A typical view of the pit walls.
Most aggregate in the pit is relatively small - usually less than 175 mm (7 inches) in diameter.
Bulldozer pushing new aggregate into the pit from above.
Large loaders used for extracting the aggregate from the pit.
Loading aggregate from the pit.
Loaders dump aggregate onto the coveyor system through grated recepticals called "grizzlies".
A grizzly removed from service.
Coveyor system transporting aggregate from the pit to the crushing and stockpiling location.
Uncrushed aggregate is often stored in a stockpile until it is crushed.
Uncrushed aggregate on the conveyor system.
Crusher facility receiving uncrushed aggregate from the storage stockpiles.
This particular crushing facility features two cone crushers (seen here) and an impact crusher.
Disassembled cone crusher.
From the crusher, the aggregate can be transported to a screening facility to be separated into constituent sizes.
Close-up of a screen deck.
Screens used in this particular facility are made of durable polymer to increase their useful life and reduce noise.
After sorting by the screening facility, aggregate is store in speparate stockpiles according to size.
Aggregate is removed from stockpiles from the bottom by coveyor. This shows the coveyor tunnel and counterweight.
A close-up of the conveyor tunnel.
The discharge from the stockpile to the coveyor in the tunnel.
Loading a truck with aggregate.
Weighing a loaded truck before it leaves the facility.
Barge loading facility. This particular facility ships about 80 percent of its aggregate by barge.
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