Portable Hydraulic Dredging LLC (PHD) is a marine contractor specializing in portable cutterhead suction dredging in the Pacific Northwest. Our expert staff aims to provide the highest level of service to our clients.
About usWe operate the Renegade, a portable cutterhead suction dredge. The Renegade is approximately 80 feet long, with a ladder length of 42 feet, a draft of 3 to 5 feet and a 12 inch discharge.
Learn moreCutterhead suction dredging consists of agitating the sea floor via a rotating cutterhead. The material is then suctioned through the pipe as a slurry mixture (water/material mixture). The slurry then enters the floating section of the dredge where it passes through the pump and is discharged out the pipeline to the disposal area. Disposal areas vary depending on the project (in water disposal, upland fill, beach nourishment, etc). The dredge is held in place via an anchoring pole, which is called a spud, allowing the dredge to swing back and forth using anchors to dig the material.