There are today eight road and three rail bridges on this section of the river, including those at Putney and Westminster. Several of the present road bridges are 19th century replacements of the initial 18th century structures which themselves often replaced ferry services which were quite often seriously dangerous. The major rail bridge is the Grosvenor bridge carrying lines from Victoria station. This bridge and the station were built by the London Brighton and South Coast Railway Company which seized an opportunity presented by the legislation that was brought in at the middle of the 19th century to combat water-borne disease. Particularly in the downstream part of this section of the river, the land on the south bank was very marshy. Development of this land went hand-in-hand with the building of the bridges and these developments were a significant part of the 19th century expansion of the metropolis. There are no road tunnels and only the one tunnel for the underground system. There may be other tunnels. There is no relevant public information, but a meeting of two mines does seem likely to have resulted from the efforts of the less loyal staff of the government organisations on the riverside at Vauxhall and Millbank.