water supply pumping main pipeline work at maithanam oht to skr park oht and keeraithotta street oht in keelapavoor town panchayat; 1 dismantling the existing bt surface including all cost and conveyance etc., complete. 2 dismantling the existing cc surface including all cost and conveyance etc., complete. 3 earth work excavation with an initial lead and lift in hard stiff clay, black cotton, hard red earth, sub murram gravel, stone and earth mixed boulders as per ss20b for pipe laying work. 4 supply and delivery of gi and pvc pipes and specials etc., complete. 5 90mm 6ksc pvc pipe 6 90mm 4ksc pvc pipe 7 80mm gm gatevalve 8 80mm gi elbow 9 80mm gi pipe 10 80mm gi flangeset 11 90mm 6ksc pvc bend 12 90mm 6ksc pvc tee 13 90mm pvc mta 14 90mm pvc endcap 15 90mm 4ksc pvc tee 16 90mm 4ksc pvc bend 17 lowering pvc/ dwsc rigid pipes and specials to trench and laying to proper grade and alignment, jointing with pvc couplers with cement paste. 18 90mm to 110mm dia (od) pvc pipe 19 refilling with trench including all cost of materials and all labour charges etc., complete. 20 cement concrete 1:4:8 mix using 40mm iss hbg metal including all cost and conveyance and all labour charges etc., complete 21 cement concrete 1:2:4 mix using 20mm iss hbg metal including all cost and conveyance and all labour charges etc., complete