Hudson River Estuarine Research Reserve System as the Hudson River National Estuarine Research Reserve. The Hudson River is navigable by large steamers up to Troy, and by ocean-faring vessels to the Port of Albany. The original Erie Canal, opened in 1825 to connect the Hudson with Lake Erie, emptied into the Hudson at the Albany Basin, just south of the Federal Dam in Troy (at mile 134). The canal enabled shipping between cities on the Great Lakes and Europe via the Atlantic Ocean. The New York State Canal System, the successor to the Erie Canal, runs into the Hudson River north of
Teltow Canal Berlin's eastern suburbs. The Dahme provides a link to the Oder-Spree Canal, and hence to the River Oder and Poland. Whilst the Dahme is a tributary of the River Spree, itself a navigable tributary of the Havel, the Teltow Canal offers the advantage of bypassing the centre of Berlin, with its heavy river traffic. At its western end, the Teltow Canal incorporates the Griebnitzsee lake which links to the Havel in Potsdam. The Griebnitz Canal provides a second link to the Havel from the eastern end of the Griebnitzsee. Towards its eastern end, the Teltow Canal is linked to the