Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); with westbound empty utility bathtub coal gondolas about six miles west of Mullen, Nebraska on August 23, 1981. Photo by Al Christianson.

Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); with westbound empty utility bathtub coal gondolas west of Mullen, Nebraska on August 23, 1981. Photo by Al Christianson.

Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); passing Alliance division 1st Subdivision milepost 269.5 with westbound empty utility bathtub coal gondolas at Mullen, Nebraska on August 23, 1981. Photo by Al Christianson.

Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); with westbound empty utility bathtub coal gondolas about four miles west of Mullen, Nebraska on August 23, 1981. Photo by Al Christianson.

Burlington Northern Type U30C Number 5812, built September 1973; C30-7 Number 5598, built June 1979; and a U30C (number unknown); with westbound empty utility bathtub coal gondolas east of Alliance, Nebraska on August 23, 1981. Photo by Al Christianson.