tender for estimate for repairs of pvd at bembla dam-item no.1:- cleaning by redrilling the vertical porous drain pipe including removing of leaching material, grout material if any inside of the v.p.d. etc complete with lifts etc. as directed. (vertical upward drilling) from 0 to 5 m. from 5 to 10 m. from 1 0 to 15 m. item no.2:-providing and fixing on walls/ ceiling/ floors, 50 mm dia heavy grade having embossed as isi mark galvanised iron pipes weight of 6.33 kilogram/ meter with necessary fittings. and remaking good the demolished portion and primer of anti corrossive oil paint 2 coats including necessary scaffolding and removing existing pipe line if necessary and conveying and stacking the same in pwd chowky or as directed etc. complete.