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
Wednesbury Old Canal Wednesbury Old Canal Wednesbury Old Canal is part of the Birmingham Canal Navigations (BCN) in West Midlands (county), England. It opened in 1769, and although parts of it were abandoned in 1955 and 1960, the section between Pudding Green Junction and Ryder's Green Junction is navigable, as it provides a link to the Walsall Canal, while a short stub beyond Ryder's Green Junction is also navigable. Wednesbury Old Canal leaves the main line Birmingham level at Pudding Green Junction and passes through a completely industrial landscape. At Ryders Green Junction the Walsall Canal begins its descent down the eight Ryder's