Dr.NTTPS-Removal of under water silt / slush / sand/ash and snails from the main sump, CW pump chambers and Common auxiliary pump chambers of Stage-II & III CW pump house during the year 2026-27 upto 30.09.2026

Removal of silt or silt mixed with sand in slussy condition.snails and ash under the water using diesel engine boat using desilting pump from +EL 8.00m to +EL 23.50 m and collected in the forming ponding arrangement at +EL 23.50m with sand bags including disposing off the same to the low laying areas with a lead of 2km with crew charges, hire charges of machinery, fuel charges and all leads and lifts etc complete for finished item of work as directed by the Engineer-in-charge.

Removal of silt,slush and ash accumulated in the common pump chambers of auxillary pumps and CW Pump Chambers by engaging divers, swimmers etc., including collection of above silt and slush and all other materials discharges through discharge pipe by air lift system on to (+)19.0M El. Floor including formation of silt traps(ponds) with sand bags for settlement and conveying the same to the ground level i.e.(+)23.0M El. With the help pf buckets and iron pans (gamalas) and transporting the same to the stack yard with in 1KM lead with all incidental charges, labour, tools and tackles required for carrying out above operation are to be arranged by the contractor at his own cost. (Payment will be made based on the joint stack measurements at ground level before transporting.)complete for finished item of work as directed by the Engineer in Charge.

Hire charges for Air compressor 5 cmm (electric) for under water diving operations like collection of snails,silt slush,ash and other foreign matter deposited on the bed of the CW Pump Chambers etc., complete for finished item of work as directed by the Engineer in Charge.