Boring and Installation of one DTW at Malancha Kalubari LIS

Amount

Group - A : Boring & Installation of DTW :

Preparation of site for placement of the drilling rig including excavation of mud pit, circulation drain, collection chamber, etc. all complete as directed.

Movement of drilling rig, tool & plants, accessories including drill pipes, etc. to the drilling site & back all complete as directed.

Construction of temporary accommodation and low cost sanitary facility for drilling staff including cost of camp materials viz. cots, tables, chairs, utensils, dresses, safety helmets, etc. and dismantling the accommodation after completion of the work all complete as directed.

Boring of DTW of bore hole up to 600 mm dia. and up to a depth of 110 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, unconsolidated materials like clays, silts, sands, gravels, pebbles, cobbles and boulders) as per IS: 2800 (part-I) of 1991. Soil sample must be collected & kept properly at every 3.00 M interval of depth in boring. The job also include movement of Drilling Rig, tools & machineries, etc. by making temporary approach road to the working site all complete as directed.

Supply, Lowering & Installation in tube well 300 mm PVC housing pipe/blind pipe of wall thickness of 11.2 mm to 14.5 mm for casing assembly including supply of well cap, sockets, reducer, MS housing clamps, etc. as required as per IS : 12818-1997 of length 3.00 M of repute brand like Oriplast/Jindal/Prince, etc. all complete as directed. (Litholog Assembly diagram must be approved by Engineer-in-Charge of the work prior to installation)

Supply, Lowering & Installation in tube-well 200 mm PVC housing pipe/ blind pipe of wall thickness of 10 mm to 11.2 mm for casing assembly including supply of well cap, sockets, reducer, bail Plug, MS housing clamps, etc. as required as per IS : 12818-1997 of length 3.00 M of repute brand like Oriplast/Jindal/Prince, etc. all complete as directed. (Litholog Assembly diagram must be approved by Engineer-in-Charge of the work prior to installation)

Supply, Lowering & Installation in tube-well 200 mm PVC Ribbed Screen Filter pipe of wall thickness of 10 mm to 11.2 mm for casing assembly including supply of sockets, reducer, etc. as required as per IS : 12818-1997 of length 3.00 M/2.00 M of repute brand like Oriplast/Jindal/Prince, etc. all complete as directed. (Litholog Assembly diagram must be approved by Engineer-in-Charge of the work prior to installation)

Shrouding of the DTW assembly by river pea gravel of size 4 mm to 8 mm (required approx. quantityfor shrouding of the well = 42 m3), free from sand/dust and any other foreign materials after screening/stacking at site including supply of extra quantity of pea gravel (if any, that may be required depending on practical site condition) while developing the tube well including supply, transportation of all required materials, labour, etc. all complete as directed. (Work to be carried out as per IS: 4097 : 2008)

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 all complete as directed including furnishing of litholog/draw-down data, etc. as per IS:11185 of 1999. (For new DTW, minimum 72 hours of development is compulsory. The following data should be reflected in the report of development of the DTW : 1. Static water level 2. Drawdown at various discharge 3. Available average discharge

Supply, Fitting-fixing of 150 mm dia. Heavy duty CIDF Sluice valve inside screw, non-raising, vertical spindle type with hand wheel operation, need for 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 strictly 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 jointing materials and painting all complete as directed.

Supply, Fitting-fixing of 150 mm dia. 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 marked 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 all complete as directed.

Supply, fitting-fixing of delivery pipes of 150 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 all complete as directed.

Fitting-fixing of MS/GI bend of 150 mm dia. x 45º /90º /120º with GI/fabricated GI pipes with flange at both end and pipe jointing sets, including painting as per drawing & specification all complete as directed.

Supply, fitting-fixing of Surge Tank of size 900 mm dia. x 1250 mm long made of 4 mm MS plate with Raiser assembly of size 75 mm dia. x 6.0 M long and S-bend of size 200 mm x 1600 mmL made of 4 mm MS plate including painting the above with one coat of synthetic enamel primer followed by 2 (two) coats of successive synthetic enamel/ bituminous black paint and made provision for mounting the surge tank on a specified CC foundation by nuts & bolts of suitable size as per drawing & specification all complete as directed.

Installation, testing & commissioning of 20 H.P Submersible Pump Set and assembly and making M.S angle joints for 150 mm dia. M.S.Column Pipes with three pairs of clamp made of ISA50 MS Angle to be welded on column pipe on each joint as directed making supply of three nos. of nuts & bolts of size 16 mm dia. X 250 mm long at site includingsupply of PVC insulated copper cable, motor cable (flat cable) of required length and all necessary items as required for the job including all complete as directed. (20 H.P Submersible Pump Set will be supplied by the Department)

SAPNA BEGUM