I was disappointed when I found out that Bykenut's "Movies, Railroads, and History - Oh my!" (GC77DD) had been archived, so I placed a micro for the train part. I am looking forward to someone else resurrecting the great movie history of the area.
The cache is not at the posted coordinates, but can be found at:
N37 34.ABC W121 58.DEF
All the information you need will either be at the posted coordinates or nearby.
A = Twice the number of letters in the initials on the upper part of the plaque
B = 4th minus 2nd number in dedication year
C = Add the two digits of the chapter number together
D = Number of letters on the nearby hill sign
E = Number of letters in the middle word on the train car
F = Nada + nil + zip + 4*the number of train cars (according to updated coords from randy4fun)