Neglinnaya River
In 1966, the city built a second arm for the Neglinnaya River (length: 1 km, width: 4 m), cutting the path under Zaryadye. In 1974–1989, after the 1973 flood, the city built a completely-new 4 km tunnel, 3.47 m high and 4.90 m wide, from Durova Street to Metropol Hotel (where the tunnel forks into two branches). The old tunnel was reused as a pipe and cable conduit.