construction of roads, providing water supply and sewerage and swd scheme for development of 1 marla plots under mukhya mantri sheheri aawas yojna (mmsay) in sector-b-1, charkhi dadri (deposit work). “supply, laying and compaction of earth, 200mm thick gsb, 225mm thick wmm, 50mm thick dbm, 30mm thick bc, primer and tack coat, providing and laying of 100mm, 150mm, 250mm dia di water supply pipeline, 200mm, 250mm dia sw pipe sewer pipelines, construction of dmc storm water drain, road gullies including construction of manholes and lampholes in sector-b1, charkhi dadri and all other works contingent thereto” (including three years maintenance and defect liability period free of cost).a/c