Mahananda River Pollution Abatement: Interception, Diversion, and Sewage Treatment Plant with 15-Year Operation in Siliguri

The KOLKATA METROPOLITAN DEVELOPMENT AUTHORITY (KMDA), a State Government and UT organization, is seeking comprehensive bids for Pollution Abatement Works for the River Mahananda at Siliguri Municipal Town, West Bengal. This vital project, identified under Tender ID 2026_KMDA_1039060_1 and Tender Reference Number KMDA/WS/GAP/SE,S/NIT-01/26-27, encompasses the implementation of an Interception and Diversion system with a Sewage Treatment Plant (STP). Notably, the scope includes a substantial 15-year Operation and Maintenance period, to be executed through a Hybrid Annuity Based Public-Private Partnership (PPP) mode, aligning with the objectives of the Namami Gange Mission-II. The estimated Tender Value stands at ₹1,27,99,00,000, with a required Earnest Money Deposit (EMD) of ₹2,54,00,000. This is an Open Tender process, with two covers for submission, and involves Item Rate as the Form of Contract. Prospective bidders are advised to note the critical dates, with Bid Submission commencing on September 1, 2026, at 05:00 PM and concluding on October 12, 2026, at 02:00 PM. Bid opening is scheduled for October 14, 2026, at 02:00 PM. Document download is available from September 1, 2026, at 05:00 PM until October 12, 2026, at 02:00 PM. A Pre-Bid Meeting will be held on September 9, 2026, at 02:00 PM at the Superintending Engineer's office, South Circle, GAP Wing, Water and Sanitation Sector, KMDA, Unnayan Bhavan, Salt Lake City, Kolkata. The works are situated in Siliguri, West Bengal, with a proposed Period of Work of 730 days. All pertinent tender documents, including the NIT, RFP, and BOQ, are available for download.