Simulation of Sediment Transport and Deposition from Cable Burial Operations for the Alternative Site of the Cape Wind Energy Project

Cape Wind Associates, LLC
Applied Science Associates, Inc. (ASA)

The report estimated the resulting suspended sediment and deposition from the cable burial process for the cables connecting the wind turbine facilities to the electric service platform at the alternative site, 9 km (5.6 mi) southwest of Tucknernuck Island. The study used two models: HYDROMAP to calculate currents, and SSFATE to calculate suspended sediments in the water column and bottom deposition resulting from jetting operations. Small deposition thicknesses of 1 to 5 mm (0.04 to 0.2 in) occurred within a few hundred meters (yards) of the cable route with larger thicknesses up 20 mm (0.8 in) adjacent to the route. Water column concentrations were restricted to the bottom layer and typically lasted for a few hours before returning to ambient conditions. The SSFATE results for the alternative site were similar to that for the primary site at Horseshoe Shoal.

Publication Date: 
Friday, August 18, 2006
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