Editor’s note: Steve Bowers has a question-and-answer column, “Tips From the Treeman,” in his newsletter for Oregon State University Forestry Extension. The following is taken from that column. Dear Treeman, I hear people talk about a railroad grade when they are discussing forest roads. I’m not sure if that has something to do with how the road was excavated — because it seems like it is cut down below the surface, so it sort of looks like a big trough — or is it how steep the road is? Thank you for anything you have to offer. Curious people want …