I've started on the low relief structures of the board plant.
I made the basic blocks from foam core board, easy to cut and glue. Here they are against the profile board.
I then covered them with styrene sheets, stuck with transfer glue tape.
The first will be the chipper shed, where logs are reduced to wood chips.
Then the chip silo, where the chips are stored. The tube at the bottom is an auger to take chips from the silo to mixing room.
The resin silos, built form one chopped up Walthers plastic pellet silo.

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The furthest building will be the mixing room, which I haven't started covering yet.