Onslow Water and Sewer Authority
Piney Green Trunk Sewer Extensions
Having recently come to an agreement with the City of Jacksonville, NC to share costs and ownership of Phase III of the Piney Green Sewer project, and based on work performed by The Wooten Company in a previous contract, 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 would require coordination with DOT construction and The Wooten Company was selected to provide 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 5,900 LF of 18 inch gravity sewer, 4,300 LF of 24 inch gravity sewer, 3,400 LF of 8 inch force main, 4,300 LF of 12 inch force main and 5,800 LF of 14 inch force main. The project was also designed to prepare 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 by installing a third pump in the 12 foot diameter wetwell. Ultimately the project delivered wastewater to the Camp Lejeune Advanced Wastewater Treatment Plant for treatment via the Piney Green Sewer Force Main and Outfall and the existing Hunters Creek Pump Station and Force Main. After the design phase was completed, The Wooten Company performed construction contract administration and construction observation through the completion of the sewer lines. The process went as planned, utilizing horizontal drilling as the lines crossed Northeast Creek and Little Northeast Creek to overcome the obstacle.
While the entire line, pump station and odor control project was designed by The Wooten Company, a portion of the line was constructed by the DOT as a part of U-3810 road widening. All work constructed by NCDOT was designed to NCDOT standards and bid as part of the U-3810 project. Bid in September of 2012 at $4.12 million, this portion of construction is being administered by the DOT with supplemental observation by The Wooten Company. Work was completed in summer 2014. The remaining line work and pump station improvement was constructed under ONWASA contract and was bid at $1.28 million on February 7, 2013. Construction was completed in 2014.