Sinking of tube well for submersible pump for staff quarter at Malda District Correctional Home Under Malda Division ,P.W.D

(i) 80 mm dia. boring etc.

(ii) 150 mm dia. boring etc. top enlargement

150Mm dia

80 Mm dia

Supplying PVC strainer of approved make with adapter conforming to I.S.12818 specifications. i) 80 MM dia

Supplying, fitting and fixing heavy type bell mouth reducing socket. i) 75 MM x 150 MM

Supplying, fitting and fixing plug of approved make conforming to I.S. specifications. 75MM Dia

Packing the annular space between the outside of the tube well pipes & strainers and the bore with pea size washed gravel of approved quality having size from 2 mm to 5 mm or the size approved by the Engineer-incharge including cost of all materials labour and equipment complete. cu. m. 2029.00 Note: Initial 6 m. of Annular space between the housing pipe and the bore should not be shrouded with Pea size gravel to avoid contamination with surface water.

Packing annular space between the outside of the housing pipe and the bore with puddled clay balls of approved size as per direction of the Engineer-in-charge with cost of all materials and labour complete.

Washing and developing tube well with air compressor pump and engine for 8 (eight) hours continuous pumping per day with necessary arrangements for testing the yield in gallons per hour with 'V' notch including hire and labour charges for all tools and plants and scaffolding as required.

Add GST @18 %

Add Labour Welfare Cess @1%

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