| Arc Surveying & Mapping, Inc. performed bathymetric multibeam swath sonar survey, side-scan sonar survey, magnetometer survey, sub-bottom survey, terrestrial optical laser scanning of project waterfront. This survey, performed during August 2012 provided Kokosing Construction with survey data that covered every aspect of the conditions to be encountered from buried stumps and metal to objects lying on the seafloor such as tires, trees, sunken vessels, etc. In addition, the terrestrial laser scanning of the shoreline provided a pre-dredge condition of existing docks, bulkheads, seawalls, etc. Contaminated sediment quantities were calculated for payment responsibility of each water front corporation, separated from the US government federal channel responsibility.
Arc Surveying & Mapping, Inc. performed a topographic scan survey of the existing confined disposal area.