tender for cleaning of silt from 200m dia to 500 dia sw sewer lines including manholes by bucket type sewer cleaning machine and providing and fixing of steel fibre reinforced concrete manhole cover with frames at all blocks of urban estate, jind.cleaning of silt/de-silting from sewer lines from 200mm i/d to 500mm i/d including manholes by bucket type sewer cleaning machine and disposal of same from outside the residential area providing and fixing of steel fibre reinforced concrete manhole cover with frames at various points in all blocks of urban estate, jind and all other works contingent thereto(including one year maintenance defect liability period free of cost).