Glensanda: Difference between revisions

To minimise visual impact from the coast the quarry is sited a mile inland, and cut down into the mountain 1,600 feet above sea level. Each explosive blast dislodges about 70,000 tons of granite, which is transported by dump truck to the primary crusher, which reduces it to lumps no bigger than nine inches in diameter.{{r|Indy}} It is then transferred by conveyor belt to a heap that covers the "glory hole", a 1,000 ft vertical shaft 10 ft in diameter, which is permanently full of rocks. At the base of the glory hole, deep inside the mountain, rocks are transferred to a horizontal conveyor and moved through a mile-long tunnel to the second crusher on the shore, where oceangoing ships are loaded in the deep-water docks at the rate of 6,000 tons per hour.{{r|Indy}}

 

 

Reserves of granite are estimated to last at least until the year 2100, when the excavation will have created a new [[Cirque|corrie]] a mile and a half square and 400 feet deep.{{r|Indy}}