The Contract 825 for the design and construction of Millenia station and associated tunnels was awarded to Shanghai Tunnel Engineering Co. Pte Ltd and a joint venture with Woh Hup and NCC at a sum of S$343.94 million on 19 December 2001. In 2005, the station's name was finalised as Promenade, in light of its proximity to the Marina Promenade. During the station's construction, on 25 March 2003, a section of Rochor Road was realigned. The station was opened on 17 April 2010 along with the rest of Stages 1 and 2 of the Circle line. Subsequently, a two-station extension from Promenade to Marina Bay station was announced on 28 November 2011. On 14 January 2012, the Circle line Extension started operations.
Downtown line
On 14 June 2005, the Land Transport Authority announced the Downtown Extension to serve the New Downtown at Marina Bay area. On 27 April 2007, then Transport Minister Raymond Lim announced that the newly christened Downtown Line would be built in three stages stretching with 33 stations. The Contract C902 for the design and construction of the Downtown Line station and its adjacent tunnels was awarded to Shanghai Tunnel Engineering Co. Pte Ltd at a contract sum of $231.9 million on August 2008. Portions of Temasek Avenue were realigned during the construction period to allow work to be carried out. The DTL station opened on 22 December 2013 as part of Stage 1 of the Downtown Line.
Station details
Architecture
The station is designed by DP Architects. The station features a "curvilinear envelope with deep-edged metal louvres" to conceal the concrete service shafts and integrate with the vertically-glazed skylights. The three entrances to the station has identical features of thin and sharp lines for the roof and glazed panels for the sides. The interior feature a pattern of light grey and granite floors, with granite and stainless steel-trimmed panels on the walls and metal-grid ceilings.
Art in transit
Two artworks are featured at this station as part of the Art-in-Transit Programme. At the Circle line platforms, the artwork "Dreams in a Social Cosmic Odyssey" by PHUNK features huge metallic droplets suspended from the ceiling, to represent an "illuminated celebration of collective dreams". The droplets reflect the sunlight from above, creating a moving kaleidoscope on the station floors. These waves of light illustrate the "ebb and flow" commuter traffic and allows the interaction of passengers in transit with the art piece. At the Downtown line platforms, an artwork "Earthcake" by Ana Prvacki depicts the grounds of tiers of Singapore's geology, history, culture, growth and development. The artwork also bear similarity with one of colourful local kuehs, reflecting Singapore’s multi-cultural food to traditions.
