CNW 6719 mixes with a UP U30C and other power on a gray snowy day at Proviso Yard located in Berkeley, IL, just east of suburban Elmhurst. Proviso was CNW's only hump yard, de-commissioned by UP this year. It was at one time the largest railroad yard in the U.S. CNW 6719 is an Alco C628 of Norfolk & Western heritage.
