Duke Energy and the University of North Carolina-Chapel Hill have signed an agreement for a pilot project to install up to three offshore wind turbines in the state’s Pamlico Sound. Duke and UNC are completing the scoping document for the project, says Duke spokesman Tim Petit. After the scoping document is complete, Duke will issue a request for proposal for engineering and construction services. Turbines would be installed from eight to 10 miles offshore and would have a capacity of about 3.5 MW.