HCC to complete Maroshi-Ruparel water tunnel soon
HCC said it has achieved a major breakthrough by day lighting the second section of the 12.24 km Maroshi-Ruparel water tunnel near Mahim. With this, now only 1.8 km stretch need to finish over next couple of months to complete the entire section of the Maroshi-Ruparel water tunnel. This tunnel will replace the existing Vaitarana, Tansa (East) and Tansa (West) main surface pipelines.
The tunnel stretch is divided into three sections namely, Maroshi-Vakola (5.83 km long), Vakola-Mahim (4.55 km long) and Mahim-Ruparel College (1.86 km long). The company said the Maroshi-Vakola section day lighting was achieved in October 2009 and the concrete lining of this section is almost completed. The next section of Vakola-Mahim section will be taken up for concrete lining immediately and the entire project will be completed in September 2012 as per the schedule.
The Vakola-Mahim section passes below the Mahim creek while Maroshi-Vakola section passes through Mumbai Airport and crosses both the Runways of Mumbai Airport at around 70 meters below the ground level.
HCC was awarded the Contract of Maroshi-Ruparel College Tunnel Project by the Municipal Corporation of Brihan Mumbai in September 2007 with a contract value of Rs415.10 crore. The water supply project is being executed under Jawaharlal Nehru National Urban Renewal Mission (JNNURM) and is funded by The Government of India, Government of Maharashtra and Municipal Corporation of Greater Mumbai.
The Maroshi-Ruparel tunnel work consists of construction of tunnel having 3.60 m diameter and 12.24 km long using Tunnel Boring Machine from Maroshi connecting to Ruparel College. The tunnel is connected with shafts at Maroshi, Vakola and Mahim. The shafts are 10 m in diameter and about 80.00 m deep.
This project is part of the rehabilitation and improvement of the drinking water conveyance / distribution system from Bhandup Treatment Works to Western Suburbs and Southwest part of the Mumbai city which consists of Vaitarana, Upper Vaitarana, Bhandup, Maroshi, Tansa (East) and Tansa (West) main pipelines. Bhandup-Maroshi main pipeline runs up to Maroshi only and supplies water to the Veravali Group of Reservoirs. Other mains continue to carry water to Dharavi / Mahim and further.
HCC has constructed 21 kms of existing 26 kms water tunnels that supply drinking water to Mumbai and is currently constructing 12 kms of tunnels of the 23 kms of water tunnels under construction. The Bhandup Complex to Charkop tunnel of 12 km length was the last tunnel completed by HCC.