This tender from Karachi Water and Sewerage Corporation, Karachi Division Civil-1, invites bids for the construction of an underground tank in Masjid Haq located at Single Story 9th Mile Karsaz Staff Colony, Karachi. The project falls under the construction and civil works category and involves excavation, concrete work, reinforcement, and pipe laying. The site requires careful handling of soft and hard soil excavation, precise alignment, and structural concrete work including brickwork and steel reinforcement. The scope includes excavation for tank and reservoir, concrete brick or stone ballast work, reinforcement cement concrete, and laying of HDPE pipes. The engineering challenges include ensuring proper soil compaction, structural integrity of the tank, and adherence to design specifications for water storage. The location in Karachi demands consideration of urban infrastructure and traffic management during execution. Bidders must have valid registration with Sindh Revenue Board (SRB) and Federal Board of Revenue (FBR), along with GST certificates where applicable. PEC registration is mandatory for the financial year 2025-26. The tender requires submission of technical and financial bids with Earnest Money in the form of Pay Order or Demand Draft. Experience in similar works with a minimum of 80% cost executed is essential. Financial statements and tax returns for the last three years must be provided. The submission deadline is set for 23rd February 2026 at 11:00 AM, with bid opening at 11:30 AM on the same day at the Office of the Accounts Officer (Sewerage), Room No. 12-A, First Floor, Block-C, 9th Mile Karsaz, Karachi. Bids must be submitted online via the EPADS portal of SPPRA Sindh. Pro-Tip: Ensure your bid security and Earnest Money are prepared exactly as per the NIT requirements and uploaded on EPADS portal timely. Missing the specific stamp duty or incorrect bid security format often leads to disqualification, so double-check these details before submission.