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Line 7 (Mumbai Metro)

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Line 7 (Red Line)
Overview
StatusOperational (extension under construction)
OwnerMMRDA
Line number7
LocaleMumbai, Maharashtra, India
Termini
Stations14
WebsiteLine 7
Service
TypeRapid transit
SystemMumbai Metro
Depot(s)Charkop (temporary)
Bhayandar (planned)
Rolling stockBEML
Daily ridership212,000 (July 2023)[1]
History
Commenced8 August 2016 (2016-08-08)
Opened2 April 2022; 2 years ago (2022-04-02)
Technical
Line length16.5 km (10.3 mi)
Number of tracks2
CharacterElevated
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification25 kV 50 Hz AC overhead line
Line 7 map

Legend
Line 7
 to Line 9
Dahisar Depot
 to Line 2
0.0000
 Dahisar East
1.1404
 Ovaripada
2.1484
 Rashtriya Udyan
3.2749
 Devipada
4.0972
 Magathane
5.8249
 Poisar
6.4492
 Akurli
7.4569
 Kurar
8.3449
 Dindoshi
9.4249
 Aarey
11.7434
 Goregaon East
13.1110
 Jogeshwari East on Line 6
14.2951
 Mogra
15.5249
 Gundavali
Western Express Highway on Line 1
16.0849
 Airport Colony
to Line 3
18.9342
 CSMIA International
Airport interchange
 to Line 8

Line 7 (Red Line) is a rapid transit metro line of the Mumbai Metro in the city of Mumbai, Maharashtra, India. When completed, the 30.08 km (18.69 mi) line will connect Bhayander with the Chhatrapati Shivaji Maharaj International Airport with 24 stations. The line is mostly elevated except for the 2.49 km (1.55 mi) underground twin tunnels at its southern terminus.

A section of the line from Dahisar East to Aarey was opened on 2 April 2022, and another section from Aarey to Gundavli in Andheri (East) was inaugurated on 19 January 2023. An under construction 11.386 km section of Line 7, from Bhayander to Dahisar, is part of Red Line 9. A southward extension to the airport is also currently under construction.

The line is served by six-car trains, manufactured by Bharat Earth Movers Limited, with a headway of 10 minutes. Line 7 currently uses Line 2's depot at Charkop, due to an issue acquiring land for a depot. Services currently operate between Gundavali and Andheri West (on Line 2) via Dahisar East.

Planning

[edit]

An 18 km (11 mi) metro line connecting Andheri East and Dahisar East was proposed as Line 7 in the original Mumbai Metro master plan unveiled by the Mumbai Metropolitan Region Development Authority (MMRDA) in 2004.[2] In June 2015, the MMRDA proposed building Line 7 as part of a plan to build 6 new metro lines at a total estimated cost of ₹64,000 crore (US$7.7 billion).[3] The MMRDA approved the detailed project report for Line 7 in August 2015. The report proposed a 16.5 km (10.3 mi) elevated line between Andheri East and Dahisar East at an estimated cost of ₹4,737 crore (US$570 million).[4]

Over the course of two weeks in March–April 2017, Mumbai residents saved nearly 4,000 plants growing on dividers and along the Western Express Highway that had not been marked for replanting by metro authorities. Residents replanted these trees in their own housing societies, as well as at schools and other locations. Nearly 210 people and over 40 housing societies participated in the initiative coordinating their efforts through WhatsApp messages.[5]

In April 2017, the Ministry of Civil Aviation approved the transfer of 40 acres of land in Dahisar for the construction of the metro depot.[6][7] The Airports Authority of India and the MMRDA signed a formal agreement on 24 April 2017.[8] In June 2017, the Maharashtra Government transferred three plots of land at Aarey Colony, measuring a total of 20,387 sqm (5.03 acres), to the MMRDA for a labour camp and a casting yard for Line 7, and a centralised operation centre for the metro system.[9] In November 2021, the MMRDA cancelled the plan to build the line's depot at Dahisar and instead proposed building the depot for Line 7, and its extensions, at Rai Murdhe in Bhayandar.[10]

In February 2020, MMRDA metropolitan commissioner R.A. Rajeev stated that Line 7 would be identified as the Red Line.[11] A study by World Resources Institute (WRI) India, published in May 2021, estimated that Line 7 and Line 2A had the potential to create 1.1 million jobs in the city.[12]

Extensions

[edit]
Further information: Line 9 (Mumbai Metro)

In February 2017, the MMRDA announced that the DMRC was preparing a detailed project report (DPR) on a proposed 9 km (5.6 mi) extension of Line 7 from Dahisar to Bhayander, via Mira Road.[13] The extension would have 9 stations, with an inter-station distance of 1 km (0.62 mi). The line would run parallel to the Surat-Dahisar Highway, then turn left at Kashi Mira Junction, before passing through Mira Road-Bhayander, and terminating at Golden Nest Circle in Bhayander. The project is estimated to cost ₹3,600 crore (US$430 million).[14][15][16] In March 2017, the MMRDA stated that the DMRC was conducting a feasibility study to extend the line to Terminal 2 of the Chhatrapati Shivaji Maharaj International Airport.[17]

The extensions to Mira-Bhayander and the airport were officially announced by Chief Minister Fadnavis on 30 March 2017.[18][19][20] The alignment for the extension from Andheri to Chhatrapati Shivaji Maharaj International Terminus was approved by the State Cabinet on 12 April 2017.[21] In June 2018, the MMRDA stated that it had decided to terminate the proposed extension at the international airport and not extend it to the domestic terminal due to technical challenges. As the metro extension is proposed to be underground it would have to be constructed below or above Line 3 which also passes under the airport.[22] Line 7A is 3.42 km (2.13 mi) long including a 2.49 km (1.55 mi) underground twin tunnel.[23] The extension is partially elevated, running parallel to the Western Express Highway and Sahar Elevated Road, and goes underground just ahead of the vehicular underpass of Sahar Elevated Road.[24] The Maharashtra Cabinet approved the implementation of both extensions in September 2018.[25][26]

History
Section Extension date Termini Length Stations
Line 7[27] 2 April 2022 Dahisar East Aarey 10.7 kilometers (6.6 mi) 10
19 January 2023 Aarey Gundavali 5.8 kilometers (3.6 mi) 4
Line 7A Under Construction Gundavali CSMIA International 3.42 kilometers (2.13 mi) 2
Dahisar East CSMIA International 19.92 kilometers (12.38 mi) 16
[edit]

The depot for Line 7 was originally proposed to be located at Dahisar.[28] However, land acquisition for the Dahisar depot was delayed by litigation filed in 2016. In 2020, the MMRDA proposed using the depot at Charkop to serve both Line 2 and Line 7 by building a ring metro line to connect the two corridors. The MMRDA utilized an empty plot of land located after Ovaripada station on Line 7 to build pillars for the link connecting the two lines.[29][30] Line 2 of the Mumbai Metro connects Dahisar East with Andheri West. In November 2021, the MMRDA cancelled the plan to build the depot at Dahisar and instead proposed building the depot for Lines 7, 7A and 9 at Rai Murdhe in Bhayandar.[31] The MMRDA received 59.63 hectares of land at Dongri from the state government in August 2023.[32]

Line 2 and Line 7 were both commissioned on 2 April 2022, with services operating between Aarey and Dahanukarwadi via Dahisar East. Both lines were extended on 19 January 2023, providing circular service between Gundavali and Andheri West via Dahisar East.[33] The Charkop depot currently serves as the depot for Line 2 and Line 7. The under construction Mandale depot will be used to serve Line 2 once completed.[34]

Construction

[edit]

The bhoomipujan ceremony for Line 7 was performed by Prime Minister Narendra Modi during his visit to Mumbai on 11 October 2015.[35] Line 7 was implemented through the engineering, procurement and construction (EPC) model.[36] The MMRDA invited bids for the project in December 2015.[37] Tendering for the design and construction of the corridor was split into 3 packages. The first package included an elevated viaduct and 5 elevated stations – Andheri East, Shankarwadi, JVLR Junction, Mahanand and new Ashok Nagar. The second package included an elevated viaduct and 6 elevated stations – Aarey, Dindoshi, Pathan Wadi, Pushpa Park, Bandongri and Mahindra & Mahindra, and an elevated viaduct and 5 elevated stations – Magathane, Devipada, National Park, Ovaripada and Dahisar East. A total of 16 companies expressed interest, and 9 bids were submitted. In April 2016, the MMRDA awarded contracts to Simplex Infrastructure, J Kumar Infraprojects, and Nagarjuna Construction Company for the first, second and third packages respectively. The project is estimated to cost ₹6,208 crore (US$740 million).[38][39] The contract awarded to Simplex Infrastructure was worth ₹348 crore (US$42 million).[40]

Construction work on the corridor began on 8 August 2016. The contractors were expected to complete construction of the corridor and all 14 stations within 30 months from the day of commencement of work.[41] On 18 February 2017, MMRDA officials stated that 15% of piling, pile caps and pier work on the corridor had been completed.[42] By the end of April 2017, 25% of piling work, 60% of barricading work and 77% of the soil testing for pier foundation had been completed.[43] Line 7 stations were built on a single pier, unlike the three piers used to support stations on Line 1. The single pier design was chosen to facilitate the construction of smaller stations and reduce the amount of land occupied on the Western Express Highway which could obstruct traffic flow.[44]

On 14 March 2017, the Mumbai High Court temporarily stayed all construction activities at Metro 7's casting yard in Bandra Reclamation. The Court was hearing a PIL filed by Mohammed Furqan Ali Mohammed Qureshi who alleged that the site of the casting yard had been reserved by the Brihanmumbai Municipal Corporation (BMC) for use as a Sunni Muslim cemetery.[45][46] Piling work in Kandivli resulted in a gas pipeline bursting on 29 March 2017. The damage to the Mahanagar Gas pipeline resulted in temporary disruptions in the supply of CNG to Kandivli, Borivli, Dahisar, Mira Road and Bhayander.[47][48] Mahanagar Gas began repairing the pipeline on the evening of 31 March, and completed the work by the following evening.[49] The BMC accused Nagarjuna Construction Company of illegally operating an unlicensed concrete ready mix plant at its casting yard in April 2017.[50]

The MMRDA announced that construction of viaducts would begin in April 2017. The agency had completed construction of piers on several sections of the corridor, and the viaducts will be built at locations where pier caps have been built. The first viaduct was constructed in the section between JVLR to Mahanand. Construction of all pier caps along the corridor will be completed by the end of 2017.[51][52] The first U-girder, the concrete structure on which metro tracks are laid, was launched near Pathanwadi Junction in Malad on 2 May 2017.[53] In total, Metro 7 required 1,400 U-girders.[54] Work on erecting the U-girders, as well as disposal and dumping of muck generated from underground work was done only between 11:30 pm and 6:00 am. During this period, multi-axle trailers transported U-girders weighing 170 tonne from the casting yard in Bandra to the location where it is to be erected. The trailer had to move slowly to avoid causing imbalance to the heavy load which can result in toppling, and took roughly two hours to complete the journey. Lifting the girder and attaching it to the pier caps was also a difficult process and was carried out at night time. Traffic diversions were placed around the launching site to reduce the possibility of accidents. Officials erected an average of two girders every day.[55]

The MMRDA issued notices to all three contractors working on the project on 11 August 2017 over the "poor progress" of work. The agency stated that the although contractors were required to deploy 600 workers each, Simplex had only deployed 320, J Kumar Infraprojects had deployed 395, and NCC had deployed 318 labourers. The MMRDA had also issued a similar notice on 4 July 2017.[56] By August 2017, about 600-700 metres of each package had been constructed, 63 piers and 22 girders had been erected, and barricades had been placed on 67% of the entire route.[57] Track laying work on the line began in June 2019.[58] The first escalator on Line 7 was installed at Bandongri station in August 2019.[59]

In January 2020, the MMRDA terminated the contract awarded to Simplex Infrastructure for the first package over delay in completing the work. The next month, the agency invited bids to replace Simplex. The work was split into two tenders including one for a 6.25km viaduct and another to complete work on 4 stations. In July 2020, the MMRDA awarded a ₹174.76 crore (US$21 million) and ₹127.78 crore (US$15 million) contract to J Kumar Infraprojects and Nagarjuna Construction Company respectively to complete the work.[60] The MMRDA also encashed a bank guarantee of ₹35 crore (US$4.2 million) provided by Simplex.[61] Simplex had completed around 75% of work at the time its contract was terminated.[62]

MMRDA metropolitan commissioner R.A. Rajeev stated in September 2020 that almost 80% of construction work had been completed.[63] The MMRDA began conducting pre-trials on the rolling stock at the Charkop depot in February 2021.[64] The MMRDA announced that electrification of the line had been completed on 26 May, and the first trial runs were conducted from 31 May.[65][66] The MMRDA began a dynamic test and trial run on the 20 km stretch between Dhanukarwadi and Aarey (including a portion of Line 2) on 19 June.[67] The stretch between Dhanukarwadi and Aarey received provisional approval from the Research Designs and Standards Organisation (RDSO) in January 2022.[68] The Commissioner of Metro Rail Safety (CMRS) began inspecting the line in February 2022.[69]

A section of Line 7 from Dahisar East to Aarey (along with the section of Line 2 from Dhanukarwadi to Dahisar East ) was opened on 2 April 2022. Chief Minister Uddhav Thackeray flagged off the first train at 4pm in the presence of Deputy Chief Minister Ajit Pawar, Urban Development Minister Eknath Shinde, NCP chief Sharad Pawar and the Leader of Opposition in the Legislative Council, Pravin Darekar. The line opened for public service from 8pm, with services operating between Aarey and Dahanukarwadi (on Line 2) via Dahisar East.[70]

The remaining section of Line 7 from Goregaon East to Gundavali received approval from the RDSO in October 2022.[71] The CMRS began inspecting the line in December 2022.[72] The final section of the line (along with the final section of Line 2A from Dhanukarwadi to Andheri West) was inaugurated on 19 January 2023 by Prime Minister Narendra Modi.[73][74]

Line 7A

[edit]

Line 7A is a 3.42 km (2.13 mi) southward extension of Line 7 to Chhatrapati Shivaji Maharaj International Airport, with 2 stations. The section includes a 0.93 km (0.58 mi) elevated stretch and 2.49 km (1.55 mi) long twin tunnels.[23] The MMRDA awarded the construction contract to J. Kumar Infrastructure. Work on the extension began in March 2020.[75] Around 25% of the work on the airport extension was completed by November 2022.[76]

Tunneling work began on 1 September 2023.[77] The twin tunnels are located at depths ranging between 6 metres and 20 metres to ensure a smooth transition with the elevated section of the line.[78] Two tunnel boring machines (TBM) were utilized to build the tunnels.[78] Tunneling work is expected to be completed by December 2024.[78]

Current status for Line 7A

[edit]
Sr. No. Name of Work Status for year 2021[79]
1 March 2021 1 May 2021 1 June 2021 2 August 2021 30 September 2021
1 Survey Work 100%
2 Barricading board fixing 15% 27% 30%
3 Soil Investigation Works 86% 89% 92%
4 Utility Identification Works 28% 29% 32%
5 Piling Works 19%
Test Pile 100%
6 Working Pile 22%
7 Pile cap 9%

Stations

[edit]

Line 7 has 14 operational stations, with two more stations under construction.

Red Line 7
# Station Name[80] Opening Connections Layout
English Marathi
Line 7
1 Dahisar East दहिसर पूर्व 2 April 2022 Line 2
Line 9 (Under Construction)		 Elevated
2 Ovaripada ओवरीपाडा 2 April 2022 None Elevated
3 Rashtriya Udyan राष्ट्रीय उद्यान 2 April 2022 None Elevated
4 Devipada देवीपाडा 2 April 2022 None Elevated
5 Magathane मागाठाणे 2 April 2022 None Elevated
6 Poisar पोईसर 2 April 2022 None Elevated
7 Akurli आकुर्ली 2 April 2022 None Elevated
8 Kurar कुरार 2 April 2022 None Elevated
9 Dindoshi दिंडोशी 2 April 2022 None Elevated
10 Aarey आरे 2 April 2022 None Elevated
11 Goregaon East गोरेगाव पूर्व 19 January 2023 None Elevated
12 Jogeshwari East जोगेश्वरी पूर्व 19 January 2023 Line 6 (Under Construction) Elevated
13 Mogra मोगरा 19 January 2023 None Elevated
14 Gundavali गुंदवली 19 January 2023 Line 1 Elevated
Line 7A
15 Airport Colony विमानतळ वसाहत Under Construction None Elevated
16 CSMIA International छ.शि.म.आं.वि. ट-२ Under Construction Line 3
and Line 8 (Proposed) 		Underground

Cost

[edit]

Line 7 is estimated to cost ₹6,208 crore (US$740 million).[81] The Asian Development Bank (ADB) will provide 43-48% of the total project cost through a loan at an interest rate of 1.4%. The Government of Maharashtra is the guarantor for the loan.[54] On 2 March 2019, the Union Ministry of Finance stated that it signed a $926 million loan agreement with the ADB to fund the construction of Line 2 and Line 7. This was the single largest infrastructure loan ever extended by the ADB. The funds will be used to procure 63 six-car trainsets and for signaling and safety systems on both corridors.[82]

The proposed extension of Line 7 from Dahisar to Bhayander (called Line 9) is estimated to cost ₹3,600 crore (US$430 million), and the underground extension to the International Airport shall cost an additional ₹600 crore (US$72 million).[83]

The MMRDA allotted ₹340 crore (US$41 million) to the DMRC to implement and commission rolling stock, signalling and telecommunication work for the Metro 2A and Metro 7 corridors on 26 November 2016.[84][85][86]

Infrastructure

[edit]

Rolling stock

[edit]

BEML was awarded a ₹3,015 crore (US$360 million) contract to supply 378 metro cars (63 trainsets) for Line 7 and Line 2 in November 2018.[87] An additional 126 metro cars (21 trainsets) were ordered from BEML to cater to metro extensions.[88] All trainsets were manufactured at BEML's Rail Coach Factory in Bangalore, Karnataka. The rakes are capable of driverless operation making them the first driverless metro trains to be made in India.[89] BEML began manufacturing the coaches on 29 July 2019,[90] built the first metro coach in 75 days and unveiled it in September 2019.[91] The first trainset arrived in Mumbai on 28 January 2021.[92]

Each trainset is made up of 6 coaches with a total passenger capacity of 1,660 and dense crush load capacity of 2,092. The trainset is 3.2 metres wide, made of stainless steel and each coach has 4 doors on each side. The rake employs a regenerative braking system.[93][88]

Signalling

[edit]

Line 7 utilises the Alstom Urbalis 400 communications-based train control (CBTC) signalling system. Alstom was awarded a EUR90 million contract to supply the signalling and telecommunications systems for Mumbai Metro Line 2 and Line 7, as well as Pune Metro's Purple Line and Aqua Line in April 2019.[94][95]

Power

[edit]

Line 7 is electrified at 25 kV 50 Hz AC, with power provided via an overhead catenary. The MMRDA signed an agreement with Adani Electricity Mumbai Limited to supply electricity to Line 7 and Line 2A on 2 December 2022. Around 120 million units is required to power both lines.[96][97] MMRDA plans to install solar panels on the roofs of 13 stations on Line 7 to generate 2,000 kW of power.[98]

Fare collection

[edit]

A consortium of Indian company Datamatics and Italian company AEP Ticketing solutions S.R.L was awarded a ₹160 crore (US$19 million) contract to implement the automated fare collection system for Line 7 and Line 2 in February 2019.[99][100][101]

From 1 May 2023, a 25% discount on ticket fare was implemented for senior citizens (over 65 years), disabled persons, and students up to Class 12.[102]

Foot overbridges

[edit]

The MMRDA plans to build 14 foot overbridges on Line 7 to enhance connectivity for commuters. The overbridges will be constructed in three phases.[103] The first foot overbridge at Gundavali station was completed on 29 November 2022.[104]

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[edit]
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