None supplied. From introduction: Vertically rotating screens are utilized in power plant screenwells for removal of trash from the cooling water upstream of the circulating pumps. Fish in the screenwell will eventually impinge on the screens and get washed off with the trash. A full scale screenwell model was built and operated by Alden Research Laboratories so that Stone and Webster could test the feasibility of such a scheme with fish. Detailed hydraulic testing had not yet been initiated and results of fish testing are discussed in the main body of the report.