OCEANPORT CREEK CROSSING
LOCATION: OCEANPORT, NJ
CLIENT: NEW JERSEY AMERICAN WATER
MARKET SECTOR: PUBLIC
THE OPPORTUNITY
New Jersey American Water (NJAW) owns, operates and maintains a few 36” transmission main aerial water crossings in Oceanport, New Jersey. An assessment of the existing timber pile bents and 36” cast iron water main (circa 1900), at Oceanport Creek, indicated the existing timber supports were in poor condition, and the pipe itself was at the end of it’s useful life (based on wall thickness measurements). PS&S was tasked to evaluate potential replacement options both replace-in-kind, trenchless technology installation and conventional direct bury.
THE CHALLENGE
The project location contained various challenges such as, limited utility space within the roadway, environmental permitting, constructability considerations and design of connections into existing water main(s); all of which were considered during the design phase. Proper restraint of both existing and new pipeline was another aspect that challenged PS&S to provide innovative design. Finally demolition and abandonment of the existing timber piles and existing cast iron pipe needed to meet County and environmental regulations.
THE PS&S SOLUTION
Following PS&S’s alternative’s analysis, NJAW selected the most appropriate design which consisted of 600 linear feet of horizontal directionally drilled (HDD) 36” HDPE water transmission main under Oceanport Creek to replace the existing aerial crossing. Detailed design services for the HDD were provided by PS&S, consisting of base mapping, hydrographic survey, geotechnical borings, and private bid ready design plans and specification preparation. Regulatory permits, such a CAFRA, Waterfront Development, and US Army Corps of Engineers, were secured.
RELATED PROJECTS
NJ WATER ASSOCIATION
TOWNSHIP OF MONTCLAIR
DISCIPLINE INVOLVED