This project consists of the contractor removing the existing 12" VCP and connecting boxs and install 18" RCP with a 4' x 8' precast box and 3' x 4' precast box. 4' x 8' precast is connected to an existing 18" VCP by an 8' section of 18" RCP and pipe collar. Replace pavement with 12" PCCP (NRDJ).