Line 4 (Mumbai Metro)

In June 2015, the Mumbai Metropolitan Region Development Authority (MMRDA) proposed building a {{Cvt|32|km|2}} Wadala-Thane-Kasarvadavali metro line as part of a plan to build six new metro lines at a total estimated cost of {{INRConvert|64000|c}}.{{Cite web |date=2015-06-16 |title=Over 130 km of Metro lines to criss-cross city by 2020 |url=https://indianexpress.com/article/cities/mumbai/over-130-km-of-metro-lines-to-criss-cross-city-by-2020/ |access-date=2023-07-09 |website=The Indian Express |language=en}} Line 4 was approved in June 2016,{{cite web |title=Maharashtra Cabinet Gives Go-Ahead For Two Metro Lines |url=http://www.ndtv.com/mumbai-news/maharashtra-cabinet-gives-go-ahead-for-two-metro-lines-1467281 |url-status=live |archive-url=https://web.archive.org/web/20161018205738/http://www.ndtv.com/mumbai-news/maharashtra-cabinet-gives-go-ahead-for-two-metro-lines-1467281 |archive-date=18 October 2016 |access-date=14 October 2016 |website=NDTV.com}} and was estimated to cost {{INRConvert|14549|c}}.{{cite web|title=Mumbai to get two more Metro Rails|url=http://www.business-standard.com/article/news-ians/mumbai-to-get-two-more-metro-rails-116092701141_1.html|website=Business Standard India|access-date=14 October 2016|date=27 September 2016|archive-date=18 October 2016|archive-url=https://web.archive.org/web/20161018202852/http://www.business-standard.com/article/news-ians/mumbai-to-get-two-more-metro-rails-116092701141_1.html|url-status=live}}

The foundation stone for Metro 4 was laid by Prime Minister Narendra Modi on 24 December 2016.{{cite web|title=MMRDA invites civil work bids for two Metro projects|url=http://timesofindia.indiatimes.com/city/mumbai/mmrda-invites-civil-work-bids-for-two-metro-projects/articleshow/56341075.cms|website=The Times of India|access-date=10 February 2017|archive-date=12 February 2017|archive-url=https://web.archive.org/web/20170212043828/http://timesofindia.indiatimes.com/city/mumbai/mmrda-invites-civil-work-bids-for-two-metro-projects/articleshow/56341075.cms|url-status=live}} The Maharashtra Coastal Zone Management Authority granted Coastal Regulation Zone (CRZ) clearance to the project in February 2017. Over {{Cvt|1|km}} of the line passes over water bodies in Bhakti Park and Wadala, both areas classified as CRZ II, where regulations limit construction activities. A total of 48 piers are proposed to be built in the CRZ II zone. The MMRDA proposed building metro car depots for the line on a {{Convert|30|ha|adj=on}} plot at Owala village in Thane district and another in Vikhroli.{{cite web|title=Wadala-Thane metro line clears CRZ hurdle - Mumbai Mirror -|url=http://mumbaimirror.indiatimes.com/mumbai/other/wadala-thane-metro-line-clears-crz-hurdle/articleshow/57368425.cms|website=Mumbai Mirror|access-date=27 February 2017|archive-date=28 February 2017|archive-url=https://web.archive.org/web/20170228000534/http://mumbaimirror.indiatimes.com/mumbai/other/wadala-thane-metro-line-clears-crz-hurdle/articleshow/57368425.cms|url-status=live}} The agency stated that the line would require two depots due to its length.{{Cite web |date=2018-11-11 |title=Mumbai: MMRDA to acquire private land in Thane for Metro 4 car shed |url=https://indianexpress.com/article/cities/mumbai/mumbai-mmrda-to-acquire-private-land-in-thane-for-metro-4-car-shed-5440872/ |access-date=2023-07-10 |website=The Indian Express |language=en}}

The MMRDA used a drone to carry out survey work for Metro 4. The drones were fitted with 360 degrees camera that provide up to {{Convert|3|mm}} accuracy. The aerial survey takes less time than a regular survey, achieves greater accuracy and helps protect against false claims for compensation.{{cite web|title=MMRDA plans drone survey for other Metro lines|url=http://indianexpress.com/article/cities/mumbai/mmrda-plans-drone-survey-for-other-metro-lines/|website=The Indian Express|access-date=7 March 2017|date=7 March 2017|archive-date=7 March 2017|archive-url=https://web.archive.org/web/20170307021303/http://indianexpress.com/article/cities/mumbai/mmrda-plans-drone-survey-for-other-metro-lines/|url-status=live}} In February 2017, the MMRDA said it was studying the feasibility of extending the corridor from Kasarvadavali to Gaimukh.{{Cite web |date=2017-02-02 |title=Mumbai Metro Phase 4 may cover entire Ghodbunder Road stretch in Thane |url=https://www.hindustantimes.com/mumbai-news/mumbai-metro-phase-4-may-cover-entire-ghodbunder-road-stretch-in-thane/story-TeIIOQND0LMR2QrjjqdE7K.html |access-date=2023-07-10 |website=Hindustan Times |language=en}} In March 2017, the agency said that it was conducting a pre-feasbility study on extending the line from Wadala to Mumbai General Post Office in South Mumbai, via the Mumbai Port Trust. The proposed {{Cvt|8|km|2}} extension is estimated to cost {{INR}}300 crore per kilometer.{{cite web|title=MMRDA plans to extend Metro-IV route from Wadala to GPO|url=http://timesofindia.indiatimes.com/city/mumbai/mmrda-plans-to-extend-metro-iv-route-from-wadala-to-gpo/articleshow/57658019.cms|website=The Times of India|access-date=17 March 2017|archive-date=16 March 2017|archive-url=https://web.archive.org/web/20170316183153/http://timesofindia.indiatimes.com/city/mumbai/mmrda-plans-to-extend-metro-iv-route-from-wadala-to-gpo/articleshow/57658019.cms|url-status=live}}{{cite web|title=Mumbai Metro's Thane-Wadala line likely to be extended to CST/GPO {{!}} Latest News & Updates at Daily News & Analysis|url=http://www.dnaindia.com/mumbai/report-mumbai-metro-s-thane-wadala-line-likely-to-be-extended-to-cstgpo-2354211|website=dna|access-date=17 March 2017|date=16 March 2017|archive-date=17 March 2017|archive-url=https://web.archive.org/web/20170317235343/http://www.dnaindia.com/mumbai/report-mumbai-metro-s-thane-wadala-line-likely-to-be-extended-to-cstgpo-2354211|url-status=live}} The extension from Kasarvadavli to Gaimukh was approved by Fadnavis at the 144th meeting of the MMRDA on 12 January 2018. The {{Cvt|2.7|km|2}} extension is estimated to cost {{INRConvert|949|c}}.{{Cite web |date=2018-01-12 |title=Mumbai Metro 4 will now reach Thane's Ghodbunder Road |url=https://www.hindustantimes.com/mumbai-news/mumbai-metro-4-will-now-reach-thane-s-ghodbunder-road/story-40VlEGS7Nijv76S7xyePkM.html |access-date=2023-07-10 |website=Hindustan Times |language=en}}{{Cite web |date=December 27, 2018 |title=Kasarvadavali-Gaikmukh metro project in Thane approved |url=https://mumbaimirror.indiatimes.com/mumbai/other/kasarvadavali-gaikmukh-metro-project-approved/articleshow/67272993.cms |access-date=2023-07-10 |website=Mumbai Mirror |language=en}}

The MMRDA appointed Systra MVA Consulting India Pvt. Ltd. as the detail design consultants for Line 4 on 9 November 2017.{{cite web |title=MMRDA's Executive Committee Meeting held today Contractors, consultants appointed for MTHL, Metro-4, Wadala Truck Terminal and flyover on NH-4 |url=https://mmrda.maharashtra.gov.in/documents/10180/10922305/ec+meet+91117.pdf/e2a64a66-217a-455c-9d1f-b26a48475759 |website=MMRDA |access-date=10 July 2023 |date=9 November 2017}} A consortium of DB Engineering, Louis Berger and Hill International was awarded a project management and construction management services contract for the Metro 4 project in April 2018.{{cite web |last1=Berger |first1=Louis |title=Louis Berger awarded Mumbai Metro Line 4 contract in India |url=https://globenewswire.com/news-release/2018/04/10/1467820/0/en/Louis-Berger-awarded-Mumbai-Metro-Line-4-contract-in-India.html |url-status=live |archive-url=https://web.archive.org/web/20181009092826/https://globenewswire.com/news-release/2018/04/10/1467820/0/en/Louis-Berger-awarded-Mumbai-Metro-Line-4-contract-in-India.html |archive-date=9 October 2018 |access-date=9 October 2018 |website=GlobeNewswire News Room}}{{cite web |date=10 April 2018 |title=DB Engineering-Louis Berger bags contract for Mumbai Metro 4 |url=https://www.dnaindia.com/business/report-mumbai-metro-db-engineering-louis-berger-bags-four-contracts-2603162 |url-status=live |archive-url=https://web.archive.org/web/20181009135027/https://www.dnaindia.com/business/report-mumbai-metro-db-engineering-louis-berger-bags-four-contracts-2603162 |archive-date=9 October 2018 |access-date=9 October 2018 |website=dna}} In October 2018, the MMRDA announced that it would construct Metro 4 along with three flyovers to minimize traffic disruption, with the metro running on the upper deck of the flyover. The three flyovers will be built at Bhayander Pada, Kasarvadavli and Anandnagar near Ghodbunder.{{cite web |title=Metro-4, 9 to be built along with flyovers |url=http://www.asianage.com/metros/mumbai/011018/metro-4-9-to-be-built-along-with-flyovers.html |website=The Asian Age |access-date=9 October 2018 |date=1 October 2018 |archive-date=9 October 2018 |archive-url=https://web.archive.org/web/20181009132015/http://www.asianage.com/metros/mumbai/011018/metro-4-9-to-be-built-along-with-flyovers.html |url-status=live }}{{cite web |title=Mumbai: MMRDA to build Metro 4 & 9 corridors along with flyovers |url=http://www.freepressjournal.in/mumbai/mumbai-mmrda-to-build-metro-4-9-corridors-along-with-flyovers/1367993 |website=Free Press Journal |access-date=9 October 2018 |date=4 October 2018 |archive-date=9 October 2018 |archive-url=https://web.archive.org/web/20181009092815/http://www.freepressjournal.in/mumbai/mumbai-mmrda-to-build-metro-4-9-corridors-along-with-flyovers/1367993 |url-status=live }}

In May 2019, MMRDA Metropolitan Commissioner R.A. Rajeev announced a modified plan to use Siddharth Colony as the interchange station with Line 2. The original plan had proposed to use the Eastern Express Highway station on Line 2B and Siddharth Colony on Line 4 as the interchange stations. However, the two stations are approximately {{Convert|480|m}} away from Siddharth Colony and the change was made to simplify passenger transfers.{{cite web |last1=Naik |first1=Yogesh |date=21 May 2019 |title=MMRDA redrafts plans for better connectivity between Mumbai Metro corridors |url=https://mumbaimirror.indiatimes.com/mumbai/other/mmrda-redrafts-plans-for-better-connectivity-between-mumbai-metro-corridors/articleshow/69432455.cms |website=Mumbai Mirror |access-date=6 June 2019 |language=en |archive-date=6 June 2019 |archive-url=https://web.archive.org/web/20190606052318/https://mumbaimirror.indiatimes.com/mumbai/other/mmrda-redrafts-plans-for-better-connectivity-between-mumbai-metro-corridors/articleshow/69432455.cms |url-status=live }}

The MMRDA considered plots in Wadala, Aarey Colony and Gaimukh Nagar in Thane to build a depot for the line.{{Cite web |date=2018-11-11 |title=Mumbai: MMRDA to acquire private land in Thane for Metro 4 car shed |url=https://indianexpress.com/article/cities/mumbai/mumbai-mmrda-to-acquire-private-land-in-thane-for-metro-4-car-shed-5440872/ |access-date=2023-07-10 |website=The Indian Express |language=en}} On 16 October 2023, the state urban development allotted a {{Convert|174|ha|4=0|adj=on}} plot of land at Mogharpada in Thane to the MMRDA at no cost. Nine hectares of the plot is reserved for use by the BMC for the Coastal Road and a further {{Convert|29|ha}} is protected mangrove land. The MMRDA will utilize a portion of the remaining plot to build a depot that serves Lines 4, 10 and 11. The land left over after building the depot is zoned for residential and commercial use.{{Cite news |date=2023-10-16 |title=Integrated Metro car shed on 435 acres at Thane for Metro Line 4, 4A, 10 & 11 |work=The Times of India |url=https://timesofindia.indiatimes.com/city/thane/integrated-metro-car-shed-on-435-acres-at-thane-for-metro-line-4-4a-10-11/articleshow/104476191.cms |access-date=2023-11-04 |issn=0971-8257}}{{Cite news |date=2023-10-17 |title=One car shed for 4 Metro lines to come up in Thane |work=The Times of India |url=https://timesofindia.indiatimes.com/city/mumbai/one-car-shed-for-4-metro-lines-to-come-up-in-thane/articleshow/104480565.cms |access-date=2023-11-04 |issn=0971-8257}}

|{{INRConvert|540.00|c}}

|Reliance – Astaldi JV

|03 Mar 2018

|-

|CA-09

|Amar Mahal Junction – Surya Nagar

|{{Cvt|6.41|km|}}

|{{INRConvert|538.03|c}}

|TPL – CHEC JV

|03 Mar 2018

|-

|CA-10

|Surya Nagar – Sonapur

|{{Cvt|6.68|km|}}

|{{INRConvert|513.00|c}}

|Reliance – Astaldi JV

|03 Mar 2018

|-

|CA-11

|Sonapur – Majiwada

|{{Cvt|6.10|km|}}

|{{INRConvert|510.22|c}}

|TPL – CHEC JV

|03 Mar 2018

|-

|CA-12

|Majiwada – Kasarvadavali

|{{Cvt|6.84|km|}}

|{{INRConvert|531.00|c}}

|Reliance – Astaldi JV

|03 Mar 2018

|-

|CA-54

|Kasarvadavali – Gaimukh

|{{Cvt|2.88|km|}}

|{{INRConvert|342.00|c}}

|J Kumar

|13 Sept 2019

|-

! colspan="2" |Total

|{{Cvt|35.20|km|}}

|{{INRConvert|2974.25|c}}

! colspan="2" |

|-

! colspan="6" align="center" style="background:#{{rcr|Mumbai Metro|Line 4}};" | Architectural Finishing Works

|-

!Package

!colspan="2" | Section

!Successful bid/cost

!Contractor

!Award

|-

|CA-194

|colspan="2" | Majiwada – Mulund Fire Station

| {{INRConvert|245.64|c}}

|Eagle Infra

|08 Feb 2024

|-

|CA-222

|colspan="2" | Surya Nagar – Garodia Nagar

|{{INRConvert|251.02|c}}

|Godrej and Boyce

|29 Feb 2024

|-

|CA-243

|colspan="2" | Hiranandani Estate – Kapurbawdi

|colspan="3" |Bidding Underway

|-

|CA-257

|colspan="2" |Gaimukh – Vijay Garden

|colspan="3" |Bidding Underway

|-

! colspan="3" |Total

|{{INRConvert|496.66|c}}

! colspan="2" |

|-

! colspan="6" align="center" style="background:#{{rcr|Mumbai Metro|Line 4}};" | Miscellaneous

|-

!Package

! colspan="2" |Contract

!Successful bid/cost

!Contractor

!Award

|-

|CA-160

| colspan="2" |Moghapada Depot Construction

|{{INRConvert|905.77|c}}

|SEW – VSE

|26 Sept 2023

|-

|CA-161

| colspan="2" |Track Work for Mulund Fire Station – Gaimukh

|{{INRConvert|121.55|c}}

|Apurvakriti Infra

|26 Sept 2023

|-

|CA-168

| colspan="2" |Track Work for Bhakti Park – Mulund Fire Station

|To Be Confirmed

|Larsen & Toubro

|To Be Confirmed

|-

|CA-234

| colspan="2" |Rolling Stock, Platform Screen Door & Signaling Contract

|To Be Confirmed

|Larsen & Toubro – Alstom

|To Be Confirmed

|-

|CA-236

| colspan="2" |Power Supply & Traction, E&M, Lifts & Escalators

|To Be Confirmed

|IRCON – Jakson

|To Be Confirmed

|-

! colspan="3" |Total

|{{INRConvert|1027.32|c}}

! colspan="2" |

|-

! colspan="3" |Total Cost

|{{INRConvert|4471.23|c}}

! colspan="2" |

|}

File:DreamLine Mumbai Metro 4.jpg

The MMRDA invited bids for civil work on the corridor on 4 January 2017.{{cite web|title=MMRDA invites bids for 2 metro projects|url=http://www.dnaindia.com/mumbai/report-mmrda-invites-bids-for-2-metro-projects-2289395|website=dna|access-date=10 February 2017|date=5 January 2017|archive-date=8 January 2017|archive-url=https://web.archive.org/web/20170108151249/http://www.dnaindia.com/mumbai/report-mmrda-invites-bids-for-2-metro-projects-2289395|url-status=live}}{{cite web|title=MMRDA invites tenders for design, construction of stations, viaducts for new Metro routes|url=http://indianexpress.com/article/cities/mumbai/mmrda-invites-tenders-for-design-construction-of-stations-viaducts-for-new-metro-routes-4459347/|website=The Indian Express|access-date=10 February 2017|language=en|date=5 January 2017|archive-date=11 February 2017|archive-url=https://web.archive.org/web/20170211081334/http://indianexpress.com/article/cities/mumbai/mmrda-invites-tenders-for-design-construction-of-stations-viaducts-for-new-metro-routes-4459347/|url-status=live}}{{cite web|title=Racing against 2021 deadline, Maharashtra opens bids for two more Metro lines|url=http://www.hindustantimes.com/mumbai-news/racing-against-2021-deadline-maharashtra-opens-bids-for-two-more-metro-lines/story-0HhFwTLQIr5UeF3sNNH5BL.html|website=Hindustan Times|access-date=10 February 2017|language=en|date=5 January 2017|archive-date=11 February 2017|archive-url=https://web.archive.org/web/20170211081207/http://www.hindustantimes.com/mumbai-news/racing-against-2021-deadline-maharashtra-opens-bids-for-two-more-metro-lines/story-0HhFwTLQIr5UeF3sNNH5BL.html|url-status=live}} The tenders for construction of viaducts and stations were divided into five packages - Wadala to Amar Mahal Junction, Garodia Nagar to Surya Nagar, Gandhi Nagar to Sonapur, Mulund Fire Station to Majiwada and Kapurbawdi to Kasarvadavali.{{cite web|last1=Correspondent|first1=Special|title=MMRDA invites tenders for Metro-2B and 4|url=http://www.thehindu.com/news/cities/mumbai/MMRDA-invites-tenders-for-Metro-2B-and-4/article16995345.ece|website=The Hindu|access-date=12 February 2017|language=en|archive-date=6 January 2017|archive-url=https://web.archive.org/web/20170106163047/http://www.thehindu.com/news/cities/mumbai/MMRDA-invites-tenders-for-Metro-2B-and-4/article16995345.ece|url-status=live}}{{cite web|title=Mumbai commute to get faster, firms queue up to build two more Metro lines|url=http://www.hindustantimes.com/mumbai-news/mumbai-commute-to-get-faster-firms-queue-up-to-build-two-more-metro-lines/story-ZAP8eA2hCU82SYSh4yHyEJ.html|website=Hindustan Times|access-date=13 May 2017|language=en|date=13 May 2017|archive-date=14 May 2017|archive-url=https://web.archive.org/web/20170514021351/http://www.hindustantimes.com/mumbai-news/mumbai-commute-to-get-faster-firms-queue-up-to-build-two-more-metro-lines/story-ZAP8eA2hCU82SYSh4yHyEJ.html|url-status=live}} Metro 4 was tendered alongside Metro 2B. L&T, Afcons Infrastructure, Tata, NCC and JMC, Reliance Infrastructure-RdE, JKumar Group, ITD Cementation, CHEC-TPL bid for packages on both Metro 2B and Metro 4. A total of 10 firms and/or consortia submitted bids for the two lines, two of whom (Simplex Infrastructure and a consortium of GHEC-RCC-JV-China) bid exclusively for Metro 2B packages.{{cite web|title=MMRDA receives interest from domestic, foreign firms for metro|url=http://indiatoday.intoday.in/story/mmrda-receives-interest-from-domestic-foreign-firms-for-metro/1/952672.html|website=India Today|access-date=13 May 2017|archive-date=14 June 2017|archive-url=https://web.archive.org/web/20170614172934/http://indiatoday.intoday.in/story/mmrda-receives-interest-from-domestic-foreign-firms-for-metro/1/952672.html|url-status=live}}{{cite web|title=R Infra, 10 others bid for Metro-2B, Metro-4 corridors|url=http://www.asianage.com/metros/mumbai/130517/r-infra-10-others-bid-for-metro-2b-metro-4-corridors.html|website=Asian Age|access-date=13 May 2017|date=13 May 2017|archive-date=24 May 2017|archive-url=https://web.archive.org/web/20170524003437/http://www.asianage.com/metros/mumbai/130517/r-infra-10-others-bid-for-metro-2b-metro-4-corridors.html|url-status=live}}

The construction work was awarded through the engineering, procurement and construction (EPC) model in April 2018. A joint venture between Reliance Infrastructure and Italian firm Astaldi S.p.A. was awarded three packages between Kasarwadavali and Wadala worth {{INRConvert|1584|c}}.{{cite web |title=Reliance Infra bags three packages of Mumbai Metro Line 4 |url=https://economictimes.indiatimes.com/industry/indl-goods/svs/construction/reliance-infra-bags-three-packages-of-mumbai-metro-line-4/articleshow/63744669.cms |website=The Economic Times |access-date=9 October 2018 |date=13 April 2018 |archive-date=9 October 2018 |archive-url=https://web.archive.org/web/20181009094110/https://economictimes.indiatimes.com/industry/indl-goods/svs/construction/reliance-infra-bags-three-packages-of-mumbai-metro-line-4/articleshow/63744669.cms |url-status=live }} The contract for the remaining two packages, worth a combined {{INRConvert|1048|c}}, was awarded to a joint venture between Tata Projects Limited and China Harbour Engineering Company.{{cite web |title=Tata Projects bag Rs 1,048 crore Mumbai Metro packages |url=https://economictimes.indiatimes.com/industry/indl-goods/svs/engineering/tata-projects-bag-rs-1048-crore-mumbai-metro-packages/articleshow/63751382.cms |website=The Economic Times |access-date=9 October 2018 |date=13 April 2018 |archive-date=9 October 2018 |archive-url=https://web.archive.org/web/20181009094122/https://economictimes.indiatimes.com/industry/indl-goods/svs/engineering/tata-projects-bag-rs-1048-crore-mumbai-metro-packages/articleshow/63751382.cms |url-status=live }} The civil work was expected to be completed in 30 months.{{Cite news|url=https://www.business-standard.com/article/companies/reliance-infrastructure-tata-projects-win-bids-for-mumbai-metro-project-118041301345_1.html|title=Reliance Infrastructure, Tata Projects win bids for Mumbai Metro project|last=Pillay|first=Amritha|date=2018-04-14|work=Business Standard India|access-date=2018-08-09|archive-date=9 August 2018|archive-url=https://web.archive.org/web/20180809215438/https://www.business-standard.com/article/companies/reliance-infrastructure-tata-projects-win-bids-for-mumbai-metro-project-118041301345_1.html|url-status=live}} Construction began in October 2018.{{Cite web |date=2022-06-03 |title=Metro Lines 4, 5 connecting Thane to different cities to be completed only by 2025, says MMRDA official |url=https://www.hindustantimes.com/cities/mumbai-news/metro-lines-4-5-connecting-thane-to-different-cities-to-be-completed-only-by-2025-says-mmrda-official-101654263919973.html |access-date=2023-07-10 |website=Hindustan Times |language=en}} About 80% of soil-investigation works and 66% of utility works had been completed by 3 June 2019.{{Cite web |date=2019-06-17 |title=Metro lines 4 and 5 to be linked at station in Thane |url=https://www.hindustantimes.com/mumbai-news/metro-lines-4-and-5-to-be-linked-at-station-in-thane/story-ExLA0iRu8QWQnm16T5v0QJ.html |access-date=2023-07-10 |website=Hindustan Times |language=en}}

In September 2019, the MMRDA awarded a {{INRConvert|342|c}} contract to J Kumar Infraprojects to build the viaduct and two stations for the Metro 4A extension from Kasarvadavli to Gaimukh.{{Cite news |date=2019-09-10 |title=Contractor for Metro 4A named |work=The Times of India |url=https://timesofindia.indiatimes.com/city/mumbai/contractor-for-metro-4a-named/articleshow/71059497.cms |access-date=2023-07-10 |issn=0971-8257}}{{Cite news |title=Mumbai Metro 4A bags civil contracts |url=https://urbantransportnews.com/j-kumar-infraprojects-bags-civil-contracts-of-mumbai-metro-4a-and-metro-9 |url-status=live |access-date=30 November 2020 |archive-url=https://web.archive.org/web/20191013050624/https://urbantransportnews.com/j-kumar-infraprojects-bags-civil-contracts-of-mumbai-metro-4a-and-metro-9/ |archive-date=13 October 2019}} In August 2020, the Bombay High Court granted the MMRDA permission to carry out construction in a mangrove buffer zone.{{cite web |title=High Court gives nod for Metro Line 4 in Mumbai's mangrove buffer zone |url=https://www.business-standard.com/article/current-affairs/high-court-gives-nod-for-metro-line-4-in-mumbai-s-mangrove-buffer-zone-120080501415_1.html |access-date=10 July 2023 |website=Business Standard}} Survey work on the land for a depot at Mogharpada began in January 2022.{{Cite web |date=2022-01-28 |title=Hurdles for Wadala to Thane Metro Line 4 cleared; survey of car shed land begins |url=https://www.hindustantimes.com/cities/mumbai-news/hurdles-for-wadala-to-thane-metro-line-4-cleared-survey-of-car-shed-land-begins-101643381045196.html |access-date=2023-07-10 |website=Hindustan Times |language=en}}

The MMRDA stated that 37% of total work on Lines 4 and 4A had been completed by June 2022. The agency stated that 43.44% of viaducts and 25.20% of work on stations on Line 4 had been completed. On Line 4A, 39.03% of viaducts and 19.82% of work on stations was completed.{{Cite web |title=Four years on, Mumbai-Thane Metro Line 4 still only 37% complete |url=https://www.freepressjournal.in/mumbai/four-years-on-mumbai-thane-metro-line-4-still-only-37-complete |access-date=2023-07-10 |website=Free Press Journal |language=en}} By November 2022, 41% of civil works on Line 4 and 45% of work on Line 4A had been completed.{{Cite web |title=Mumbai: Here is latest update of more than dozen Metro projects in the city |url=https://www.freepressjournal.in/mumbai/mumbai-here-is-latest-update-of-more-than-dozen-metro-projects-in-the-city |access-date=2023-07-10 |website=Free Press Journal |language=en}}{{Cite web |date=2022-11-04 |title=State of the Mumbai Metro: 14 lines in the works, two nearing completion |url=https://indianexpress.com/article/cities/mumbai/mumbai-metro-state-nearing-completion-8250369/ |access-date=2023-07-10 |website=The Indian Express |language=en}}

The Bombay High Court dismissed two petitions filed by Indo Nippon Chemical Co. Ltd. and Shree Yashwant Co-operative Housing Society Ltd. challenging the alignment for Line 4 in March 2023.{{Cite web |title=Mumbai: Bombay HC dismisses plea challenging Metro Line 4 |url=https://www.freepressjournal.in/mumbai/mumbai-bombay-hc-dismisses-plea-challenging-metro-line-4 |access-date=2023-11-04 |website=Free Press Journal |language=en}} In September 2023, the MMRDA awarded a {{INRConvert|905|c}} contract to a joint venture between SEW Infrastructure and Vishwa Samudra Engineering to build the depot at Mogharpada. It also awarded a {{INRConvert|121|c}} to Apurvakriti Infrastructure Pvt Ltd. lay ballastless railway tracks connecting Mulund Fire Station with Gaimukh and the depot.{{Cite news |date=2023-09-27 |title=Mum-Thane Metro depot construction: Contractor appointed |work=The Times of India |url=https://timesofindia.indiatimes.com/city/thane/mum-thane-metro-depot-construction-contractor-appointed/articleshow/103979146.cms |access-date=2023-11-04 |issn=0971-8257}}

On 12 April 2023, MMRDA in press release stated that Green Line 4 project status is 49%.{{Cite web |date=12 April 2023 |title=Metro line 4 achieves 49% Physical Work Completion |url=https://mmrda.maharashtra.gov.in/documents/10180/28561757/news.pdf/e6765e3c-bc31-4fbd-805e-cfd5b8cfe50d?version=1.0 |access-date=14 May 2023 |language=English}}

Status as on 10.02.2025{{Cite web |title=Metro Line - 4 {{!}} Mumbai Metropolitan Region Development Authority |url=https://mmrda.maharashtra.gov.in/projects/transport/metro-line-4/overview |archive-url=http://web.archive.org/web/20250115020622/https://mmrda.maharashtra.gov.in/projects/transport/metro-line-4/overview |archive-date=2025-01-15 |access-date=2025-02-22 |website=mmrda.maharashtra.gov.in |language=en}}

On 30 December 2022, MMRDA in press release stated that Green Line 4A project status is 45%.{{Cite web |date=30 December 2022 |title=MMRDA Press Release 30th December 2022 |url=https://mmrda.maharashtra.gov.in/documents/10180/26796758/news1.pdf/bcfe24d9-7a7f-45aa-8d61-983c4fdb7223?version=1.0 |access-date=20 April 2023 |language=Marathi}}

32 stations are being planned on Line 4. Most of them were either in the stage of planning or under early stages of construction (as of November 2018) {{Cite news|url=https://mmrda.maharashtra.gov.in/metro-line-4|title=Mumbai Metro 4 – Wadala–Ghatkopar-Mulund–Teen Hath Naka–Kasarvadavali Station|access-date=7 June 2017|archive-date=5 October 2017|archive-url=https://web.archive.org/web/20171005101453/https://mmrda.maharashtra.gov.in/metro-line-4|url-status=live}}

2 stations are being planned on Line 4A. Connected to word Gaimukh to Kasarvadavali also connect Metro 10.

Line 4 is estimated to cost {{INRConvert|14549|c}},{{Cite web |date=2023-02-08 |title=Non-confirmation of depot land: Fate of 3 new Mumbai Metro lines hangs in balance |url=https://indianexpress.com/article/cities/mumbai/non-confirmation-depot-land-mumbai-metro-lines-8431678/ |access-date=2023-07-10 |website=The Indian Express |language=en}} and Line 4A is estimated to cost {{INRConvert|949|c}}. The Maharashtra Government signed an €545 million (₹4,000 crore) loan agreement with German development bank KfW to fund construction of Metro 4 and 4A in November 2020.{{Cite web |date=2020-11-07 |title=German bank extends credit line for 2 lines of Mumbai Metro |url=https://indianexpress.com/article/cities/mumbai/german-bank-extends-credit-line-for-2-lines-of-mumbai-metro-6986626/ |access-date=2023-07-10 |website=The Indian Express |language=en}}

The MMRDA awarded a {{INRConvert|1854|c}} contract to Alstom to supply 234 metro coaches for Line 4 and 4A in March 2021.{{Cite news |date=2021-03-31 |title=Alstom to make 39 rakes for Metro 4, 4A for Rs 2k cr in Mumbai |work=The Times of India |url=https://timesofindia.indiatimes.com/city/mumbai/alstom-to-make-39-rakes-for-metro-4-4a-for-rs-2k-cr-in-mumbai/articleshow/81768074.cms |access-date=2023-07-10 |issn=0971-8257}} This was Alstom's first order after acquiring Bombardier Transportation in January 2021.{{Cite web |date=2021-03-30 |title=Alstom wins €220-million contract to manufacture 234 metro cars for Mumbai Metro Lines 4, 4A |url=https://www.thehindubusinessline.com/companies/alstom-wins-220-million-contract-to-manufacture-234-metro-cars-for-mumbai-metro-lines-4-4a/article34196204.ece |access-date=2023-07-10 |website=www.thehindubusinessline.com |language=en}}{{Cite web |date=2021-01-19 |title=Mumbai Metro-4 coaches: Bombardier lowest bidder, Chinese manufacturer 'non-responsive' |url=https://www.hindustantimes.com/cities/mumbai-news/mumbai-metro-4-coaches-bombardier-lowest-bidder-chinese-manufacturer-nonresponsive-101611000082386.html |access-date=2023-07-10 |website=Hindustan Times |language=en}} However, the company initially cancelled the order in March 2022, citing delays in completing the project.{{Cite web |date=2022-03-04 |title=Alstom cancels order bagged from MMRDA for supply of coaches for Mumbai Metro 4 |url=https://www.moneycontrol.com/news/business/economy/alstom-cancels-order-bagged-from-mmrda-for-supply-of-coaches-for-mumbai-metro-4-8195151.html |access-date=2023-07-10 |website=Moneycontrol |language=en}} In February 2025, Larsen & Toubro (L&T), in collaboration with Alstom, has been awarded a significant contract to supply critical systems for the line. This contract encompasses the provision of 39 six-coach trains, Communication-Based Train Control (CBTC) signaling and train control systems, telecommunications, platform screen doors, and depot machinery and plant for the Mogharpada Depot.{{Cite web |date=2025-02-16 |title=L&T, in partnership with Alstom, has secured Mumbai Metro Line 4's rolling stock and signaling contract. T |url=https://www.manufacturingtodayindia.com/mumbai-metros-line-4-set-for-upgrade-with-new-lt-alstom-partnership |access-date=2025-02-25 |language=en-US}}

The depot for the line is located at Mogharpada in Thane. It will also serve as the depot for Line 10 and Line 11. The depot has a maximum capacity for 64 stabling lines, half of which are reserved for future use, in addition to 10 inspection bays lines and 10 workshop lines. The depot also houses the operational control centre, administrative building, maintenance and workshop building, auxiliary substation, and staff quarters.

The Bhakti Park station will have a pocket track to enable trains to park off the main line. Line 4's depot at Mogharpada also serves Line 10 and Line 11 which creates the possibility of trains having to run without passengers from the depot to Chhatrapati Shivaji Terminus during morning hours. The pocket track enables trains to park off the main line without traveling to the last station on the line.{{Cite web |date=2023-03-17 |title=MMRDA to construct pocket track at Mumbai's Bhakti Park Metro Line 4 station |url=https://indianexpress.com/article/cities/mumbai/mmrda-to-construct-pocket-track-at-mumbais-bhakti-park-metro-line-4-station-8502735/ |access-date=2023-11-04 |website=The Indian Express |language=en}}

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Category:Mumbai Metro lines