Figure 11:Mumbai Metro Network

4 U ND E R T A K I NG C O NS T R U CT I O N O F M E T R O L I NE 3 A S U ND E R G R O U ND :

In the previous Congress-NCP had decided to construct all metro lines underground but after delays and difficulties caused by acquiring land for Line 1 they altered the decision

However, Chief Minister Fadnavis believes that the two proposed lines can be constructed quicker and cheaper if they were elevated due to the proposed route of the alignment. The Government plans to implement all future metro lines (except Line 3) as elevated corridors. On 15 June 2015, the MMRDA announced that it would implement Line 2 of the metro in three parts. The Andheri-Dahisar line will have connectivity with the existing Line 1 and the proposed JVLR-Kanjurmarg line (Benchmark foe estimation of metro projects ,Ministry for urban and housing affairs).

Table 6: block estimate

Block estimate for underground: and Block estimate for elevated 6

Unit cost excluding taxes and duties at January, 2019 price level (Rs. in crore) Description Unit Unit cost Remarks Elevated section including station portion and ramp Underground Station Per (civil including Station 125 finishes) RKM 37 Separate provision should be made for special spans required crossing of river and lake

Underground tunnel by tunnel boring machine and cover method Elevated Station (Civil including Per finishes) excluding Station 26 viaduct in station portion RKM 125 Length of station box(es) of underground station(s) should be excluded while calculating 1.2 Section by Tunnel RKM 125 the length of UG section by TBM. Generally, Boring Machine underground ramp is constructed by cut and (TBM) and Cut & cover which is of very small length and is Cover clubbed with TBM/station work.

 Metro line 3 is the only metro line which provides full connectivity to the south

Mumbai , considering in mind that south Mumbai is a plush locality and also has many heritage structures , the marine drive the elevated line would create an obstruction to the view of the area .

6 Estimate based on metro policy

(2017)http://mohua.gov.in/upload/uploadfiles/files/Report%20on%20Benchmarking%20for%20Cost%20Estimation%20of%20Metro%20 Rail%20Projects.pdf 6 https://www.technoarete.org/common_abstract/special_pdf/special_34627.pdf

SUBMITTED BY: BHUMIKA RAJ UC5316 35