A deepwater channel connects Galveston's harbor with the Gulf and the Gulf Intracoastal Waterway. British Waterways could also change the classification of an existing waterway. The Manasquan Inlet is the northern terminus of the inland portion of the Intracoastal Waterway. Pleasure Island now separates the city from the Gulf Intracoastal Waterway. The Intracoastal Waterway passes through the city. The nearby Hillsboro Inlet forms part of the Atlantic Intracoastal Waterway. The city is separated by the Intracoastal Waterway from Clearwater Beach. Bottlenose dolphin are commonly seen in the intercoastal waterway. The lakes form the Great Lakes Waterway. It is also located near the U.S. Intracoastal Waterway. The sound forms part of the Atlantic Intracoastal Waterway. A permanent building was constructed in 1924 in Flagler Park along the Intracoastal Waterway. The Volga itself is an important inland waterway. Both lakes are part of the Great Lakes Waterway. The canal is now the oldest operating artificial waterway in the country.