Installation of 2 Points Solar Powered MDTW scheme at Urol and 1 Point at Durung under Dimoria LAC under RIDF-XXX NABARD for the year 2024-25under Dispur Division Package_39

Item No. 1 : Movement of drilling Rig , Tools & Plants, Accessories including drill pipes, casing pipes etc. to drilling site and back.

Item No. 2 : Boring of DTW of bore hole up to 450mm dia and up to a depth of 70 M or up to required depth by RC/DR Drilling Rig including supply and transportation of all required tools & Plants, materials & labour to site to perform the job in complete as directed in alluvium areas ( means areas where the strata comprises of loose, unconsiolidated materials like clays, silts, sands gravels, pebbles, cobbles and boulders) as per IS:2800 (part-1) of 1991. ( soil sample must be collected & keep properly at every 3.00 M interval of depth in boring. The job also include movement of rig by making temporary approach road etc. to the field up to distance of 1000M)

Item No. 3 :Supply, lowering & installation in tube well 200mm PVC housing pipe / blind pipe of wall thickness of 10.0 mm to 11.2 mm for casing assembly including supply of well cap, sockets, reducer, MS housing clamps etc. as required as per IS : 12818-1992 of length 3.00 M/2.00 M of repute brand like Supreme / Oriplast / Jindal / Prince etc. and as directed. ( Litholog Assembly diagram must be approved by Engineer-in-Charge of the work prior to installation)

Item No. 4 : Supply, lowering & installation in tube well 200mm PVC Ribbed Screen Filter pipe of wall thickness of 10.0 mm to 11.2 mm for casing assembly including supply of sockets, reducer etc. as required as per IS : 12818-1992 of length 3.00 M/2.00 M of repute brand like Supreme / Oriplast / Jindal / Prince etc. and as directed. ( Litholog Assembly diagram must be approved by Engineer-in-Charge of the work prior to installation)

Item No. 5 : Shrouding the DTW assembly by river pea gravel of size 4 mm to 8 mm free from sand / dust and any other foreign materials after screening / stacking at site including supply, transportation, labour etc. complete as directed.

Item No. 6 : Developing the tube well assembly by Air-Compressor of capacity 8-12 kg/cm2 and CFM=450 M3/min so as to get sand free discharge of water with supply of all required materials at site complete as directed including furnishing of litho-log / draw down data etc. as per IS : 11185 of 1999. ( For new DTW minimum 72 hours development is compulsory. Additional pea gravel required if any, during development would be extra )

Item No.7: Supply, fitting-fixing of Heavy duty CIDF sluice valve inside screw, non raising, vertical spindle type with hand wheel operation need of water purpose. The rotation of closing should be counter clock wise. The holes of the flange should be drilled as per BSS No. 10 , Part-I, Table-D. All materials construction and components should strickly conform to IS : 14846-2000 and having marked with manufacturers name and trade mark in the delivery pipe layout as directed / as per drawing along with HD GI flange, pipe joining materials and painting in complete as directed. (i) 100mm dia

Item No. 8 : Supply, fitting-fixing of Heavy duty CIDF Reflex valve, swing check type with bypass arrangement, horizontal operating. The holes of the flange to be as per BSS No. 10, Part-I, Table-D and the material, construction and all components should strictly conform to IS : 5312 (Part-I)-2004 and having arked with manufacturers name and trade mark in the delivery pipe layout as directed / as per drawing along with HD GI flange, pipe jointing set and painting in complete as directed. Rate as per Annexure-IV & DPC,Mech 2019-20. (i) 100mm dia

Item No. 9 : Supply, fitting-fixing of delivery pipes of 80/100 mm dia GI / fabricated GI pipes ( HD of repute brand with ISI marked) with flange at both end / wherever required with pipe jointing sets, including painting in complete as per drawing / specification including temporary pipe support as required and as directed.