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Message: <blockquote data-quote="sihina_lahiru" data-source="post: 9081469" data-attributes="member: 149577"><img src="http://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Bagger-garzweiler.jpg/500px-Bagger-garzweiler.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The Bagger 288 was built for the job of removing <a href="http://en.wikipedia.org/wiki/Overburden" target="_blank">overburden</a> prior to coal mining in <a href="http://en.wikipedia.org/wiki/Tagebau_Hambach" target="_blank">Tagebau Hambach</a> (stripmine Hambach), <a href="http://en.wikipedia.org/wiki/Germany" target="_blank">Germany</a>. It can excavate 240,000 tons of coal or 240,000 cubic metres of overburden daily – the equivalent of a <a href="http://en.wikipedia.org/wiki/Association_football#Pitch" target="_blank">football field (soccer)</a>  dug to 30 m (98 ft) deep. The coal produced in one day fills 2400 coal  wagons. The excavator is up to 220 m (721 ft) long and approximately  96 m (315 ft) high. The Bagger's operation requires 16.56 <a href="http://en.wikipedia.org/wiki/Megawatts" target="_blank">megawatts</a> of externally supplied <a href="http://en.wikipedia.org/wiki/Electricity" target="_blank">electricity</a>.<a href="http://en.wikipedia.org/wiki/Bagger_288#cite_note-bagger-0" target="_blank">[1]</a>  It can travel 2 to 10 m (6.6 to 33 ft) per minute (0.1 to 0.6 km/h).  The chassis of the main section is 46 m (151 ft) wide and sits on 3 rows  of 4 <a href="http://en.wikipedia.org/wiki/Caterpillar_track" target="_blank">caterpillar track</a> assemblies, each 3.8 m (12 ft) wide. The large surface area of the tracks means the <a href="http://en.wikipedia.org/wiki/Ground_pressure" target="_blank">ground pressure</a> of the Bagger 288 is very small (17.1 N/cm2  or 24.8 psi); this allows the excavator to travel over gravel, earth  and even grass without leaving a significant track. It has a minimum  turning radius of approximately 100 meters, and can climb a maximum  gradient of 1:18. The excavating head itself is 21.6 m in diameter and has 18 buckets each holding 6.6 cubic meters (7.9 yd³) of overburden. By February 2001, the excavator had completely exposed the coal  source at the Tagebau Hambach mine and was no longer needed there. In  three weeks it made a 22 kilometer (14 mile) trip to the <a href="http://en.wikipedia.org/wiki/Tagebau_Garzweiler" target="_blank">Tagebau Garzweiler</a>, traveling across Autobahn 61, the river <a href="http://en.wikipedia.org/wiki/Erft" target="_blank">Erft</a>, a railroad line, and several roads. The move cost nearly 150 million <a href="http://en.wikipedia.org/wiki/German_mark" target="_blank">German marks</a>  and required a team of seventy workers. Rivers were crossed by placing  large steel pipes for the water to flow through and providing a smooth  surface over the pipes with rocks and gravel. Special grass was seeded  to smooth its passage over valuable terrain. Moving Bagger 288 in one  piece was more economical than disassembling the excavator and moving it  piece by piece. The Bagger 288 is one of a group of similar sized and built vehicles,  such as Bagger 281 (built in 1958), Bagger 285 (1975), Bagger 287  (1976), <a href="http://en.wikipedia.org/wiki/Bagger_293" target="_blank">Bagger 293</a> (1995), etc.<a href="http://en.wikipedia.org/wiki/Bagger_288#cite_note-bagger-0" target="_blank">[1]</a><img src="http://t1.gstatic.com/images?q=tbn:ANd9GcQRtyay_LpWSRoRrz_ZfZzAH1xxt9Waf-Kq64LHcBlf85TGnsaN7A" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://t2.gstatic.com/images?q=tbn:ANd9GcQSz6JZpDSpNIYJRSuwgOiAwAn3Z6_iobim9XSpKBwq9cQPTWAFpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcQWTbpnNCrdViB4mZjC4Ma06Jie-THHbkwa5Jugs4EUeFr9ecNELw" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcSt8-T0Nr0XmC5rb3S9NzGznXjGH46GrIiWebR0ZK0VkTJxF3AxVxJK9z1t" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

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