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Bridges of Saint Petersburg Russia
They save natural water cycle between the Neva Bay and the Gulf of Finland. When the culverts need to be closed water gates submerge in the depth of 2.5 m.
Dams serve as the base of the FPFC and present stone earth embankments in the shape of a trapezoid. Dams restrain onset and also serve as the base of a six lane high speed motorway passing the crest o