Container Corporation of India Limited invites online bids through open e-tender (single bid system) for a Zonal Annual Maintenance Contract for services related to substations and electrical installations at DRT, JNPT, Turbhe, MRO, and CONCOR flats in the Western Region (Mumbai). The estimated project cost is ₹1,62,57,662 (inclusive of GST). The tender document fee is ₹1,120 and the processing fee is ₹3,540, both non-refundable. The earnest money deposit (EMD) is ₹3,65,154, payable through e-payment. The tender document is available for download from 20 June 2026 and the last date for submission is 10 July 2026 up to 14:00 hrs. The bid opening is scheduled on 10 July 2026 at 15:00 hrs. Documents can be accessed via the official e-procurement portal and CONCOR website.