The Oregon Pony, 
reported to be the oldest surviving steam locomotive  in the US outside the 
Smithsonian Instute.  It was built in San Francisco in 1863 or there about. 
It was used on a portage railroad along the Columbia River and in 1906 was 
used to haul debris from the earthquake out into the harbor.  Interesting 
little Locomotive that I hope one day to build in 1:20.3 scale or maybe 7/8 
scale.  It will depend on the wheel spacing.

Lloyd