EAST CHICAGO — A flash explosion at T.A.C. East, Inc. Wednesday morning sent a large plume of black smoke into the air. Chief Anthony Serna said fire crews arrived on scene at 2000 E.

Ozinga broke ground on an East Chicago plant that's being billed as North America’s largest low-carbon cement mill.

Equipped with what's planned to be North America’s largest vertical roller mills, the plant is designed to produce one million tons of low-carbon cementitious materials annually.

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