01
The cars come in loaded
A string of covered hoppers arrives at the Main Street Terminal off the coast run. They stand on the receiving track with a pit underneath them that you would never notice from the ballast.
Main Street Terminal · Fort Worth
02
Spotted over the pit
The car is pulled forward until one discharge gate sits square over the pit opening. Everything that follows depends on this: the spot is the job.
3 285 cf · two bays · 41'-10½" over pulling faces
03
What is under the track
A concrete pit, a receiving hopper, and a connector parked below the top of rail — far enough down that a train can run over it at speed and never touch it.
Gate sits 1'-6½" above the rail
04
The connector rises
Air over hydraulic lifts the head about two feet, straight up through the slot in the deck, until a compression gasket meets the underside of the car's discharge frame and stops.
No one goes under the car
05
And makes an airtight seal
The gasket squashes against the steel and the joint closes. From here to the silo the cement is inside a sealed system — and because the connector keeps rising as the car lightens, the seal holds from full to empty.
Sealed, full to empty
06
The gate opens
The gravity slide runs back and a hundred tons of powdered cement drops into the boot. Displaced air goes back up into the car, because there is nowhere else for it to go. Nothing plumes, nothing blows away.
~116 tons per car
07
Into an enclosed belt
Below the pit the cement lands on a covered belt in a tunnel, running under the track toward the elevator. Covers the whole length, skirted at the loading point, no open transfer anywhere.
Covered, skirted, continuous
08
Up the bucket elevator
At the end of the belt a leg picks the cement up in buckets and carries it to the top of the silos in one closed column. Displaced air goes out through a baghouse, not into the neighbourhood.
Enclosed casing · filtered vent
09
Into storage
A gravity distributor at the head sends the load to whichever silo is called for, and it is held under aeration until a truck comes for it.
Aerated cone discharge
10
Empty, and back out
The connector drops clear, the puller takes up the slack, and the next gate comes over the pit. One car at a time, all day, without a shovel or a man underneath.
Then the whole thing again
