operation, maintenance and repairing of 26.00 mld w.t.p./ civil structures of bk-4 ph 2b water supply scheme in all respect i.e. all the components executed under the 26.00 mld w.t.p./ civil structures etc. including establishment charges and all equipment`s / materials / labour for repairing of pipeline and other civil works as per detailed specification and obligatory requirement for 24 months including supply of water to each head works, sub-head works including satisfactory maintaining the r