This shovel first began its work in Harrison County, Ohio in 1944, moving on to other coal fields in Ohio through the 1970s. The Tiger shown during a 1950s field tour. The photo below shows a portion of The Tiger in 1957 near Cadiz, Ohio. At the time, it was considered to be the world’s largest shovel, used to help mine coal for the steel mills during WWII. The shipping and assembly of the shovel began in 1943, and by the following year, The Tiger was ready to begin digging. But even for that “small” shovel, mining historians noted that it took about 63 trainloads to ship its parts from Marion, Ohio to Hanna’s Georgetown coal complex south of Cadiz, Ohio in Harrison County, where it was assembled. The smallest of Hanna Coal Company’s earth movers involved in the I-70 controversy, The Tiger, was among the company’s first big shovels, built in the early 1940s. And in these cases, the size and power of the giant shovels and draglines used in those areas made that level of extraction possible. However, at some surface mines in Ohio, highwalls of up to 200 feet high remain where five-foot-coal seams have been extracted. Generally it is economic to strip mine when there is a 20:1 ratio of overburden-to-coal seam, meaning, for example that a three-foot coal seam can be surface mined economically when the overburden is up to 60 feet. Surface mining existed as well, but it wasn’t until the big shovels came on in the 1940s and 1950s that strip mining began to take a larger portion of the state’s annual coal production. Most of the mining in Ohio through the 1930s was in deep mines or shaft mines that bore into mountainsides. Coal is found in 32 counties in Ohio, though primarily in the southeastern part of the state which is located on the northwestern edge of the Appalachian Coal Basin, one of the largest coalfields in the U.S.Ĭoal has been mined in Ohio since the early 1800s, initially with crude mining techniques working surface outcroppings, to more sophisticated mechanized technologies that evolved following WWI and WWII. The Acco Superdozer moved under its own power onto the trailer that took it to the new location.Various coalfields in the tri-state OH-PA-WV area are shown in color, overlaying county boundaries – a region where coal has been mined for decades in the Appalachian Coal Basin. īy the end of May 2012 the dozer had been moved away from the abandoned Acco facility and is now safely stored at a gardening company in the same town, to be preserved and eventually put on display. Beginning in 2008, Acco's former main and secondary shops slowly turned into a dumping ground for surplus earth moving machinery, including the super bulldozer and its brother, a 200-ton super grader. They left no legacy for managing the Acco company. ![]() Īcco ceased to exist when its founder Umberto Acco died and his son died shortly afterward. This bulldozer has never been put to any operational use and was put into storage where it was built. As a direct consequence of these trade restrictions, the completed Acco Dozer was never shipped to its intended destination. As the Leader of Libya, Colonel Gaddafi, was heavily involved with international terrorism at that time, the United States imposed a trade embargo on that country in 1986. This bulldozer was initially built to be exported to Libya in the early 1980s to help in land development. The ripper alone is about 10 feet (3.0 m) tall, being powered by huge hydraulic rams. The super bulldozer has a blade that is 23 feet (7.0 m) wide and 9 feet (2.7 m) high, whilе the total length of the bulldozer is over 40 feet (12 m), from the tip of the blade to the ripper on the rear. This bulldozer has a gross weight of 183 tonnes and is powered by two 675 hp (503 kW) Caterpillar engines placed horizontally opposed, which deliver a total combined output of 1,350 hp (1,010 kW). The dozer blade, for example, is bigger than anything Caterpillar has ever made. The Acco super bulldozer was constructed mainly of Caterpillar parts however, many other components were specially adapted. It was built in Portogruaro in northern Italy by the Umberto Acco company. ![]() The Acco Super Bulldozer is the largest and most powerful tracked bulldozer ever made. Unsourced material may be challenged and removed.įind sources: "Acco super bulldozer" – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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