Richard Hendrickson wrote:

In the '50s coal for the Kaiser steel mill at Fontana came across Cajon Pass in MoPac hoppers, though I don't know where it came from. The Kaiser mill was the only So. Calif. recipient of coal in significant amounts.

Nearly all this coal was western Colorado/eastern Utah coal. There are photos of both Utah Coal Route gons, and D&RGW gons and hoppers, at Kaiser. Given the historic connections and cooperation between Mopac and the Rio Grande, one can imagine some car sharing.

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