Mumbai, April 11 -- The Mumbai Metropolitan Region Development Authority (MMRDA) will float a tender next week for construction of Metro line 10, which will connect Gaimukh on Ghodbunder Road with Shivaji Chowk in Mira Road, transport minister Pratap Sarnaik said on Friday after meeting MMRDA officials. "With the tender being floated next week, groundwork should commence in six months," the transport minister said. "The project will cost Rs.8,536 crore, and the deadline completion is 2029." The development comes barely a fortnight after a portion of the Metro 9 corridor was thrown open to the public. To facilitate work on the Metro 10 corridor and ease traffic snarls, a portion of Ghodbunder Road will be widened from 30 metres to 60 metres, as per directions issued by chief minister Devendra Fadnavis and deputy chief minister Eknath Shinde, Sarnaik said. The MMRDA will widen the road at a cost of around Rs.1,400 crore - Rs.1,200 crore towards capital expenditure and Rs.200 crore towards administrative costs. According to the detailed project report (DPR) for the Metro 10 corridor prepared in March 2019, the 9.209-km route will have four elevated stations; 8.414 km will be elevated, 0.68 km underground and 0.115 km at ground level. Mogharpada will serve as the car depot for the proposed line. The line will also function as an extension of the existing Metro 4 (Wadala-Kasarvadavali) and 4A (Kasarvadavali-Gaimukh) as well as the proposed Metro 11 (Wadala-Gateway of India). All four metro lines are coded 'green'. One of the alternatives proposed in the DPR is to operate a continuous route from south Mumbai to Shivaji Chowk in Mira Road. But with the state planning to extend Metro 11 till Gateway of India at the southern end and Bandra Terminus at the northern side, contiguous metro services may be available from Wadala to Shivaji Chowk, thereby making it a 43.3-km line. Apart from the proposed metro, work is underway on the Thane-Borivali twin tunnel, with the first of four tunnel boring machines being launched on April 7....