This tender issued by the Lyari Development Authority in Karachi focuses on the rehabilitation and upgradation of water supply lines using MS pipes of various diameters ranging from 4 to 28 inches. The project covers multiple localities including Yousif Goth, Abdul Raheem Goth, Siddique Goth, and Nasri Goth in Gadap Town and Surjani West. The scope includes excavation, laying, jointing, welding, and testing of MS pipes conforming to API 5L grade X-42 ERW standards with internal cement lining and external LPE coating. The works also involve installation of air valves, sluice valves, MS bends, split collar tees, chambers, and refilling of trenches with proper compaction. The site is located in Karachi, Sindh, and the project is funded by the Local Government of Sindh under ADP#1738. The contractor must be registered with the Pakistan Engineering Council in category C-4 or above and possess valid tax registrations including NTN and Sindh Revenue Board certificates. The contractor should have relevant experience and financial turnover as per SPPRA guidelines. The contract duration is 730 days (24 months) from the date of commencement. The contractor is required to provide a performance security of 5% of the contract price and comply with insurance requirements including contractor's equipment, third party injury, and workers' compensation. Mobilization advance is not provided under this contract. Bidders should submit a detailed construction schedule, method statement, list of major equipment, and organization chart for supervisory staff. The bid validity period is 90 days, and bids must be submitted in English. The submission deadline is **July 4, 2024** at 23:59:59, with bid opening to follow as per the procuring agency's schedule. The physical address for submission is the Lyari Development Authority office at Plot No. 194-B, Block-B, SMCHS, Karachi. Pro-Tip: Ensure your bid documents include all mandatory certificates and affidavits on Rs.100 stamp paper, especially the non-blacklisting affidavit and litigation history. Also, carefully check the bid amount rounding as per the High Court order to avoid disqualification. Pay close attention to the bid security format and validity period to avoid rejection. Visit the site beforehand to understand the terrain and logistical challenges for pipe laying and excavation.