Empty coal hoppers from the Bow, NH, power plant were on their way back to the mines for another load as they rolled past the Ayer, MA, tower behind Conrail power consisting of a pair of U33Bs and a GP40.
Photographed by Tom Nelligan, November, 1977. Added to the photo archive by Tom Nelligan, March 1, 2018. Railroad: Boston & Maine.