Often at jobs, we are asked to remove what is already in place an replace it with updated and/or fresh material. Such was the case with the Underwater Engineering Services Inc. in St. Lucie. Here, we dredged contaminated areas and excavated a bench in the existing levees. We removed riprap and excavated a subsurface drainage layer in preparation of slopes according to the lines and grades set in the plans and specifications. Two thirds of this slope were underwater a canal bottom 40 feet wide and over 25 feet deep. We were successful with the use of our recently acquired iconic long reach excavators equipped with GPA systems to accomplish our job within a six-tenth of a foot tolerance.