PARRIS ISLAND FORCE MAIN PROJECT CREATES RECORD HDD INSTALLATION FOR PLASTIC PIPE

摘要

In September 2008, the Beaufort-Jasper Water and Sewer Authority (BJWSA) assumed ownership, operation, and maintenance responsibility for the water and wastewater systems at several local military facilities, including the Marine Corps Recruit Depot at Parris Island, SC. Due to the restrictive Beaufort River discharge requirements, the military wastewater plants at the Air Station and Parris Island needed to be eliminated and flows diverted to BJWSA's state-of-the-art Port Royal Island, SC Water Reclamation Facility. This operational change required the waste stream at Parris Island to be piped off of the island. But with extensive tidal marshland, and other traditional construction constraints present, the new sewer force main from Parris Island had to be installed under Archer's Creek and the surrounding marsh via Horizontal Directional Drilling (HDD) methodology. Open cutting across the salt marsh would have been very difficult, even had it been possible to permit. BJWSA's growing body of experience with long HDD installations and recent advances with the technology made drilling the only viable option. The Mears Group mobilized in October, 2009 and began the pilot bore. On December 2,2009,6,400 linear feet of fused 16" DR 18 FPVC® pipe was positioned on rollers and pulled into place to complete the crossing. This paper will discuss all aspects of this 6,400 LF record breaking crossing, including the bore completion, staging and inserting that length of pipe, and working within the requirements of the military base, which made this project even more challenging.