporting infrastructure at Seattle-
Tacoma International Airport
Previous 20-years of airfield investments focused on the airfield's
runway and connecting taxiway system
This CIP will focus on replacements of damaged, high traffic
pavements (and failing utilities beneath those pavements)
supporting aircraft access to the terminals and apron areas

2

Program Goals
Focus on airfield assets having the following criteria:
(1) significantly exceeded design life
(2) continual need for emergency repair
(3) high strategic value to airfield operations
Maximize FAA Grant Funding  Entitlement & Discretionary
Minimize and plan for operational impacts by performing early
programmatic construction phasing
Minimize operational impacts by replacing utilities concurrent to
pavement replacement

3

Infrastructure Condition and Age:
Existing pavements designed for 20-year life now up to 50
years old (average 43 years)
Existing pavement thickness as thin as 14 inches (average 16
inches) compared to current design of 20 inches or more
Current aircraft size and number of operations have cracked
and damaged oldest pavements
Airfield-wide failures of aging utilities  many more than 50
years old

4

Infrastructure Condition and Age:



5

2021 to 2025 Overall Airfield Pavement and
Supporting Infrastructure Replacement Program
JONIT SEAL
REPLACEMENT, TYP.



PAVEMENT REPLACEMENT,
TYP.

UTILITY
REPLACEMENT,
TYP.

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2021 to 2025 Budget
Total CIP Estimate                            $156,300,000
Value of Pavement Reconstruction            $114,200,000
Value of Utility Upgrades and Replacements    $ 42,100,000
Estimate of FAA Grant Contributions*          $ 49,400,000

*Should more FAA discretionary grant money become available for this program as
packaged, the estimate of total FAA-eligible construction costs are up to $81,000,000
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2021 Project Schedule
Commission Authorization for Design            Oct 2019
30% design                                Dec 2019
FAA Pre-Design Conference                    Jan 2020
Safety Risk Management Panel (SRMP)          May 2020
Authorization for bid, award and construction    Oct 2020
Advertise for Bid                                Nov 2020
Construction start NTP                         Mar 2021

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