Editing Circle MRT line (section)

==History==

===Original plans===
[[File:MRT Route Map MR.png|thumb|left|The Marina MRT line as announced in 1997; 18 stations were planned for the line.]]

The Circle Line dates back to 1989, when then-Minister for Communications and Information, [[Yeo Ning Hong]], stated that such a system would be "feasible when the population reaches four million", noting the slow population growth and demand.<ref>{{cite web |title=Circle line 'needed with 4 million people' |url=https://eresources.nlb.gov.sg/newspapers/Digitised/Article/straitstimes19891104-1.2.2 |website=The Straits Times (retrieved from NLB) |access-date=6 October 2019 |date=4 November 1989 |archive-url=https://web.archive.org/web/20191006170229/https://eresources.nlb.gov.sg/newspapers/Digitised/Article/straitstimes19891104-1.2.2 |archive-date=6 October 2019 |url-status=live }}</ref>

Feasibility studies for the proposed line commenced on 11 October 1994. The line, then named the Marina Line, was first announced on 16 October 1997. The line would serve Marina Centre and the new downtown at Marina South, with multiple branches to [[Chinatown MRT station|Chinatown]] and Dhoby Ghaut via the [[National Stadium, Singapore|National Stadium]] to either [[Kallang MRT station|Kallang]] or [[Paya Lebar MRT station|Paya Lebar]] stations. The line was planned to have 18 stations, with a possible extension to [[Tanjong Pagar MRT station|Tanjong Pagar]] station.<ref>{{Cite news |date=16 October 1997 |title=Plans for new Marina train line are rolling |work=The Business Times |quote=The proposed {{convert|12|km|miles|adj=on}} Marina line... is likely to start from [[Kallang MRT station]],... (joining) People's Park (Chinatown) station (and) there will be a branch running from Marina Centre to the [[Dhoby Ghaut MRT station]].}}</ref> Plans for the line were confirmed and approved by the government on 12 June 1998.<ref>{{cite web |title=Signing of E&M contracts ceremony |url=http://www.nas.gov.sg/archivesonline/data/pdfdoc/1998061201.htm |website=NAS |access-date=23 November 2019 |date=12 June 1998 |archive-url=https://web.archive.org/web/20200320004337/https://www.nas.gov.sg/archivesonline/data/pdfdoc/1998061201.htm |archive-date=20 March 2020 |url-status=live }}</ref> However, due to the high costs and lack of development in Marina South, the Chinatown branch was later removed in November 1999 and the line was reduced to 6 stations from the Dhoby Ghaut to [[Stadium MRT station|Stadium]] stations.<ref>{{cite news |title=6 stations |work=The New Paper |date=25 November 1999}}</ref><ref>{{cite news |title=6 stations for Marina line's first phase|work=The Straits Times |date=25 November 1999|page=3}}</ref><ref>{{cite news |title=Marina rail line to be scaled back |work=The Business Times |date=25 November 1999|page=3}}</ref> A part of the removed leg later became part of the [[Downtown MRT line|Downtown Line]].<ref>{{cite book|last1=Colin|first1=Cheong|title=The Circle Line, Linking All Lines|date=2012|isbn=978-981-4342-02-5|page=36|publisher=Land Transport Authority }}</ref> On the other hand, a further extension towards Upper Paya Lebar was announced on 28 April 2001.<ref>{{cite web |title=Circle Line and Kallang/Paya Lebar Expressway |url=https://www.nas.gov.sg/archivesonline/data/pdfdoc/2001042808.htm |website=NAS |access-date=23 November 2019 |date=28 April 2001 |archive-url=https://web.archive.org/web/20200306000711/https://www.nas.gov.sg/archivesonline/data/pdfdoc/2001042808.htm |archive-date=6 March 2020 |url-status=live }}</ref>

The Marina Line was eventually merged with a planned [[Light Rail Transit (Singapore)|Light Rail Transit]] line that went from Paya Lebar to [[Buona Vista MRT station|Buona Vista]] via [[Serangoon MRT station|Serangoon]] and [[Bishan MRT station|Bishan]] to form Circle Line Stage 3 on 20 January 2003,<ref>{{cite web |title=Circle Line Stage 3 |url=http://www.lta.gov.sg/Menu_NewsRelease.htm |archive-url=https://web.archive.org/web/20030526200150/http://www.lta.gov.sg/Menu_NewsRelease.htm |url-status=dead |archive-date=26 May 2003 |website=www.lta.gov.sg |access-date=15 July 2019 |date=20 January 2003}}</ref> and subsequently Circle Line Stage 4 and 5 on 12 December 2003 when Stage 4 was extended from Buona Vista to [[World Trade Centre, Singapore|World Trade Centre]] to close up the link and to provide connectivity from the west to Sentosa, becoming the Circle Line.<ref>{{cite web |title=Completing the Circle via Holland V |url=http://eresources.nlb.gov.sg/newspapers/Digitised/Article/today20031213-1.2.3 |website=Today (retrieved from NLB) |access-date=6 September 2019 |date=13 December 2003 |archive-url=https://web.archive.org/web/20190906173337/http://eresources.nlb.gov.sg/newspapers/Digitised/Article/today20031213-1.2.3 |archive-date=6 September 2019 |url-status=live }}</ref><ref>{{cite web |title=News 5 Tonight (12 December 2003) |url=http://www.nas.gov.sg/archivesonline/audiovisual_records/record-details/57de1bd1-1164-11e3-83d5-0050568939ad |website=MediaCorp (retrieved from NAS) |access-date=19 July 2019 |archive-url=https://web.archive.org/web/20190719031728/http://www.nas.gov.sg/archivesonline/audiovisual_records/record-details/57de1bd1-1164-11e3-83d5-0050568939ad |archive-date=19 July 2019 |url-status=live }}</ref> On 8 August 2001, [[SMRT Corporation|SMRT]] won the bid and was appointed the operator of the Circle Line.<ref>{{cite web |title=Appointment Of Operator For The Circle Line |url=http://app.internet.gov.sg/scripts/lta/3_press_content.asp?start=315 |archive-url=https://web.archive.org/web/20021224094604/http://app.internet.gov.sg/scripts/lta/3_press_content.asp?start=315 |url-status=dead |archive-date=24 December 2002 |website=www.lta.gov.sg |access-date=19 July 2019 |date=8 August 2001}}</ref> Names for the stations for the first three stages of the Circle Line were finalised in July 2005 after the [[Land Transport Authority]] (LTA) conducted a [[public consultation]] exercise on the naming of stations.<ref>{{Cite web|title=Annex A Finalised Names For Circle Line (CCL) Stages 1-3 Stations
|url=http://www.lta.gov.sg/images/Circle%20Line%20Station%20Names%20(Annex%20A).doc|website=www.lta.gov.sg|url-status=dead|archive-url=http://eresources.nlb.gov.sg/webarchives/wayback/20061218084252/http://www.lta.gov.sg/images/Circle%20Line%20Station%20Names%20(Annex%20A).doc|archive-date=18 December 2006}}</ref><ref>{{Cite web|url=http://www.mot.gov.sg/news-centre/news/Detail/Circle%20Line%20Station%20Names%20LTA%20Announces%20Finalised%20Names%20For%20Circle%20Line%20Stages%201-3%20Stations%20And%20Seeks%20Views%20On%20Names%20For%20Circle%20Line%20Stages%204%20And%205%20Stations/|title=Circle Line Station Names LTA Announces Finalised Names For Circle Line Stages 1-3 Stations And Seeks Views On Names For Circle Line Stages 4 And 5 Stations|website=www.mot.gov.sg|language=en|access-date=28 April 2020|archive-url=https://web.archive.org/web/20190129182134/https://www.mot.gov.sg/news-centre/news/Detail/Circle%20Line%20Station%20Names%20LTA%20Announces%20Finalised%20Names%20For%20Circle%20Line%20Stages%201-3%20Stations%20And%20Seeks%20Views%20On%20Names%20For%20Circle%20Line%20Stages%204%20And%205%20Stations/|archive-date=29 January 2019|url-status=live}}</ref> In November 2005, the names of the stations in Stages 4 and 5 were finalised.<ref>{{Cite web|title=Finalised Names For Circle Line (CCL) Stages 4&5 Stations|url=http://www.lta.gov.sg/images/Station%20names%20for%20CCL%20Stages%204%20&%205%20-%20Annex%20A.doc|website=www.lta.gov.sg|url-status=dead|archive-url=http://eresources.nlb.gov.sg/webarchives/wayback/20061218083514/http://www.lta.gov.sg/images/Station%20names%20for%20CCL%20Stages%204%20&%205%20-%20Annex%20A.doc|archive-date=18 December 2006}}</ref><ref>{{Cite web|title=Station Names For Circle Line Stages 4 And 5|url=http://app.lta.gov.sg/apps/news/page.aspx?c=2&id=1419|date=7 November 2005|website=www.lta.gov.sg|url-status=dead|archive-url=https://eresources.nlb.gov.sg/webarchives/2010-04-23%2022:03:36.000/wp/details/http://app.lta.gov.sg/corp_press_content.asp?start=1419|archive-date=23 April 2010}}</ref><ref>{{Cite web|url=http://www.mot.gov.sg/news-centre/news?q=Circle%20line&c=&a=&fm=&fy=&tm=&ty=&p=27|title=MOT Singapore – Gain new perspectives on land, sea & air transport|website=www.mot.gov.sg|language=en|access-date=28 April 2020|archive-date=25 July 2020|archive-url=https://web.archive.org/web/20200725141527/https://www.mot.gov.sg/news-centre/news?q=Circle%20line&c=&a=&fm=&fy=&tm=&ty=&p=27|url-status=live}}</ref>

===Construction of the initial stages===
[[File:Construction of Bishan MRT Circle Line 2005-03-29.JPG|thumb|left|The construction of Bishan station]]

Construction started on 13 March 2002 for Stage 1, 5 September 2002 for Stage 2, May 2003 for Stage 3, and January 2005 for Stages 4 and 5. Initially planned to be opened in stages from 2006 to 2010, at an estimated cost of S$6.7 billion, the [[Nicoll Highway collapse]] delayed the opening of the first stage to 2009. When the line fully opened on 8 October 2011, the cost of construction had risen to nearly S$10 billion.<ref name="auto">{{cite book|last1=Colin|first1=Cheong|title=The Circle Line, Linking All Lines|date=2012|isbn=978-981-4342-02-5|page=46|publisher=Land Transport Authority }}</ref><ref>{{cite web|url=http://motoring.asiaone.com/Motoring/Motorworld/Story/A1Story20090818-161682.html|title=Circle Line could cost taxpayers $10 billion|publisher=AsiaOne Motoring|access-date=21 August 2016|url-status=dead|archive-url=https://web.archive.org/web/20111008134221/http://motoring.asiaone.com/Motoring/Motorworld/Story/A1Story20090818-161682.html|archive-date=8 October 2011}}</ref> Due to the collapse, the station was relocated to a new site two-thirds the size of the original {{convert|100|m|ft}} away.<ref>[http://www.straitstimes.com/Free/Story/STIStory_157967.html "Circle line will exceed $6.7b budget"] {{Webarchive|url=https://web.archive.org/web/20071113174139/http://www.straitstimes.com/Free/Story/STIStory_157967.html |date=13 November 2007 }} Christopher Tan, [[The Straits Times]], 15 September 2007</ref> Three stations on the Circle Line were initially designed as 'shell stations', but the decision was made to open two of them, Caldecott and Haw Par Villa (previously Thomson and West Coast respectively), leaving [[Bukit Brown MRT station|Bukit Brown]] as the only unopened station on the line.<ref name="auto"/>

The first section of the line, Stage 3, a {{convert|5|km|mi}} five-station segment stretching from Bartley to Marymount, opened on 28 May 2009.<ref name="News">{{cite web | access-date=28 May 2009 | archive-date=28 May 2009 | archive-url=https://web.archive.org/web/20090528095244/http://www.channelnewsasia.com/stories/singaporelocalnews/view/432074/1/.html | url=http://www.channelnewsasia.com/stories/singaporelocalnews/view/432074/1/.html | title=Part of Circle Line opens today | publisher=ChannelNewsAsia | date=28 May 2009}}</ref><ref>{{cite web|url=http://www.lta.gov.sg/content/dam/ltaweb/corp/PublicTransport/files/Early-Opening-for-CCL-from-Bartley-to-Marymount.pdf|title=Early Opening for Circle Line from Bartley to Marymount|access-date=16 April 2009|website=www.lta.gov.sg|archive-url=http://eresources.nlb.gov.sg/webarchives/wayback/20130221220424/http://www.lta.gov.sg/content/dam/ltaweb/corp/PublicTransport/files/Early-Opening-for-CCL-from-Bartley-to-Marymount.pdf|archive-date=21 February 2013|url-status=dead}}</ref> Initial ridership on this section was lower than estimated, at 32,000 passengers per day (ppd) instead of the estimated 55,000 ppd.<ref>{{cite web|url=http://www.channelnewsasia.com/stories/singaporelocalnews/view/449350/1/.html|title=LTA completes final tunnelling work on Circle Line|publisher=Channel News Asia|date=17 August 2009|archive-url=https://web.archive.org/web/20121019161745/http://www.channelnewsasia.com/stories/singaporelocalnews/view/449350/1/.html|archive-date=19 October 2012}}</ref> Tunneling works for the entire line were completed on 17 August 2009.<ref>{{cite web|url=http://www.straitstimes.com/Breaking%2BNews/Singapore/Story/STIStory_417858.html?vgnmr=1|title=Circle Line: The longest dig|publisher=The Straits Times|date=17 August 2009|archive-url=https://web.archive.org/web/20090821173820/https://www.straitstimes.com/Breaking%2BNews/Singapore/Story/STIStory_417858.html?vgnmr=1|archive-date=21 August 2009}}</ref> Stages 1 and 2 started operations on 17 April 2010,<ref>{{Cite web|title=Welcome Remarks By Mr Raymond Lim At The Opening Of The Circle Line From Dhoby Ghaut To Bartley on 16 April 2010|url=http://www.mot.gov.sg/news-centre/news/Detail/Welcome%20Remarks%20By%20Mr%20Raymond%20Lim%20At%20The%20Opening%20Of%20The%20Circle%20Line%20(From%20Dhoby%20Ghaut%20To%20Bartley)%20on%2016%20April%202010/|website=www.mot.gov.sg|language=en|access-date=1 May 2020|archive-date=1 May 2020|archive-url=https://web.archive.org/web/20200501111454/https://www.mot.gov.sg/news-centre/news/Detail/Welcome%20Remarks%20By%20Mr%20Raymond%20Lim%20At%20The%20Opening%20Of%20The%20Circle%20Line%20(From%20Dhoby%20Ghaut%20To%20Bartley)%20on%2016%20April%202010/|url-status=dead}}</ref><ref>{{cite web |url=http://app.lta.gov.sg/corp_press_content.asp?start=kpt8zx9w8ik53wi33gr59p754348fsj35b9glldouy8ndlh7kb |title=Circle Line from Bartley to Dhoby Ghaut to Open 17 April |access-date=26 January 2010 |url-status=dead |archive-url=https://web.archive.org/web/20110621220756/http://app.lta.gov.sg/corp_press_content.asp?start=kpt8zx9w8ik53wi33gr59p754348fsj35b9glldouy8ndlh7kb |archive-date=21 June 2011|website=www.lta.gov.sg }}</ref> followed by Stages 4 and 5 (from the [[Marymount MRT station|Marymount]] to HarbourFront stations) on 8 October 2011.<ref>{{Cite web|title=Connect - October 2011|url=https://www.lta.gov.sg/content/dam/ltaweb/corp/PublicationsResearch/files/ReportNewsletter/Connect/connect_oct_2011.pdf|website=www.lta.gov.sg|url-status=dead|archive-url=http://eresources.nlb.gov.sg/webarchives/wayback/20180205094159/https://www.lta.gov.sg/content/dam/ltaweb/corp/PublicationsResearch/files/ReportNewsletter/Connect/connect_oct_2011.pdf|archive-date=5 February 2018}}</ref><ref>{{Cite web|title=Speech by Mr Tharman Shanmugaratnam at the Circle Line Opening Ceremony on 7 Oct 2011|url=http://www.mot.gov.sg/news-centre/news/Detail/Speech%20by%20Mr%20Tharman%20Shanmugaratnam%20at%20the%20Circle%20Line%20Opening%20Ceremony%20on%207%20Oct%202011/|website=www.mot.gov.sg|language=en|access-date=1 May 2020|archive-date=1 May 2020|archive-url=https://web.archive.org/web/20200501111937/https://www.mot.gov.sg/news-centre/news/Detail/Speech%20by%20Mr%20Tharman%20Shanmugaratnam%20at%20the%20Circle%20Line%20Opening%20Ceremony%20on%207%20Oct%202011/|url-status=live}}</ref><ref>{{Cite web|url=http://www.mot.gov.sg/news-centre/highlights/detail/circle-line-from-marymount-to-harbourfront-to-open|title=Circle Line from Marymount to HarbourFront to open|website=www.mot.gov.sg|language=en|access-date=28 April 2020|archive-date=19 November 2020|archive-url=https://web.archive.org/web/20201119125715/https://www.mot.gov.sg/news-centre/highlights/detail/circle-line-from-marymount-to-harbourfront-to-open|url-status=live}}</ref><ref>{{cite web|url=http://sg.news.yahoo.com/blogs/singaporescene/final-batch-circle-line-stations-open-004355257.html|title=Train crowding to ease with launch of full Circle line: Minister Lui|date=2 August 2011 |access-date=21 August 2016|archive-url=https://web.archive.org/web/20160413133839/https://sg.news.yahoo.com/blogs/singaporescene/final-batch-circle-line-stations-open-004355257.html|archive-date=13 April 2016|url-status=live}}</ref> A two-station extension to Marina Bay opened on 14 January 2012.<ref>{{Cite web|url=http://www.smrt.com.sg/Announcements/articleid/630|title=The extension on Circle Line opens with two events held concurrently at Bayfront Station and Esplanade Xchange|website=www.smrt.com.sg|access-date=22 April 2020|archive-url=https://web.archive.org/web/20200422010155/http://www.smrt.com.sg/Announcements/articleid/630|archive-date=22 April 2020|url-status=live}}</ref><ref>{{Cite web|url=http://www.mot.gov.sg/news-centre/news/Detail/Speech%20by%20Mr%20Lui%20Tuck%20Yew%20at%20the%20Opening%20Ceremony%20of%20the%20Circle%20Line%20Extension%20on%2013%20January%202012/|title=Speech by Mr Lui Tuck Yew at the Opening Ceremony of the Circle Line Extension on 13 January 2012|website=www.mot.gov.sg|language=en|access-date=21 April 2020|archive-date=4 September 2020|archive-url=https://web.archive.org/web/20200904091109/https://www.mot.gov.sg/news-centre/news/Detail/Speech%20by%20Mr%20Lui%20Tuck%20Yew%20at%20the%20Opening%20Ceremony%20of%20the%20Circle%20Line%20Extension%20on%2013%20January%202012/|url-status=live}}</ref><ref>{{Cite web|url=http://www.mot.gov.sg/news-centre/highlights/detail/circle-line-and-tuas-west-extension-updates|title=Circle Line and Tuas West Extension updates|website=www.mot.gov.sg|language=en|access-date=21 April 2020|archive-date=3 September 2020|archive-url=https://web.archive.org/web/20200903130555/https://www.mot.gov.sg/news-centre/highlights/detail/circle-line-and-tuas-west-extension-updates|url-status=live}}</ref><ref>{{Cite web|url=http://www.mot.gov.sg/news-centre/news/Detail/Speech%20by%20Mr%20Lui%20Tuck%20Yew%20at%20the%20Downtown%20Line%203%20Groundbreaking%20Ceremony/|title=Speech by Mr Lui Tuck Yew at the Downtown Line 3 Groundbreaking Ceremony|website=www.mot.gov.sg|language=en|access-date=28 April 2020}}{{Dead link|date=May 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
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===Circle Line stage 6===
On 17 January 2013, then-Minister for Transport, [[Lui Tuck Yew]], announced Circle Line Stage 6 which would "close the circle", set to be completed by 2025.<ref>{{Cite web |title=Factsheet: Completion of Circle Line 6 Tunnelling Works |url=https://www.lta.gov.sg/content/ltagov/en/newsroom/2022/1/news-releases/Completion_CCL6_tunnelling_works.html |url-status=live |archive-url=https://web.archive.org/web/20220112050732/https://www.lta.gov.sg/content/ltagov/en/newsroom/2022/1/news-releases/Completion_CCL6_tunnelling_works.html |archive-date=12 January 2022 |access-date= }}</ref> The 4&nbsp;km extension will run between [[Marina Bay MRT station|Marina Bay]] and [[HarbourFront MRT station|HarbourFront]].<ref>{{cite web |url=https://www.mot.gov.sg/news-centre/news/Detail/Speech%20by%20Mr%20Lui%20Tuck%20Yew%20at%20visit%20to%20DTL1%20Chinatown%20Station%20on%2017%20January%202013/ |title=Speech by Mr Lui Tuck Yew at visit to DTL1 Chinatown Station on 17 January 2013 |website=MOT |access-date=19 September 2019 |date=17 January 2013 |archive-url=https://web.archive.org/web/20200226205104/https://www.mot.gov.sg/news-centre/news/Detail/Speech%20by%20Mr%20Lui%20Tuck%20Yew%20at%20visit%20to%20DTL1%20Chinatown%20Station%20on%2017%20January%202013/ |archive-date=26 February 2020 |url-status=live }}</ref><ref>{{cite web|url=http://www.lta.gov.sg/content/ltaweb/en/public-transport/projects/circle-line-6.html|title=Circle line 6 - Projects - Public Transport - Land Transport Authority|access-date=21 August 2016|archive-url=https://web.archive.org/web/20160105072640/http://www.lta.gov.sg/content/ltaweb/en/public-transport/projects/circle-line-6.html|archive-date=5 January 2016|url-status=live}}</ref> The extension will connect commuters between the HarbourFront to Marina Bay stations and expand the rail network to the southern edge of the Central Business District. On 29 October 2015, LTA announced the station locations for Stage 6, with the working names of the stations being [[Keppel MRT station|Keppel]], [[Cantonment MRT station|Cantonment]], and [[Prince Edward Road MRT station|Prince Edward]]. Tenders were called for construction between 2016 and 2017.<ref>{{Cite web|url=https://www.lta.gov.sg/apps/tender/default.aspx?scr=yes&Ref=882&scrdate=&fromdate=&todate=&keyword=keppel|title=Tender information {{!}} Land Transport Authority|website=www.lta.gov.sg|language=en|access-date=23 April 2017|archive-url=https://web.archive.org/web/20170424002657/https://www.lta.gov.sg/apps/tender/default.aspx?scr=yes&Ref=882&scrdate=&fromdate=&todate=&keyword=keppel|archive-date=24 April 2017|url-status=live}}</ref><ref>{{Cite web|url=https://www.lta.gov.sg/apps/tender/default.aspx?scr=yes&Ref=&scrdate=&fromdate=&todate=&keyword=cantonment|title=Tender information {{!}} Land Transport Authority|website=www.lta.gov.sg|language=en|access-date=23 April 2017|archive-url=https://web.archive.org/web/20170424085416/https://www.lta.gov.sg/apps/tender/default.aspx?scr=yes&Ref=&scrdate=&fromdate=&todate=&keyword=cantonment|archive-date=24 April 2017|url-status=live}}</ref><ref>{{Cite web|url=https://www.lta.gov.sg/apps/tender/default.aspx?scr=yes&Ref=&scrdate=&fromdate=&todate=&keyword=prince|title=Tender information {{!}} Land Transport Authority|website=www.lta.gov.sg|language=en|access-date=23 April 2017|archive-url=https://web.archive.org/web/20170424002406/https://www.lta.gov.sg/apps/tender/default.aspx?scr=yes&Ref=&scrdate=&fromdate=&todate=&keyword=prince|archive-date=24 April 2017|url-status=live}}</ref>

On 15 May 2017, the LTA invited the public to send in suggestions for names of the three MRT stations or propose to keep their current names.<ref>{{Cite web|url=https://www.lta.gov.sg/apps/news/page.aspx?c=2&id=5cf30fa9-12bd-463d-a481-120c410dcb99|title=LTA Invites Public to Suggest MRT station Names for Circle line 6 stations {{!}} Press Room {{!}} Land Transport Authority|website=www.lta.gov.sg|language=en|access-date=18 September 2017|archive-url=https://web.archive.org/web/20170918201927/https://www.lta.gov.sg/apps/news/page.aspx?c=2&id=5cf30fa9-12bd-463d-a481-120c410dcb99|archive-date=18 September 2017|url-status=live}}</ref><ref>{{cite web| url=http://www.channelnewsasia.com/news/singapore/wanted-names-for-3-new-circle-line-stations-8847558| website=Channel NewsAsia| access-date=15 May 2017| title=Wanted: Names for 3 new Circle line stations| date=15 May 2017| archive-url=https://web.archive.org/web/20170516182519/http://www.channelnewsasia.com/news/singapore/wanted-names-for-3-new-circle-line-stations-8847558| archive-date=16 May 2017| url-status=live}}</ref> The Keppel and Cantonment stations kept their names, while Prince Edward station was changed to Prince Edward Road station.<ref>{{Cite news|url=https://www.straitstimes.com/singapore/transport/excavation-for-circle-line-6-to-start-in-middle-of-next-year|title=Excavation for Circle Line 6 to start in middle of next year|date=28 September 2018|work=The Straits Times|access-date=13 October 2018|language=en|archive-url=https://web.archive.org/web/20181013211735/https://www.straitstimes.com/singapore/transport/excavation-for-circle-line-6-to-start-in-middle-of-next-year|archive-date=13 October 2018|url-status=live}}</ref>

Construction of Stage 6 commenced in late 2017. A [[joint venture]] – by [[China State Construction Engineering]] (The Singapore branch) and Nishimatsu Construction – won the contract to build the new Keppel station and its associated tunnels.<ref>{{Cite web|url=http://www.channelnewsasia.com/news/singapore/first-circle-line-6-contracts-worth-s-1-75b-awarded-by-lta-9198368|title=First CCL6 contracts awarded by LTA|publisher=ChannelNewsAsia|access-date=12 October 2017|archive-url=https://web.archive.org/web/20171012150146/http://www.channelnewsasia.com/news/singapore/first-circle-line-6-contracts-worth-s-1-75b-awarded-by-lta-9198368|archive-date=12 October 2017|url-status=live}}</ref><ref>{{Cite web|url=http://www.straitstimes.com/singapore/construction-of-circle-line-6-to-start-by-end-of-2017-first-three-civil-contracts-awarded|title=Construction of Circle line 6 to start by end of 2017, first three civil contracts awarded|date=8 September 2017|publisher=[[The Straits Times]]|access-date=12 October 2017|archive-url=https://web.archive.org/web/20171012100436/http://www.straitstimes.com/singapore/construction-of-circle-line-6-to-start-by-end-of-2017-first-three-civil-contracts-awarded|archive-date=12 October 2017|url-status=live}}</ref>

Stage 6 of the line is now expected to be completed by 2026 instead due to delays caused by the [[COVID-19 pandemic in Singapore|COVID-19 pandemic]].<ref>{{Cite web|title=Speech by Minister For Transport Mr Ong Ye Kung at MOT Committee of Supply Debate 2021 on A Tale of Three Connections|url=http://www.mot.gov.sg/news-centre/news/Detail/speech-by-minister-for-transport-mr-ong-ye-kung-at-mot-committee-of-supply-debate-2021-on-a-tale-of-three-connections/|access-date=2021-03-08|website=www.mot.gov.sg|language=en|archive-date=14 April 2021|archive-url=https://web.archive.org/web/20210414222045/https://www.mot.gov.sg/news-centre/news/Detail/speech-by-minister-for-transport-mr-ong-ye-kung-at-mot-committee-of-supply-debate-2021-on-a-tale-of-three-connections/|url-status=live}}</ref> Tunnelling works for the CCL6 were completed on 12 January 2022, with a final tunnel breakthrough from Prince Edward Road station into Cantonment station.<ref name="Auto 2022">{{cite web | last=Tan | first=Christopher | title=Tunnelling works for Circle Line MRT extension completed | website=The Straits Times | date=12 January 2022 | url=https://www.straitstimes.com/singapore/transport/tunnelling-works-for-circle-line-mrt-extension-completed | access-date=12 January 2022 | archive-date=12 January 2022 | archive-url=https://web.archive.org/web/20220112025858/https://www.straitstimes.com/singapore/transport/tunnelling-works-for-circle-line-mrt-extension-completed | url-status=live }}</ref> The tunnels between Cantonment station and the adjacent Prince Edward Road station were constructed only {{convert|6.7|m|ft}} below the former [[Tanjong Pagar railway station|Tanjong Pagar Railway Station]]. Prior to the tunnelling works, an extensive survey was conducted to ensure that the tunnels do not cross through the building's foundations. Structures were erected to protect the railway station's facade and interior, and monitoring instruments were installed to watch out for any building settlement.<ref name="CNA 2022">{{cite web | title=Circle Line 6 tunnelling works complete, 3 new stations set to open in 2026 | website=CNA | date=12 January 2022 | url=https://www.channelnewsasia.com/singapore/circle-line-6-extension-tunnelling-complete-keppel-cantonment-prince-edward-road-2429691 | access-date=12 January 2022 | archive-date=12 January 2022 | archive-url=https://web.archive.org/web/20220112053403/https://www.channelnewsasia.com/singapore/circle-line-6-extension-tunnelling-complete-keppel-cantonment-prince-edward-road-2429691 | url-status=live }}</ref> To construct the tunnels to Keppel station, the Keppel viaduct had to be closely monitored while underpinning the viaduct with new micro piles. Three bored piles were removed for the tunnelling works.<ref name="LTA 2022">{{cite web | title=Factsheet: Completion of Circle Line 6 Tunnelling Works | website=LTA | date=12 January 2022 | url=https://www.lta.gov.sg/content/ltagov/en/newsroom/2022/1/news-releases/Completion_CCL6_tunnelling_works.html | access-date=12 January 2022 | archive-date=12 January 2022 | archive-url=https://web.archive.org/web/20220112050732/https://www.lta.gov.sg/content/ltagov/en/newsroom/2022/1/news-releases/Completion_CCL6_tunnelling_works.html | url-status=live }}</ref>

On 6 December 2024, it was announced that Stage 6 will commence operation in the first half of 2026. During peak hours, trains will no longer terminate at either Pasir Panjang or Paya Lebar except for withdrawal trains; instead it will run from Dhoby Ghaut to Prince Edward Road. During off-peak hours, trains will only run up to Stadium, and the full loop will run all day (known as clockwise loop or counter-clockwise loop).<ref>{{Cite news |last=Kok |first=Yufeng |date=6 December 2024 |title=Hume MRT station to open in Q2 2025; Circle Line Stage 6 to be ready in first half of 2026 |url=https://www.straitstimes.com/singapore/transport/hume-mrt-station-to-open-in-q2-2025-circle-line-stage-6-to-be-completed-in-first-half-of-2026-chee |access-date=6 December 2024 |work=[[The Straits Times]] |archive-date=6 December 2024 |archive-url=https://web.archive.org/web/20241206111213/https://www.straitstimes.com/singapore/transport/hume-mrt-station-to-open-in-q2-2025-circle-line-stage-6-to-be-completed-in-first-half-of-2026-chee |url-status=live }}</ref>