Mainly they justify Class C because of IFR traffic en route, and because there are about 40-50 commercial flights per day in and out of MLI. Also there are a few relatively heavy traffic Class E and G airports around (Davenport, Clinton, Galesburg, Muscatine). The DC-9-30 freighter you saw was Airborne Express, Flys out every night to somewhere...haven't figured out where. FedEx flys 3 caravans out per night also. Mostly is an RJ
airport right now but AirTran flys 3 717's in per day i believe, and for RJ
's they get from Comair, United Express, Northwest Airlink, and American Connection...i think AC
only flies ATR's. Their is a new terminal, i believe the airport has 8 gates all with Jetways. From a pilots standpoint the folks in the tower are the nicest folks. I have been to many D C and B airports and Centre's in my flying career but i have yet to find anyone has pleasant as the folks at QC
. I guess i consider QC
my home airport too.