Coos Bay Lumber Co. #10

This is a builder’s photo of the first Willamette. This engine is equipped with the patented Ball balanced D valves in the steam chest. An identifying feature of the early Willamette’s with D valves is the 3 large flat surfaces of the valve chests facing out from the locos. This engine was equipped with a 1500 gallon oil tank and a 4000 gallon water tank. Note the cast steel pilot beams, which were less preferred than the wood beams. The early engines were built using saturated steam, which is evidenced by the steam supply line coming down from the back of the steam dome.