As described by the ASME, "The DWP used a vertical bucket line with an endless bucket chain to carry off the spoil. Working together, Ed and his father spent months in the family machine shop creating the prototype of what would be known as the DWP, which stood for Ditch Witch Power. Malzahn's idea was to create a compact trencher that would dramatically reduce the time and effort of this process. At the time, the process of installing residential utility services-electric, gas and plumbing lines-involved slow, tedious pick-and-shovel labor. In the late 1940s, Malzahn began to apply his mechanical engineering knowledge to inventing a device that he believed would be in great demand, once it was produced. In 1944, Charlie persuaded his son, Edwin "Ed" Malzahn (JDecember 11, 2015), by then an Oklahoma A&M (now Oklahoma State)-trained mechanical engineer, to join the business. After Gus died in 1928, Charlie renamed the business Charlie's Machine Shop. The business prospered, and several years later, with the advent of an oil boom, it began specializing in repairs for the nearby oil fields. The sons took over the business in 1913 and renamed it Malzahn Brothers' General Blacksmithing. In 1902, Carl Frederick Malzahn, a German immigrant seeking to escape the harsh winters of Minnesota, moved his family to Perry, Oklahoma, and opened the Malzahn Blacksmith Shop with his sons, Charlie and Gus.
Because of its extensive experience in construction of subterranean structures and systems, CMW and Ditch Witch have been called, "The Underground Authority." The company is a source for trenchers, vibratory plows, horizontal directional drilling systems, drill pipe, downhole tools, vacuum excavation systems, fluid management systems, and mini skid steers. The Ditch Witch organization specializes in the design and manufacture of underground construction equipment. Innovation of Ditch Witch machines started in the 1940s when a compact trenching machine was created to replace the pick and shovel for installation of underground residential utility services. Charles Machine Works is, since 2019, a subsidiary of Toro Company. It is the leading subsidiary of Charles Machine Works, headquartered in Perry, Oklahoma. Desktop or laptop computer which meets or exceeds the following specifications: Intel® Core i5, 3.4 GHz or higher, 8 GB RAM, 4 USB 3.0 ports and 4 USB 2.0 ports, NVIDIA® GeForce GTX 1050 or equivalent graphics card, onboard sound, Windows® 7 Professional or Windows® 10 Professional, flat screen monitor supporting 1920 x 1080 resolution.Ditch Witch, a trade name of Charles Machine Works, is an American brand of underground utility construction equipment, which has been in operation since 1949.
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