In the 1920s, the Willamette Iron and Steel Works of Portland, OR, constructed 33 Shay-type locomotives. Willamette locomotives were a refinement of the Shay especially suited for Pacific Coast logging. Their success led Lima to develop a "Pacific Coast Shay".
The Willamette included such standard features as electric headlights, air brakes, all-steel cab and girder underframe. These were extra-cost options on the Shays from Lima.
There was a 6-axle two truck Willamette on the drawing boards. This "Shay-killer" was never built.