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D & R Hydrographic Survey and Design

Anchor QEA, LLC - D & R Canal, DE


CLE Engineering, Inc. provided engineering and design services for the proposed dredging project to recover lost drinking water storage capacity within the D&R canal. The project consists of the hydrographic surveys and sediment sampling along ten miles of the canal located in North Central, New Jersey.  Surveys were performed under difficult conditions caused by environmental concerns, very shallow bottom, and loss of GPS coverage.  All work was performed with the strictest scrutiny to prevent pollutants from entering the water body which is used as a public drinking water supply.

CLE devised a method of surveying which did not require the use of gas powered outboard motors, but still allowed for completion of the job on time and within the budget.  Multiple methods of surveying were employed to maximize survey coverage including; single beam surveys, manual soundings, and land based survey locations.  In addition to the survey component, CLE provided sediment sampling at intervals along the canal which were then utilized to determine dredging methodology.  CLE staff incorporated the findings of the field surveys into a planning level design.