Great Lakes are estimated at 900 trillion. The influx of parasitic lamprey populations after the development of the Erie Canal and the much later Welland Canal led to the two federal governments of the US and Canada working on joint proposals to control it. By the mid-1950s, the lake trout populations of Lakes Michigan and Huron were reduced, with the lamprey deemed largely to blame. This led to the launch of the bi-national Great Lakes Fishery Commission. "The Great Lakes: An Environmental Atlas and Resource Book" (1972) noted: "Only pockets remain of the once large commercial fishery." But, water quality improvements realized
Chenango Canal in a water highway to what would become the Midwestern United States, connecting to the Great Lakes at Buffalo. It connected the Great Lakes to the Hudson River and then to the port of New York City. The Erie made use of the favorable conditions of New York's unique topography which provided that area with the only break in the Appalachian range—allowing for east-west navigation from the Atlantic coast to the Great Lakes. The canal system gave New York State a competitive advantage, helped New York City develop as an international trade center, and allowed Buffalo to grow from just