Construction of Machine Drilled Deep Borewell at Horticulture Nursury Zangam Pattan

Boring/Drilling of 200mm diameter bore of required dia for casing /stainer pipe by suitable method prescribed in IS : 2800 ( part 1), including collecting samples from different strata, preparing and submitting strata chart/ bore log including higher & running charges of all equipment tools, plants and machines required for the job, all complete as per direction of Engineer –in-charge up to desired depth(all types of soil). The job includes Supplying ,assembling , lowering and fixing in vertical position in bore well ,PVC casing pipes of 125mm dia, of reputed and of approved brand and manufacture including required hire and labour charges all complete for all depth as per direction of Engineer-in –charge .Development of tube well with backwash method with air compressorofminimumcapacity1000CFM(300PSIairdelivery system)withsuitablearrangements till well is thoroughly developed in all respects as per the direction of in charge Engineer

P/l of rectangularcementconcreteofsize1.5m*1.5mand0.3 deep in a mix of 1:2:4 using 20 mm nominal aggregate and coarse sand to give adequate strength adequate the strength to act as a sanitary for the well and to grout the land pump assembly in order to make it robust to resist shock load observed while pumping. In case the suitable space of the above specification is not available the surface area is to be adjusted accordingly. 1.5*1.5 * 0.3 = 0.67 cum And water reservoir for distributing water through channels 4*1.50*0.30*0.75 = 1.35 cum

Cement plaster with a floating coat of neat 12mm cement plaster on reservoir wall and bottom using fine sand 4*0.90*0.75 = 2.70 0.90*0.90 = 0.81

Electricalwork

Harnessing of tube well by providing and installation of following electro mechanical equipment of standard quality. 01:- Submersible pump motor single phase 3 HP with motor control panel having 7 HP delta starter fitted with MCCB etc. All the equipment should be of standard quality and ISI mark supplied from standard manufacturer like KBS Crompton, Kirloskar 02:- 50 mm diameter GI riser pipe along with elbows , nipples , sockets , reducers whatever required at the site of work 80mtr , 4sq( mm) submersible cable 85mtr

P/F of 50mm dia MS holding clamp out of 10mm thick MS plate.

Gravel packing in Borewell construction in accordance with IS 4097 including providing gravel fine/Medium/Course in required grading and size as per actual requirement all components as per direction of engineer in charge.

Contingencies