1. No 22. Delaware River at Cherry Island Flats showing the changes in depth between 1841 and 1881 Yale Public content 1884. 2013-10-15T19:13:09Z. 2018-12-10T20:22:35Z. U.S. Coast and Geodetic Survey. U.S. Coast and Geodetic Survey. English. cartographic image. Public. Delaware River (N.Y.-Del. and N.J.).