Public Works Department Tender

NSR2 - Providing & replacing damaged Cast Iron covers of size 300x 300 mm (wt 4.5 kg, for Gully trap) or 455x 610 mm (wt 23 kg, for M/H Cover) or of required size, to fit-in exactly inside the frame etc. complete. (NOTE:- CI Covers are to be replced with RCC Covers in general OR where CI Covers are usually stolen) ..(BWSSB 2023-24 I.no.18.5, Pg.no.221)

NSR1 - Cleaning of chocked sewer line by diesel running vehicle mounting hydraulic operated high pressure suction m3 jetting sewer cleaning machine fitted with pump having 4000 litres suction capacity and 6000 litres water jetting tank capacity including skilled operator, supervising engineer etc. for cleaning and partial desilting of manholes and dechocking of sewer lines. Dechocking and flushing of sewer line from one manhole to another by high pressure jetting system of 2200 PSI for sewer line from 150mm dia upto 300mm. (P.no.201, I.no.20.41, SR of 2023-24)

NSR3 - Constructing brick masonry chamber for underground C.I. inspection chamber and bends with bricks in cement mortar 1:4 (1 cement : 4 coarse sand) C.I. cover with frame (light duty) 455x610 mm internal dimensions, total weight of cover with frame to be not less than 38 kg (weight of cover 23 kg and weight of frame 15 kg), R.C.C. top slab with 1:1.5:3 mix (1 cement : 1.5 fine sand : 3 graded stone aggregate 20 mm nominal size), foundation concrete 1:5:10 (1 cement : 5 fine sand : 10 graded stone aggregate 40 mm nominal size), inside plastering 12 mm thick with cement mortar 1:3 (1 cement : 3 coarse sand), finished smooth with a floating coat of neat cement on walls and bed concrete etc. complete as per standard design: Inside dimensions 455x610 mm and 45 cm deep for single pipe line : With common burnt clay (non modular) bricks of class designation 3.5 (I.no.13.53, Pg.no.126, SR 2023-24)