One big truck

This photo provided by Westech shows a truck with Westech’s Flow Control Body holding 447 tons of coal.

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This undated photo provided by Westech shows a truck with Westech’s Flow Control Body holding 447 tons of coal at Peabody Energy’s North Antelope Rochelle coal mine, north of Douglas, Wyo.

Guiness World Records recently awarded the body’s manufacturer, Mills-based Westech, a certificate for its custom-built unit designed for a Wyoming mine.