U30B 846 and GP15-1 100 by Frisco.org Posted on March 12, 2025 U30B 846 and GP15-1 100 U30B 846 and GP15-1 100 at Thayer, Missouri on April 13, 1979 (R.R. Taylor). This entry was posted in RT Collection and tagged 100, 846, Electro-Motive Division, General Electric, GP15-1, U30B. Bookmark the permalink.