Contents of the Seattle RTG:

SEARTG1.LTG     Seattle local RTG, connects to district RTGs
SEARTG2.LTG     Seattle international RTG
SEATTLE1.LTG    Downtown Seattle RTG, system 1 of 3
SEATTLE2.LTG    Downtown Seattle RTG, system 2 of 3
SEATTLE3.LTG    Downtown Seattle RTG, system 3 of 3
TACOMA.LTG      Tacoma RTG
