Dirty kitty By Angela Cotey | July 31, 2024 | Last updated on August 7, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Covered in coal dust, Chessie System GP40-2 No. 4156 and a mate in Baltimore & Ohio blue lead a coal train onto the Old Main Line at Point of Rocks, Md., in 1983. Michael S. Murray photo