Drainage System Repair and Maintenance Services

This tender, under Bid Number GEM/2026/B/8207742, issued by the Department of Defence through the Dg Of Defence Estate in Patna, Ministry Of Defence, seeks proposals for the essential "REPAIR AND MAINTENANCE OF DRAINAGE SYSTEM". The scope of work, commencing on 27-10-2026 at 6:36 PM and concluding on 17-11-2026 at 5:00 PM, encompasses a comprehensive range of civil engineering activities. Key among these are earthwork excavation for foundation trenches and drains in all soil types to precise specifications, along with the provision and filling of clean sand under foundation beds for uniform spreading, watering, and consolidation. The tender also calls for the provision and laying of cement concrete, specifically Type D2 (1:4:8 nominal mix with 40mm graded aggregate) for surface channel drains, and Type B1 (1:2:4 nominal mix with 20mm graded aggregate) for drain base foundations and 150mm thick drain side walls. Furthermore, the scope includes the provision and laying of high-yield deformed steel reinforcement, cut and prepared as required, and the meticulous provision and removal of formwork for both faces of RCC drain side walls and the soffit of RCC cover slabs, including all necessary supports and bracing. The project also specifies the provision and laying of sub-class B bricks laid flat for floors. The total estimated quantity for these works is 23,400 units.