Neva Bay
Because of this bridge, the maximum size of vessels capable of passing along the Neva from Lake Ladoga to the Neva Bay or in the opposite direction was reduced in height by 10 m. The minimum under-bridge dimension of bridges across the Neva (and the main navigable arm, the Bolshaya Neva) was 40 m, determined by the lowest bridges in the extended position (Volodarsky, Kuzminsky and Ladoga bridges) but Bolshoy Obukhovsky made it 10 m lower - only 30 m high.