U30B 5790 (Frisco 852) by Frisco.org Posted on February 14, 2014 U30B 5790 (Frisco 852) U30B 5790 (Frisco 852) at Omaha, Nebraska on December 10, 1980 (Jerry Bosanek). This entry was posted in BN Patched, RT Collection and tagged 5790, 852, General Electric, U30B. Bookmark the permalink.