Work on a $500,000 sewer rehabilitation project in Cape Henlopen State Park is nearing completion. Contractor A.P. Croll is replacing manhole covers and replacing and repairing sewer lines as well as replacing some line sections that were encased in concrete. Other sections of sewer line are being coated to extend their service without actual removal or replacement. The project began in late November and is expected to be finished by the end of March.