At Savage Stone’s 161.9ha quarry in Jessup, Maryland, gabbro is extracted from five 13.1m-tall benches, with chemical rock hardness increasing with each lower level.
The shot rock (similar to granite and good for coarse road base) used to be loaded into Volvo 31tonne and 36tonne capacity articulated haulers and 90tonne capacity Euclid rigid haulers and transported 800m uphill to the primary crusher, a Lippmann 5062 jaw crusher. The jaw crusher processes rock to 127-178mm, which is then stockpiled on the s
