I have seen several hints that the Boston and Maine loaded and hauled gravel trains out of a sand pit in Madbury, NH. I have even seen some pictures of a trio of GP7s bringing a gravel train down the main in Madbury. However, there doesn't seem to be any evidence of a spur line branching off from the mainline. Also, both of the sand pits that I could see on Google maps seemed rather far away from the main, meaning a substantial spur would have to have existed to reach one/them. Any ideas?
"Every foot of track of the B&M, mainline or branch, rain or shine, needed or not, was the scene of legitimate human endeavor." -Robert Willoughby Jones