A precast concrete plant operated by Garden State Precast is a Top 25 Plant certified by the National Precast Concrete Association. The Wall, NJ plant was honored Thursday, May 20, at the NPCA’s The Precast Show in New Orleans, La. Garden State Precast’s plant produces precast concrete box culverts, retaining walls, storm and sanitary products, and much more! To earn Top 25 recognition, a precast concrete plant must place among the highest scores in the annual NPCA Plant Cert