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Finning has supplied the first three Caterpillar 775B rigid dump trucks in Europe, to ECC Quarries' Moorcroft limestone site in Devon.Previously, 40 tonne capacity trucks were used at the quarry but because of the increasing haul distances and steeper gradients, ECC opted for the larger 60 tonne Cat 775s. The trucks are fitted with fully enclosed wet plate disc brakes - an essential feature because of the site's wet environment.The 775s also feature a Hardox 400 dumpbody and haul average loads of 62 tonnes of blasted limestone, which is being loaded by a Cat 988F high lift wheeled loader.The quarry trucks have to cope with poor ground conditions due to flowing water, as well as steep haul gradients of up to 10 per cent. And as the quarry has reached its boundary, the site is being made deeper and will eventually reach 35 m beneath ground level.Moorcroft produces about a million tonnes of Devonian limestone a year to serve the aggregates market in the South-West. The firm hopes eventually to increase production by expanding the site horizontally, if planning permission is given. CONSTRUCTION NEWS