tender for annual maintenance dredging of csl / isrf using grab dredger and disposal to outer sea using barges; dredging of quayside and channel at csl and isrf areas as per the dredging plan (annexure-17 & 18) to lines/ levels/ slopes using grab dredger (clam shell bucket) and disposing the dredged materials to outer sea in disposal areas specified by copa (approx. 24 to 25 kms) using sea going type self propelled hopper barges of suitable capacity and numbers including cost / hire charges of grab dredger, barges, other equipments, all plants, fuel, labour, boats, crafts etc. its mobilisation, demobilisation, supervision, maintenance, overheads and profits, shifting from and to from csl and isrf as per requirements and all other incidentals etc. complete as per the specification and direction of the engineer-in-charge. the depth to be obtained is 4.5 - 7.0m below chart datum using echo as per the areas specified (excluding gst).