Sir Alexander Richardson Binnie (1839–1917) was a British civil engineer responsible for several major engineering projects, including several associated with crossings of the River Thames in London.As chief engineer for the London County Council, his design feats included the first Blackwall Tunnel (1897) and Greenwich foot tunnel (1902) (both in Greenwich, London) and, further upstream, Vauxhall Bridge (1906).By then knighted by Queen Victoria for services to engineering, he was elected President of the Institution of Civil Engineers in 1905.He also designed, with Sir Benjamin Baker, major parts of London's drainage system, including east London sewage treatment works at Crossness and Barking on the south and north sides of the Thames respectively (these were sited at the ends of the sewer outfalls created by Sir Joseph Bazalgette during the late 19th century).