Lean Machine

Holliday Rock's plant in Bakersfield, Calif., started operating in 2009.

Environmental coordinator George Smith looks over the aggregate bin. The plant receives its aggregate from the company's own pit 50 miles away.

Chris Allen (left), Holliday Rock's area operations manager, talks with environmental coordinater George Smith while concrete is discharged into a truck.

Conveyors transport materials from storage bins to the batcher.

Left to right, environmental manager George Smith, lead batchman Randy Hatfield, and area operations manager Chris Allen talk in the plant's office.

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