improvement of passage and drainage system near tulsi coconut mart shop improvement of passage and drainage system near tulsi coconut mart shop in dharavi beat no. 188 g/north ward - removing old flooring etc. 2 excavation in cc 3 excavation in earthwork 4 demolishing brick work 5 p/f of half round channel of 250 mm dia 6 brick masonary for open drain 7 p/l cement plaster 20mm thick. 8 p/f r.c.c. cover 9 r/f g.i pipe of pipes of any size 10 p/l 1:3:6 cc.bedding 11 p/l 25 to 30 mm rough shahabad ladi 12 p/l nominal mix 1:2:4 cc 13 p/f 110 mm pvc pipe 14 p/f 20mm g.i. pipe..etc. 15 p/f 25mm dia g.i. pipe etc.. 16 p/l 250mm sw pipe...etc. 17 p/l 1:4:8 c.c encasement...etc. 18 p/f m.s. frame & r.c.c cover....etc. 19 const. b.m.chamber ....etc. 20 extra additional depth of chamber..etc.