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The shore and nearshore area of Maumee Bay, at the western end of Lake Erie, was studied in detail to document the role of water levels on shore and lakebed erosion. Maumee Bay is bordered by a low escarpment composed of sand-poor glacial lacustrine silt and clay. Three regimes of lake level occurred during this nine-year study, each reflected by a change in the character and rate of erosion. During stable lake levels the erosion occurred as bank and shore recession and also as nearshore lakebed downcutting. During rising/high lake levels, bank and shore recession continued, but nearshore downcutting slowed except at the transgressed shoreline. During falling levels, bank recession ceased, the shoreline moved lakeward due to the falling levels, and nearshore downcutting resumed. Over the nine years of this study, total bank recession averaged about 20 m and nearshore downcutting averaged about 0.5 m. The hypothesis that a lower lake level stops erosion turns out to be false in this area because erosion of the lakebed continues to deepen the nearshore; therefore, when higher lake levels return, waves have an even greater impact on the bank. INDEX WORDS: Lake Erie, erosion, water levels, downcutting, nearshore processes

Shore and lakebed erosion; response to changing levels of Lake Erie at Maumee Bay State Park, Ohio