Economical Trunk Sewer Incorporated into NCDOT Project

Having recently come to an agreement with the City of Jacksonville, NC to share the costs and ownership of Phase III of the Piney Green Sewer project, ONWASA determined that the NCDOT Piney Green road-widening project presented an opportunity to economically construct roughly 23,000 feet of trunk sewer along Piney Green Road as a part of the DOT project. The project required coordination with DOT construction and our team provided the preliminary engineering, design, permitting, easement surveys and acquisition and bidding services for ONWASA’s portion of the project. Design plans called for the installation of a combination of gravity sewer and force main as the project also prepared for future increased needs by setting up an initial duplex station with odor control that had the ability to expand from 1000 to 2100 gpm. After the design phase was completed, we performed construction contract administration and construction observation as the contractor utilized horizontal drilling to overcome several creeks. While the entire line, pump station and odor control project was designed by our teams, a portion of the line was constructed by the DOT as a part of U-3810 road widening, requiring that our construction observers worked together with NCDOT and that all work constructed by NCDOT was designed to their standards and bid as part of the U-3810 project.