Kerkstra Precast | Grandville, MI – Kerkstra began as Kerkstra Septic Tank Co. in 1962 with three employees. In 1975, it acquired precast forms and began producing manholes, septic tanks, Quadrozzi Concrete and catch banks for sewer contractors. Along with its Grandville headquarters, Kerkstra operates a plant in Jenison, Mich., it has owned since 1978. Today, Kerkstra produces solid and insulated sandwich wall panels, hollow-core and solid floor plank, balconies, beams, columns, truss systems, highway sound walls and median barriers, along with concrete products for the sewer industry. www.kerkstra.com
