In mid-January, West Bengal’s state government and Metro Railway Kolkata invited bids for assigning a contractor to conduct surveys, geo-technical soil investigation and prepare designs for a 3.6 km underground extension of Kolkata Metro’s 6.87 km Line-4 from Netaji Subhas Chandra Bose International Airport (NSCBI) to New Barrackpore.
This preliminary work for developing the line’s detailed design is among the first few steps that have to be taken prior to the start of tendering for civil construction.
Tender No: Civil-2318-2020 – Execution of preliminary works for survey, geo technical investigation, preparation of conceptual design, tender drawings, architectural drawings, preparing of DBR, tender documents for EPC including specifications and schedule of bill of quantity (BOQ) with rates and rate analysis etc. detail design & drawing of subway & dispersal and proof checking of detail design & drawing for underground construction of double line, multiple line and station building by cut and cover method, beyond Bimanbandar yard to New Barrackpore ch 7100 to ch 10700m in connection with extension of Metro Railway from Noapara to Barasat via Bimanbandar (Airport)
• Estimated value: Rs 5.09 cr
• Last Date for submission: 18 Feb 2020
This 3.6 km underground section will be built using the cut-cover method (no tunnel boring machines will be deployed) and consist of 3 new stations at Birati, Michael Nagar and New Barrackpore.
This line was originally planned as an elevated extension, but was converted after the objection from the Airports Authority of India (AAI) due to its proximity to the airport’s facilities which include fuel storage tanks. Post conversion, in December 2018, the Railways Board sanctioned Rs 1622 crore towards its construction.
The remaining 7.55 km portion of Line-4 from New Barrackpore to Barasat is planned to be built overhead, which will require the removal of about 2000 encroachments en-route. Back in 2011, Larsen & Toubro had won a Rs 280-crore contract to construct a 5 km portion but couldn’t begin work as there wasn’t a clear right-of-way available.
For more updates, check out the Kolkata section of The Metro Rail Guy!