There are, indeed, Hoosac electrics on the DLS for TS10-12. And yes they are Balwin-Westinghouse built. The original motors were built specifically for the Hoosac Tunnel service, and several New Haven EP-1's were later added to the roster.
Yes, the New Haven had control of the B&M at that time; though evidence suggests there never was any serious consideration of electrifying all the way to Boston. The tunnel was electrified simply to alleviate the asphixiating effects of smoke on crews and passengers.
This route was one of the busiest in New England at one time. The tunnel was a bottleneck to east-west traffic and ran 'round the clock. The trackage in the area is only a fraction of what it once was.
Just wandering about the completed DEM map in Trainz, one can appreciate the enormous effort in construction, and the capitol invested in track and service facilities (I'm using USGS mid to late 1940's overlays).
I would love to go back out to the North Adams area when The Cheif Mate gets her week off in April, but we're already commited to North Conway for the week. Maybe I can sneek sumthin' in during the summer. Last time we were out that way, about 5 years ago, I let her drive. She took that hairpin turn and decent into North Adams about 10 mph more than a rational person ought to able too. I nearly pee'd my drawers.
I certainly let her know how I felt about her driving!
I'm beginning to suspect the electrification ended (somewhere?) around Hoosac Station. It's another windy 22 miles or so eastbound to any facilities at Deerfeild. From what I could gather so far, maintenance on the electrics was performed at North Adams.
mike