annual maintenance estimate along the alignment of 250 mm dia ciss pipe main from thokchu to delo civil lake no. 1 (27 km stretch approx) and boosting source lali kharga to thokchu along the alignment of 100 mm dia pvc pipe main 3.90 km stretch appro , non scheduled items , clearing of mud ,bushes, tree parts, boulders from the work site for repair work to 10 dia. pipe main by engaging labourers. [ labourers 5 nos x 30 days @ rs. 500/day- rs 75000.00] , engaging labourers for removal of tree parts ,bushes ,boulders in the event of natural calamity,[9x30 days@rs. 500/day=rs. 135000.00] , engaging labourers for handling of 250 mm &100 mm dia .pipe main in the event of damages by falling boulders, tree ,tree parts etc,[7x365/4days @ rs. 500/day=rs. 319375.00] , carriage of materials by pick up vehicle from kalimppong to nearest unloading point. , carriage of materials by head load to work site including loading/ unloading [engaging labourers 5 nos x16 days @rs. 500/day= rs. 40000.00 , supplying ,fitting ,fixing of lead wool to repair damaged lead caulked joints of the pipes. , supplying ,fitting ,fixing of jute yarn to repair damaged lead caulked joints of the pipes. , 15% contractorsprofit , scheduled items , supply of pvc pipes & fitting schedule 80 (medium duty) conforming ro astmd-1785 and thresded to match withgipipes .pipes as per is: 1239( part 1). (a) pvc pipes. i) 300 mm dia. , ii)100 mm dia. , sub total (1+2) , add gst @ 18% , sub total , add cess @ 1%