4-8-8-2

The Southern Pacific was the only railroad to operate engines of this wheel arrangement, all of which were built by the Baldwin Locomotive Works.

[1] The locomotives were built as cab-forwards to protect engine crews from exhaust smoke and heat in the many tunnels and snow sheds that were part of their usual routes.

[1] Although commonly called Mallets these cab-forwards were built with simple expansion cylinders.

The name stuck because the original classes of Southern Pacific cab-forwards were built as compound Mallets, though these were eventually converted to simple expansion machines.

It was donated to the City of Sacramento, California in 1958, but had to be moved due to freeway construction.