Northern Railway invites open e-tenders for the maintenance of bio-toilets tanks during POH attention of coaches at Kalka Workshop. The project carries an estimated contract valuation of ₹1,74,790.56 with a target completion period of 24 months. Interested contractors must deposit an earnest money amount of ₹35,000.00 along with their technical bids. The final closing date and time for submission of the online tender forms is August 7, 2026, till 3:00 PM. All mandatory documents and updates can be reviewed on the digital procurement portal www.ireps.gov.in.