Yes, that third unit is an MLW. They did occasionally operate west of Toronto. Switching the grain terminals were CP 8122, 1694, 1212, 1573, and 8110.
Front and rear views of single-track plow 401005:
Double-track plow 400823 was coupled to two wood-chip service boxcars, with 31550 closest and three ore cars, including 376217 in the Canadian Pacific script scheme. Plows 401018 and 400777 were lettered CP Rail and spreader 402851 was also present.
Power on hand included switchers 7099, 6595 and 6588, plus 7090, 6594, Centuries 4704 and 4709, and C-424's 4214 and 4218, coupled to Conrail lease unit 7765. CP Rail was leasing 25 Conrail units and some Chessie System units in late 1985. The 6500's were being retired, so it's likely that some of these old switchers were very close to the end of their careers.