KOLKATA (Metro Rail News): Senbo Engineering and ITD Cementation India last week emerged as the lowest bidders for a 3.6 km underground extension of Kolkata Metro’s 6.87 km Line-4 from Kolkata Airport (Bimanbandar) to New Barrackpore.
This underground section of the 18.13 km Yellow Line will help in due course linking Noapara with the suburb of Barasat in north-east Kolkata. The construction for this line will be carried out using the Cut & Cover method which means no TBMs will be used. Its alignment will primarily run along with Netaji Subhas Chandra Bose International Airport (NSCBI)’s land and includes 2 new stations at Birati and New Barrackpore.
Metro Railway Kolkata had invited tenders in January 2022 in 3 packages which were 2 for tunnelling works and 1 for subway work linking the airport’s terminal.
Package 2
This package includes a 1.045 km C&C tunnel and Birati Station’s construction.
Kolkata Metro’s Estimate for this package was: Rs 286.33 crore
Financial Bid Values:
| Firm | Bid (Rs. Crore) |
| Senbo Engineering | 299.76 |
| ITD Cementation | 307.78 |
| SAM India | 311.72 |
The scope of this package includes execution of civil engineering works for construction of underground rcc box tunnel including station building (birati) using diaphragm wall h-pile plunge pile etc and allied works from Ch 8.795 to 9.840 km by cut & cover method (top-down) for two tracks/ multiple tracks in connection with extension of Metro Railway from Noapara to Barasat via Bimanbandar in West Bengal.
Package 3
This package includes a 0.74 km C&C tunnel and New Barrackpore Station’s construction.
Kolkata Metro’s Estimate for this package was: Rs 222.58 crore
Financial Bid Values:
| Firm | Bid (Rs. Crore) |
| Senbo Engineering | 232.23 |
| ITD Cementation | 244.02 |
| SAM India | 244.49 |
The scope of this package includes execution of civil engineering works for construction of underground rcc box tunnel including station building (new Barrackpore) using diaphragm wall h-pile plunge pile etc and allied works from Ch 9.840 to 10.580 km by cut & cover Method (top down) for two tracks/ multiple tracks in connection with extension of Metro Railway from Noapara to Barasat via Bimanbandar in West Bengal.
Subway Package
Kolkata Metro’s Estimate for this subway package was: Rs. 48.31 crore
Financial Bid Values:
| Firm | Bid (Rs. Crore) |
| ITD Cementation | 47.36 |
| Senbo Engineering | 50.53 |
The scope of this package includes execution of civil engineering works for construction of underground rcc box subway, dispersals (entry/ exit facility) and allied works to provide subway connectivity from underground Bimanbandar Station to Terminal Building of NSCBI, Airport (Airport Portion), including finishing, fire suppression & other allied works in connection with the extension of Metro Railway from Noapara to Barasat via Bimanbandar in West Bengal.
