The pontoon was designed to provide access and support to an 85m long connecting bridge situated on the south bank of the Thames.  The £2m jetty acted as a vital transport link to the Millennium Dome, accommodating an estimated one million riverboat passengers visiting the Millennium Experience.  The pontoon was 90m long and was constructed using an innovative technique utilising large diameter circular steel hollow sections weighing 450 tonnes.  The steel tubes were designed to be capable of providing the required buoyancy whilst resisting a complex series of load combinations resulting from dead, live and wave loading.  The design stage was carried out using a fast track approach in order to ensure that the construction stage was completed to the tight deadline specified.