execution of civil engineering works & maintenance (housekeeping) of office/site camp & officers rest house at silchar, bairabi & kawnpui including gardening, supplying & planting seasonal flower plants & other plants, operating and maintenance of railway dg set and lifts in office/camp office and other premises & other ancillary works under dy.ce/con-i & ii/bhrb at scl for a period of 2 (two) years in connection with construction of bhairabi-sairang new bg line project.