Location: Portsmouth, NH
This challenging project was completed in 45 days, utilizing the computer controlled guidance systems of the hydraulic backhoe excavator dredge, the A.J. Fournier, equipped with computer guidance excavation control. A dredge volume of ~30,000 yd^3 of material was removed within an active naval facility, to depths of 41 feet MLW. Dredge and barge transportation was conducted through the extreme currents of the Piscataqua River, requiring careful planning of the work around the tides. This project required upland disposal to an onsite containment facility.