Mark J. Kaiser and Brian F. Snyder – Ships and Offshore Structures, February 2014
Decommissioning requirements for offshore renewable energy facilities in US federal waters requires that all facilities be removed and the seafloor be cleared of all obstructions at the end of the life of the lease. Before construction activities are permitted, developers are required to post a bond based on the estimated cost of decommissioning to ensure that the federal government is protected in case of company default. The purpose of this note is to provide weight algorithms of offshore wind farm components to estimate the lift requirements in decommissioning, the scrap value of material, and disposal cost. Weight algorithms are calibrated and compared with North Sea project data and examples illustrate the procedures. The component weights at the Cape Wind farm offshore Massachusetts are estimated.