Upon further review, and talking to a friend who lives near there, the road is passable. However, he informs me that Phizer bought some of the property the road crosses, and has started mining the area. He warns me that there is a detour around the area that is very obvious, as 4 wheelers use it all of the time.
He suggested that an alternative route might be to take the Gould Road right into the Greylock Glen area. Follow the road past the maintenance building, and that trail/road joins up with the Notch Road farther north of the mining area. Food for thought?