New Jersey Borrow Area Vibracores Subsurface Investigation

Princeton Hydro was contracted by the United States Army Corps of Engineers (USACE) Philadelphia District to perform laboratory testing on vibracore samples collected as part of the State wide beach replenishment project. Vibracore samples were collected by the USACE Wilmington District vessel, Brandy Station, at existing and potential borrow areas located offshore near Cape May, Hereford to Townsends Inlet, Absecon Inlet, Long Beach Island, and Manasquan to Barnegat Inlet. Seventy-nine (79) total vibracore samples were collected, each extending approximately twenty (20) feet below the mudline at each location.

Following the completion of the field investigation, the samples were collected directly from the Government vessel and delivered to Princeton Hydro’s AASHTO accredited and USACE validated soils laboratory for logging and materials testing. From the vibracores, a total of four-hundred and fifty (450) samples were selected for grain size analysis.

A summary report was provided to USACE upon completion of the laboratory testing detailing the methodologies used for laboratory testing, results of the grain size analysis, detailed vibracore logs, and a summary of the soils observed in each of the retrieved vibracore samples.