George Andrews Wrote:
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> The Espee AC - 9 Gila Monsters were indeed too big
> for the tunnels on Donner Pass. When they were
> re-assigned from Arizona / New Mexico to The Modoc
> Line, Espee had to route them via Dunsmuir &
> Klamath Falls enroute to Sparks, NV.
> Also, I've never heard or read of the tunnels on
> Donner Pass being enlarged for the cab - forwards.
> Rather, the cab - forwards were designed & built
> to fit through the existing tunnels. The tunnels
> and snowsheds were enlarged ( in some cases the
> floors were lowered ) in the early 1960's for
> autorack and piggyback clearance.

George, the AC-8s, AC 9-s and AC-10s were all the same
size. If one class would fit the Donner tunnels and sheds,
the others should, too.

Vertical clearance has nothing to do with it.

If not, why not? It's like saying this 13' 6" trailer
will fit under that 14' bridge, but another 13' 6"
trailer won't.

The tunnels were enlarged for the earlier ACs.