GP18 No. 904 returns to Boston Engine Terminal in Somerville, MA after dumping stone on the Worcester Mainline. The crew is shoving 7 empty stone cars Eastbound on the "Brickbottom Lead" which runs between Swift and Steward interlockings parallel to the Fitchburg Route mainline. The recently rebuilt snow flanger acts as a shoving platform for the Conductor and Brakeman.