IAIS 504 heads power light out of IHB's Riverdale Yard with IAIS 510 leading over the Sanitary Ship Canal and some really neat bridges.
IAIS 504 & 510 take BICB off IHB trackage for Rock Island to head for points west in the late morning light.
ES44AC 504 leads the BICB through Marengo, Iowa on a sunny December afternoon.