|PRR half GG1 (perhaps it's a G1) 4846 at Wilmington, Delaware, on an unknown day in April 1979, photo by Chuck Zeiler. I happened upon this while passing through Wilmington on a business trip. It appears to have a duct directed towards the track at the rear of the unit, suggesting that perhaps it was used to clear snow in the yard. Although this is in the Conrail timeframe, it is unlikely this unit was on the CR roster. One source indicates that this was once #4846.