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White Rock Quarries Hosts Miami-Dade Limestone Association Field Trip
(4th Quarter 2011)
Community relations are important at White Rock Quarries
in Miami, FL, which hosts field trips for area schools and other organizations
with its mining contractor, North American Mining Corp.
Above: NAMC’s Ed Barnett and Hubie Perez, along with
WRQ’s Ronnie VanLandinham, lead a tour of White Rock's enormous
dragline. To get an idea of the machine's size, notice the
workers visible in the background at the base of the machine,
just over the shoulder of the middle tour guide.
Below: Students and their teachers stand in the
dragline's huge bucket, which can lift up to 105 cu. yds.
of limestone
(weighing about 150 tons or 300,000 lbs.) per scoop. Thick
cables and chains are used to hoist the bucket from the mining
pit. During mining, water from Florida's high water table
streams out through the holes, while the "shot rock" remains
inside the bucket. The material is dumped in stockpiles to dry,
then transported to onsite production facilities where various
sizes of aggregates and screenings are
produced for use as construction materials.
(Photos by Linda Maddy)
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