The Ketichikan Aiprort is located on Gravina island. Ketichikan and a couple of smaller villages are on the mainland peninsula. The bridge isn't intended to give the island residents easier access to the mainland, it is to give the peninsula's residents access to the airport.
It appears the terrain on the peninsula is too mountainous for an airport.
It appears that there is no land route to the entire peninsula, the only way to get there is by ferry.
Can't confuse the people with the facts. So much nicer to keep shrieking about a bridge to nowhere without any facts at all.
I assume you've never flown into, or out of, Charleston, WV...
Where I come from, we call those islands...
Seriously, though, I can see no justification for this extraordinary expense. A new road off the PENINSULA to a new airport could probably be built cheaper. It is just another transfer of wealth...
Then let the local or State Government pick up the tap.
Does not pass the General Welfare smell test if you ask me.