Yellowstone

1928 · Northern Pacific Z-5 · Work 15 of 1,871

Yellowstone, 1928, Northern Pacific Z-5

A Northern Pacific Yellowstone Mallet locomotive in a snowbound mountain cutting, immense firebox glowing at the cab, drifts banked high against the plough.

What it was used for
Northern Pacific freight burning the poor coal from the railroad's own open-cast mine in Montana.
What was new
The grate is the largest ever fitted to a locomotive. It follows not from ambition but from the fuel: bad coal needs area.