As of 11/14/2012 US Airways has begun operations from Gates 52 & 56 in Concourse "D" at MKE. Some operations are still operating from Concourse "C" until the move is completed over to "D"
MKE Arrival/Departure Info now shows US Airways still operating from "C" Gates. Best advise until move from "C" to "D" Concourse is complete check with US Airways regarding gate location(s) - UPDATED 11/14/2012