A consist of howling tunnel motors drags a hefty eastbound manifest up the torturous grade just west of Caliente.
An Eastbound Southern Pacific freight hits the East switch of Canyon siding below the Mormon Rocks near Sullivan's Curve.
Crew change.
That's the Price River.
This was pretty much standard helpers for the Tehachapi Mountains during the seventies and eighties. 4 of the 6 units were tunnel motors.