million square metres of gross floor area and free up space which should be used for building chiller plants and cooling towers for separate buildings. The second district cooling plant started operations on 3 March 2016. Water management In 2004, the Public Utilities Board announced plans to construct a new downtown reservoir by damming the Marina Channel. This barrage was completed in 2008. Known as the Marina Barrage, it turned Marina Bay and the Kallang Basin into a confined freshwater reservoir with limited access to marine transportation to regulate the water quality. The new reservoir provides another source of drinking water for Singapore, as well as a stable water level for a variety of water activities and events. The barrage also prevents flooding in the Chinatown area. Transport There are currently eight rail stations: City Hall, Raffles Place, Marina Bay, Bayfront, Downtown, Telok Ayer, Esplanade and Promenade serving Marina Bay. As the plan set out, by 2020, the 360 hectares of Marina Bay boasts a comprehensive transport network as Singapore's most rail-connected district. The first three new MRT lines (Circle line, Downtown line) opened between 2012 and 2013. By 2018, the Marina Bay district had more than six MRT stations, all no more than five minutes of each other. The Thomson–East Coast MRT line created better connections within Marina South, opened in 2022. A pedestrian network links developments and MRT stations. Within greater Marina Bay, water taxis will even double up as an alternative mode of transport. Key developments In Marina Bay ArtScience Museum Asia Square Bayfront Bridge Circle line Clifford Pier Common Services Tunnel Conrad Centennial Singapore Downtown line Esplanade – Theatres on the Bay F1 Pit Building Gardens by the Bay Marina Bay Street Circuit The Fullerton Heritage Precinct: Customs House, The Fullerton Hotel Singapore, The Fullerton Waterboat House, One Fullerton, Fullerton Bay Hotel The Helix Bridge Marina Barrage Marina Bay Cruise Centre Singapore Marina Bay Financial Centre Marina Bay Golf Course Marina Bay Link Mall Marina Bay MRT station Marina Bay Sands Marina Bay Suites Marina Coastal Expressway Marina South Pier Marina South Pier MRT station Marina Square Millenia Walk North South line One Marina Boulevard One Raffles Quay One Shenton Way OUE Bayfront Singapore Flyer Suntec City The Float @ Marina Bay The Lawn @ Marina Bay The Promontory @ Marina Bay (formerly Central Promontory Site) The Sail @ Marina Bay Thomson–East Coast line Youth Olympic