Yellow -- Existing sand and mud bars that require removal;
Orange -- Sand and mud bars that have been removed;
Purple -- Sand and mud bars that are building from wind and currents along the beaches.
Note 1 -- The last report of the condition of the harbor of buffalo and the lower Niagra River have been sent to Congress for consideration of further work needed to remove all the above indicated material and the further slowly but surely material being moved into place by the natural wind and current drift.
Drawn and enhanced by Ian McKay, Captai, U.S. Corps of Topographical Engineers