This Johnson Bros. (USA) Locomotive Type Boiler was from a steam shovel (that moved on rails) that excavated rock and soil during the construction of Stevens Weir near Deniliquin NSW in 1934. It has a working pressure of 100psi. This is an example of a fire tube boiler where the fire from the fire box heats the water surrounding the fire tubes running through the boiler, smoke escapes out the smoke stack and the steam is captured in the dome and sent through pipes toward other engines in the Port of Echuca Steam Display. Two glass gauges are fitted on the side of the firebox. Two safety valves are fitted at the top of the boiler to maintain the correct and safe pressure. It still functions today for visitors most days of the week.A good example of the technology and industrial history of the Riverina region of southern NSW and northern Victoria. It is an integral part of the Port of Echuca Steam Display running secondary engines off the steam produced within this boiler. Large cast iron, fire tube boiler with 124 fire tubes, fire box, steam dome and exhaust chimney. boiler, johnson bros, steam display, kevin hutchinson steam shed