The Power House for the Trans-Mississippi Exposition housed a number of machines from various places. There were four 500 H.P. Climax Boilers, in addition to two 250 H.P. Climax Boilers. Marsh and Dean Duplex each supplied a 10"x6"x10" feed pump, and a 7.5"x5"x6" feed pump was supplied by Worthington. The building also housed six engines, three of which were provided by Westinhouse. The others were provided by Buffalo Forge, Murray Iron Works, and Hamilton Corliss.

All of the power combined to a force of 2,000 available engine horse power. Coal consumption was under 17 pounds per kilo-watt hour, and there was a cost of $.44 per kilo-watt hour. A GE generator, with alternating and direct current, was used for to power the exposition.

The total cost of the building wa $10,463.05. It was 18' high, and 150'x120' at the base of the building.

This was the very heart of the Exposition, that sent power through copper wire to every portion of the grounds giving light and life to every portion of the enterprise. This great battery of huge tubular boilers, capable of transformed tons of water into steam hourly and furnished the motive power for the great engines that worked day and night. The generation of both power and light in the building fought with interest and was the objective point of nearly everyone who passed through the gates. The heavier machinery was exhibited here in active operation. From the beginning of May until the middle of November at no time did the machinery stop. Not a single accident occured during the season.

The new principal machinery in use was placed as exhibits and consisted of Corliss horizontal and upright engines, powerful dynamos, electric appliances, steam pumps, injector valves, steam traps, steam pipe and coverings, and belting.