4c supp

Item No. 4c_ supp_______ 
Meeting Date: October 25, 2016 
Cargo 2 - 400 Hz In-ground Power Station Retrofit 
Cargo 6 - 400 Hz In-ground Power Station Retrofit 
2017 Airfield Pavement Project 
Seattle-Tacoma 
International Airport 
(STIA) 


1

Construction Overview 


Cargo 6                    Cargo 2 


Two Construction Locations: Cargo Area 2 and 6 
2

Existing 400 Hz In-ground Power Station 



Safety concerns were raised after the existing 400 Hz power stations were installed. 
3

400 Hz Pop-up Power Station 



400 Hz pop-up power station is the recommended retrofit alternative. 
4

2017 Airfield Pavement Project 



An aircraft parking at Cargo Area 2 with the right main gear on asphalt pavement not designed for such a load. 
5

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