Line 4 (Mumbai Metro)
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| Operating speed | 90 km/h (56 mph) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Highest elevation | 3.90 m (12.8 ft) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Line 4 (Green Line) of the Mumbai Metro is an under-construction rapid transit line in Mumbai, Maharashtra, India.
The Mumbai Metropolitan Region Development Authority (MMRDA) and a consortium of international companies are developing the line.[3]
The 32.32 km (20.08 mi) line is planned to be fully elevated, and is expected to consist of 32 stations from
Alstom was initially chosen to provide rolling stock for the line, but the contract was cancelled in 2022.[5][6]
Planning
In June 2015, the Mumbai Metropolitan Region Development Authority (MMRDA) proposed building a 32 km Wadala-Thane-Kasarvadavali metro line as part of a plan to build six new metro lines at a total estimated cost of ₹64,000 crore (US$8.0 billion).[7] Line 4 was approved in June 2016,[8] and was estimated to cost ₹14,549 crore (US$1.8 billion).[9]
The foundation stone for Metro 4 was laid by Prime Minister Narendra Modi on 24 December 2016.[10] The Maharashtra Coastal Zone Management Authority granted Coastal Regulation Zone (CRZ) clearance to the project in February 2017. Over 1 km (0.62 mi) 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 30 hectare plot at Owala village in Thane district and another in Vikhroli.[11] The agency stated that the line would require two depots due to its length.[12]
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 3 millimetres (0.12 in) accuracy. The aerial survey takes less time than a regular survey, achieves greater accuracy and helps protect against false claims for compensation.[13] In February 2017, the MMRDA said it was studying the feasibility of extending the corridor from Kasarvadavali to Gaimukh.[14] 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 8 km (5.0 mi) extension is estimated to cost ₹300 crore per kilometer.[15][16] The extension from Kasarvadavli to Gaimukh was approved by Fadnavis at the 144th meeting of the MMRDA on 12 January 2018. The 2.7 km extension is estimated to cost ₹949 crore (US$120 million).[17][18]
The MMRDA appointed Systra MVA Consulting India Pvt. Ltd. as the detail design consultants for Line 4 on 9 November 2017.[19] 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.[20][21] 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.[22][23]
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 480 metres away from Siddharth Colony and the change was made to simplify passenger transfers.[24]
Depot
The MMRDA considered plots in Wadala, Aarey Colony and Gaimukh Nagar in Thane to build a depot for the line.[25] On 16 October 2023, the state urban development allotted a 174 hectare (435 acre) 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 29 hectares 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.[26][27]
Construction
The MMRDA invited bids for civil work on the corridor on 4 January 2017.[28][29][30] 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.[31][32] 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.[33][34]
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 ₹1,584 crore (US$200 million).[35] The contract for the remaining two packages, worth a combined ₹1,048 crore (US$130 million), was awarded to a joint venture between Tata Projects Limited and China Harbour Engineering Company.[36] The civil work was expected to be completed in 30 months.[37] Construction began in October 2018.[38] About 80% of soil-investigation works and 66% of utility works had been completed by 3 June 2019.[39]
In September 2019, the MMRDA awarded a ₹342 crore (US$43 million) contract to J Kumar Infraprojects to build the viaduct and two stations for the Metro 4A extension from Kasarvadavli to Gaimukh.[40][41] In August 2020, the Bombay High Court granted the MMRDA permission to carry out construction in a mangrove buffer zone.[42] Survey work on the land for a depot at Mogharpada began in January 2022.[43]
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.[44] By November 2022, 41% of civil works on Line 4 and 45% of work on Line 4A had been completed.[45][46]
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.[47] In September 2023, the MMRDA awarded a ₹905 crore (US$110 million) contract to a joint venture between SEW Infrastructure and Vishwa Samudra Engineering to build the depot at Mogharpada. It also awarded a ₹121 crore (US$15 million) to Apurvakriti Infrastructure Pvt Ltd. lay ballastless railway tracks connecting Mulund Fire Station with Gaimukh and the depot.[48]
| Sl No. | Package | Contractor(s) |
|---|---|---|
| 1 | Wadala to Amar Mahal
(6.2 km Viaduct & 6 Stations) |
Reliance-Astaldi JV |
| 2 | Garodia Nagar-Surya Nagar
(6.4 km Viaduct & 7 Stations) |
TPL-CHEC JV |
| 3 | Gandhi Nagar-Sonapur
(6.7 km Viaduct & 6 Stations) |
Reliance-Astaldi JV |
| 4 | Mulund Fire Station-Majiwada
(7.1 km Viaduct & 7 Stations) |
TPL-CHEC JV |
| 5 | Kapurbawdi-Kasarvadavali
(6.8 km Viaduct & 6 Stations) |
Reliance-Astaldi JV |
| 6 | Kasarvadavali to Gaimukh
(2.7 km Viaduct & 2 Stations) |
J Kumar Infraprojects Limited |
Current status
| Status as of 21 May 2023 [49] | ||
|---|---|---|
| Sr. No. | Name of Work | Current Status |
| 1 | Pile | 89.2% |
| 2 | Pile Cap | 74.8% |
| 3 | Pier(Viaduct+Station up to CL) | 64.9% |
| 4 | Anti Crash Barrier | 56.3% |
| 5 | Road Restoration | 30.2% |
| 6 | Pier Cap Casting | 73.6% |
| 7 | Pier Cap Erection | 67.6% |
| 8 | Stitch Concrete | 66.7% |
| 9 | Stressing | 58.8% |
| 10 | Bearing Pedestal | 56.1% |
| 11 | U-Girder Casting for Viaduct | 73.1% |
| 12 | U-Girder Erection for Viaduct | 61.4% |
| 13 | I-Girder Casting for Viaduct | 27.1% |
| 14 | I-Girder Erection for Viaduct | 25.5% |
| 15 | Deck Slab Over I Girder | 25.9% |
| 16 | U Girder Casting For Station | 37.2% |
| 17 | U Girder Erection For Station | 31.3% |
| 18 | Cast in Situ Pier Head for Station (Concourse level) | 59.4% |
| 19 | Concourse Level Pier Arm Casting | 57.4% |
| 20 | Concourse Level Pier Arm Erection | 39.8% |
| 21 | Platform Level Pier Arm Casting | 57.5% |
| 22 | Platform Level Pier Arm Erection | 50.2% |
| 23 | Station L Girder Casting | 29.3% |
| 24 | Station L Girder Erection | 27.0% |
| 25 | Station T Girder Casting | 36.5% |
| 26 | Station T Girder Erection | 30.3% |
| 27 | Platform Level RCC Beam Casting | 29.2% |
Green Line 4
On 12 April 2023, MMRDA in press release stated that Green Line 4 project status is 49%.[50]
Green Line 4A
On 30 December 2022, MMRDA in press release stated that Green Line 4A project status is 45%.[51]
| History of Previous Works and Status | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sr. No. | Name of Work | Description | Status as of[49] | |||||||||||||
| 21 May 2019 | 4 July 2019 | 6 August 2019 | 21 October 2019 | 29 November 2019 | 29 January 2020 | 8 September 2020 | 1 January 2021 | 1 March 2021 | 31 May 2021 | 28 July 2021 | 18 April 2022 | 30 June 2022 | 1 September 2022 | |||
| 1 | Soil Investigation Works | Soil Investigation Work For Pier Foundation Completed | 78% | 81.0% | 82.0% | 83.0% | 85% | 87% | 90% | 93.20% | 90% | |||||
| 2 | Utility Works | Works Completed | 64% | 68.2% | 70% | 71.36% | 76% | 85% | 86% | |||||||
| 3 | Piling Works | Piling Work For
Foundations Completed |
17% | 22.7% | 25.25% | 33% | 37% | 42.56% | 55.15% | 62.40% | 65% | 66% | 67.78% | 65% | 69% | 69% |
| 4 | Pile Cap Works | Pile Cap Work Completed | 6.5% | 12.4% | 14.7% | 18.60% | 21% | 24.75% | 35.68% | 44.85% | 49% | 52% | 51.73% | 51.91% | 54% | 54% |
| 5 | Pier Works | Piers Cast | 3.5% | 8.0% | 10.2% | 15.70% | 18.3% | 29.23% | 29.29% | 38.16% | 42% | 45% | 45.92% | 46.80% | 49% | |
| 6 | Pier Cap Works | Pier Caps Cast | Nil | Casting of Pier Cap is started
at casting yard and 0.063% casting completed till June 2019 |
Casting of Pier Cap is started
at casting yard and 0.068% casting completed till July 2019 |
6% Casting completed. | 10% | 17.98% | 28.99% | 40.59% | 43% | 46% | 49.73% | 49.36% | 51% | 57.19% |
| Pier Caps Erected | Nil | 0.80% Erection completed. | 2.4% | 23.34% | 23.81% | 31.33% | 36% | 39% | 42.65% | 45.06% | 46% | 46.92% | ||||
| 7 | Cast-in-situ Pier Cap | Nil | 89% | 89.19% | ||||||||||||
| 8 | U Girder Casting | Casting yard works are in progress | Nil | Casting of U Girder started
at casting yard and 0.21% casting completed till June 2019 |
Casting of U Girder started
at casting yard and 0.41% casting completed till July 2019 |
2.33% | 6% | 11.83% | 20.09% | 33.19% | 38% | 45% | 38.13% | 38.71% | 40% | 43.68% |
| U Girder Erected | Nil | 0.9% | 15.69% | 29.97% | 24% | 31% | 26.27% | 27.86% | 32% | 36.63% | ||||||
| 9 | I Girder Casting | Nil | 8.83% | 19.09% | 21% | 24.98% | ||||||||||
| 10 | I Girder Erection | Nil | 17.21% | 19% | 22.42% | |||||||||||
| 11 | Desk Slab | Nil | 14.58% | 18% | 21.20% | |||||||||||
| 12 | Station work | Station work in progress | Pile Foundation works Started since last month | Works are in Progress | ||||||||||||
| Station Pier Head | Nil | 37% | 40.96% | |||||||||||||
| Stn Pier up to Platform level | Nil | 35% | 40.96% | |||||||||||||
| 13 | Concourse Pier Arm Casting | Nil | 40% | 43.86% | ||||||||||||
| 14 | Concourse Pier Arm Erection | Nil | 35% | 40.94% | ||||||||||||
| 15 | Platform Pier Arm Casting | Nil | 27% | 33.97% | ||||||||||||
| 16 | Platform Pier Arm Erection | Nil | 24% | 30.79% | ||||||||||||
| 17 | L Girder Casting | Nil | 11% | 15.03% | ||||||||||||
| 18 | L Girder Erection | Nil | 3% | 4.67% | ||||||||||||
| 19 | T Girder Casting | Nil | 15% | 20.67% | ||||||||||||
| 20 | T Girder Erection | Nil | 15% | 23.77% | ||||||||||||
| 21 | Platform Girder Casting | Nil | 8% | 13.31% | ||||||||||||
Stations
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) [52]
2 stations are being planned on Line 4A. Connected to word Gaimukh to Kasarvadavali also connect Metro 10.
| Green Line 4 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Station Name | Status | Connections | Layout | |||||
| English | Marathi | ||||||||
| 1 | Gaimukh |
गायमुख | Under Construction | Line 10 (Planned) | Elevated | ||||
| 2 | Gowniwada |
गोवनीवाडा | Under Construction | None | Elevated | ||||
| 3 | Kasarvadavali |
कासारवडवली | Under Construction | None | Elevated | ||||
| 4 | Vijay Gardens | विजय गार्डन | Under Construction | None | Elevated | ||||
| 5 | Hiranandani Estate | हीरानंदानी एस्टेट | Under Construction | None | Elevated | ||||
| 6 | Stretford Avenue | स्ट्रेटफर्ड ॲव्हेन्यू | Under Construction | None | Elevated | ||||
| 7 | Manpada (Thane) | मानपाडा | Under Construction | None | Elevated | ||||
| 8 | Kapurbawdi |
कापूरबावडी | Under Construction | Line 5 (Under Construction) | Elevated | ||||
| 9 | Majiwada |
माजिवाडा | Under Construction | None | Elevated | ||||
| 10 | Cadbury Junction |
कॅडबरी जंक्शन | Under Construction | None | Elevated | ||||
| 11 | Mahapalika Marg |
महापालिका मार्ग | Under Construction | None | Elevated | ||||
| 12 | Thane RTO | आरटीओ ठाणे | Under Construction | None | Elevated | ||||
| 13 | Teen Haath Naka, Thane | तीन हात नाका (ठाणे) | Under Construction | None | Elevated | ||||
| 14 | Mulund Naka |
मुलुंड नाका | Under Construction | None | Elevated | ||||
| 15 | Mulund Fire Station |
मुलुंड अग्निशमन केंद्र | Under Construction | None | Elevated | ||||
| 16 | Sonapur |
सोनापूर | Under Construction | None | Elevated | ||||
| 17 | Shangrila |
शांग्रीला | Under Construction | None | Elevated | ||||
| 18 | Bhandup |
भांडुप | Under Construction | None | Elevated | ||||
| 19 | Bhandup Mahapalika |
भांडुप महापालिका | Under Construction | None | Elevated | ||||
| 20 | Naval Housing |
नौदल गृहनिर्माण | Under Construction | None | Elevated | ||||
| 21 | Gandhi Nagar (Kanjurmarg) |
गांधी नगर (कांजूरमार्ग) | Under Construction | Line 6 (Under Construction) | Elevated | ||||
| 22 | Surya Nagar |
सूर्य नगर | Under Construction | None | Elevated | ||||
| 23 | Vikhroli |
विक्रोळी | Under Construction | None | Elevated | ||||
| 24 | Godrej Company |
गोदरेज कंपनी | Under Construction | None | Elevated | ||||
| 25 | Shreyas Cinema |
श्रेयस सिनेमा | Under Construction | None | Elevated | ||||
| 26 | Laxmi Nagar (Ghatkopar) |
लक्ष्मी नगर (घाटकोपर) | Under Construction | None | Elevated | ||||
| 27 | Pant Nagar |
पंत नगर | Under Construction | None | Elevated | ||||
| 28 | Garodia Nagar |
गरोडिया नगर | Under Construction | None | Elevated | ||||
| 29 | Amar Mahal Junction |
अमर महाल जंक्शन | To be removed | None | Elevated | ||||
| 30 | Siddharth Colony |
सिध्दार्थ कॉलनी | Under Construction | Line 2 (Under Construction) | Elevated | ||||
| 31 | Suman Nagar |
सुमन नगर | To be removed | None | Elevated | ||||
| 32 | Anik Nagar Bus Depot |
अणिक नगर बस आगार | Under Construction | None | Elevated | ||||
| 33 | Wadala Truck Terminal |
वडाळा ट्रक टर्मिनल | Under Construction | None | Elevated | ||||
| 34 | Bhakti Park (Wadala) |
भक्ति पार्क (वडाळा) | Under Construction | Line 1 (Mumbai Monorail) Line 11 (Planned) |
Elevated | ||||
Cost
Line 4 is estimated to cost ₹14,549 crore (US$1.8 billion),[53] and Line 4A is estimated to cost ₹949 crore (US$120 million).[18] The Maharashtra Government signed an EUR545 million (₹4,000 crore) loan agreement with German development bank KfW to fund construction of Metro 4 and 4A in November 2020.[54]
Infrastructure
Rolling stock
The MMRDA awarded a ₹1,854 crore (US$230 million) contract to Alstom to supply 234 metro coaches for Line 4 and 4A in March 2021.[55] This was Alstom's first order after acquiring Bombardier Transportation in January 2021.[56][57] However, the company cancelled the order in March 2022 citing delays in completing the project.[58]
Depot
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.[48]
Pocket track
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.[59]
References
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