tender for construction and commissioning of 125 mm dia. bore by dth/rotary/ combination rig, including supply and installation of hand pump set and other allied works with defect liability period under phed sub div. nawa. - 1 construction of tube well up to 100 mtr. depthin all type of rocks by dth system & over burden to accommodate casing pipe of following sizes in all types of soils & over burden including lowering of casing pipes, (if required) excluding cost of casing pipes, as per is:2800 part 1: 1991 andis:2800 part ii: 1979 (both amended up to date) and technical specifications. the work would be completed after obtaining sand free water. the tube well should have a through out bore as per nominal dia of casing pipe. 2 nominal bore 125 mm dia 3 add 15% extra on above item for drilling depth beyond 100 mtr, if depth of bore is more than 100 mtr. 4 construction of tube well from ground level & up to 100 mtr depth to accommodate housing and assembly pipe of following sizes in all type of alluvium strataunconsolidated formation such as pebbles, boulders etc. by percussion/rotary drilling method as per is:2800 part 1: 1991 andis:2800 part ii: 1979 (both amended up to date) and technical specifications, with gravel as per is:4097-1967 and its packing as per is: 2800 (part i & ii) 1979 as amended up to date (the work includes the cost of gravel & its primary packing and packing during development, lowering of housing & strainer assembly pipes with supply and wrapping of coir-rope, wherever necessary for arresting fine sand particles and development work, but excluding the cost of housing and strainer pipe assembly). the work would be completed after obtaining sand free water. 5 nominal bore 125 mm dia 6 add 15% extra on above item for drilling depth beyond 100 mtr, if depth of bore is more than 100 mtr. 7 construciton of tube well from ground level and upto 100 mtr. depth and above of following sizes in all type of soils in alluvium strata, unconsolidated formation such as pebbles, boulders etc, by bailing method and withou gravel packing as per is : 2800 part i : 1991 and is : 2800 part ii : 1979 (both amended upto date) and technical specifications. the work includes formation of cavity at bottom by development with appropriate air compressor or bailer pumping and also lowering of casing pipe but excluding cost of the casing pipe. the tube well should have a throughout bore as per nominal dia of casing pipe. the work would be completed ater obtaining sand free water. 8 nominal bore 125 mm dia 9 labour charges for making slots on blank pipes made of ms black pipe of size 125 mm dia nominal bore, the slotting should be as per is : 8110-1985. 10 supply of erw ms black casing pipe isi marked as per is : 1239 (part i : 2004) or amended up to date of 125 mm dia nb (thickness of pipe 4.8 mm & mass of tube 16.40 kg/m) 11 construction of 185 cm. dia platform as per approved design & drawing of unicef. 12 supply and installation of isi marked india mark iihand pump set complete with cylinder & 15 connecting rods. 13 supply and installation of isi marked india mark ii hand pump sets extra deep well (edw) complete with cylinder & connecting rods. 14 edwhp + 20 connecting rod. 15 edwhp + 23 connecting rod + 1 weight. 16 edwhp + 26 connecting rod + 2 weight. 17 edwhp + 30 connecting rod + 3 weight. 18 supply & installation of gi pipe 32 mm medium class b with pipe sockets (heavy duty) 19 supply and installation of isi mark connecting rod as per departmental specifications of 3 meter length 20 installation of india mark ii / iii ed i and ii hand pump set complete on existing platform