REMOVE

1. Caboose
2. Diesel
3. Passenger
4. Cherry Creek

WHAT

1. Coal (1)
2. Coal Tower (1)
3. Crane (1)

WHERE

1. Cobre (1)
2. Currie (1)
3. East Ely (1)
4. Ruth (1)

WHO

1. Armstrong, W.R. (1)
2. Cordoni, A.V. (1)
3. Stork, A. (1)
4. Whitmore, J.P. (1)

WHEN

1. 1960s (1)