Selected Alternative
F1:
Pennock Island
Crossing – 200-foot High Bridge East Cannel
and 120-foot High Bridge West Channel
Click
image for more detailed view
Alternative
F1 crosses Pennock Island and the east and
west channels of Tongass Narrows. This alternative
would start at Tongass Avenue south of Tatsuda's
grocery store near the south end of the existing
rock quarry. The road would gain elevation in a
southeasterly direction, staying east of the tank
farm, the municipal cemetery, and the U.S. Coast
Guard Base. The road turns to the west, skirting
the south end of the U.S. Coast Guard Base property
and crosses the east channel of Tongass Narrows
to Pennock Island with an approximately 200-foot
high bridge (i.e., vertical clearance). The horizontal
navigational clearance of the east channel bridge
would be approximately 550 feet. The east channel
bridge is designed to accommodate larger cruise
ships. The alternative would then cross Pennock
Island at grade and use a second 120-foot high bridge
(i.e., vertical clearance) over the west channel
to Gravina Island. The horizontal navigational clearance
of the west channel bridge would be approximately
500 feet wide. The west channel bridge is designed
to accommodate Columbia-class Alaska State Ferry
system vessels. From the west channel bridge, the
road would continue northward approximately 5.9
miles to the north end of the Airport Reserve property.
An airport access road would be constructed at the
south end of the airport runway and turn northward
to the airport terminal. The road at the south end
of the runway would be constructed at a grade low
enough to allow for future runway expansion plans;
i.e., the runway could be expanded as an overpass
of the road.
