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EDWARDSVILLE, ILL. — Contegra Construction Co. is underway on Gateway Commerce Center in Edwardsville near St. Louis. The 800,000-square-foot speculative distribution center is slated for completion this fall. EQT Exeter is the developer. Upon completion, the project will feature 146 dock doors, four drive-through doors, 3,000 square feet of office space, a specialized HVAC system and parking for 206 trucks and 538 cars.