Cable Driving Plant, Designed and Constructed by Poole & Hunt, Baltimore, MD. Drawing by P.F. Goist, circa 1882. The powerhouse has two horizontal single-cylinder engines. The lithograph shows a hypothetical prototype of a cable powerhouse, rather than any actual built structure. Poole & Hunt was a major cable industry designer and contractor and manufacturer of gearing, shafting and wire ropes. They did work for cable railways in Baltimore, Chicago, Kansas City and Philadelphia.