Kuhlman Corporation operates several related businesses in Northern Ohio and Southeast Michigan: ready-mixed concrete manufac ... turing and delivery; a building materials supply house specializing in products for the concrete/masonry and water/sewer trades; sand and gravel sales and transportation; and water-oriented bulk materials handling. Kuhlman Corporation remains a family-owned and operated business — now in its fifth generation, headquartered in Maumee, Ohio. read more