probable estimate for repair & renovation work of water supply pipeline at entire hospital section of haldia sub divisional hospital at basudevpur under ward no. 05 within haldia municipality ( the rate are based as per schedule of rates with latest revision for building works ( volume - i ) ( including materials, labour & carriage ) effective from 1stnovember 2017 & including 14th corrigenda effective from 08.03.2021 ) &the rate are based as per pwd ( w.b ) schedule of rates with latest revision for sanitary & plumbing works ( vol - ii ) ( including materials, labour & carriage ) effective from 1stnovember 2017