I did a little looking around. All HPX flights flown by the BE-1900D are shown as being operated by Air Midwest on Travelocity's timetables. This includes cities that see both Dash-8s and Beech's (YUM and FLG). Very interesting. The last time I was at PHX (July) there will still plenty of Beech's buzzing around the tarmac.
But the only routes flown by the Beeches now are to Kingman, Lake Havasu, Bullhead City, Prescott, Sierra Vista, Santa Fe (which is a new route), and Farmington, NM. And if those destinations were not subsidized somehow I don't see how they would support a Dash-8.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia