Summary #1:
Types of Ski lifts that ever existed at between 1 and 5 ski areas in the east (bolded means lift still exists):
Aerial Tramway: Jay Peak, VT; Cannon, NH, Mt. Snow (Air Car), VT
“Chain Drive” Double Chairs: Mt. Snow
Disc Lift (described earlier), Burrington Hill,VT; Birdseye, VT(2); Underhill, VT; Temple Mountain, NH. (all areas NELSAP)
Railroad: Mt. Washington (NELSAP), NH; Mt. Uncanoonuc, NH (NELSAP)
Skimobile: 2 at Cranmore, NH; 1 at Homestead, VA
Skis-on Gondolas: Mt. Snow, VT(2)
Cabriolet Lifts: Mountain Creek NJ, Mt. Tremblant ON, Stowe, VT
Chondola, Sunday River, ME
HSQ chair with mid-station loading/unloading: Le Massif, QC
Triangular path for haul rope: Killington, South Ridge
What can you add?