Construction of 125mm dia Machine Drilled Bore Well along-with Electro Mechanical Works required to lift the water from Bore Well upto Water Storage Tank at Government Degree College Kralpora.

Drilling/Boring of 125 mm diameter tube well by air rotary drilling rig unit suitable for lowering of MS casing of 125mm diameter in suitably drilled bore hole as per specifications laid down in IS 2800 (Part-I &II) with up to date amendments. The job is to be done in all kinds of soils, boulder, rocks, collapsible strata, saturated soils, artisan conditions by ODEX/DTH attachments and exploration of ground water by tapping sufficient aquifer zones. The job includes the cost of shifting of drilling machine, loading, unloading of accessories, tools, bits, casing shoe, consumables like fuel, lubricants, skilled and unskilled labours and other unforeseen items. Development of tube well with backwash method with air compressor of minimum capacity 1000 CFM (300 PSI air delivery system) with suitable arrangements till well is thoroughly developed in all respects as per the directions of site engineer.

Supply, Providing, Fitting, assembling in vertical position in above drilled bore of Mild Steel plain and beveled ended 125mm dia. (Class B) as per IS 4270 Casing pipes and subsequent lowering of casing assembly and its welding after every 10 feet, up to the drilled/desired depth. The whole casing pipe is inclusive of slotted pipe/ flushed, which is to be used as per the site requirement and as directed by site engineer. The pipe shall be lowered up to the desired level BGL. The average length of each pipe shall not exceed 3.00 Mts. The welding electrodes used for welding the pipe shall confirm to relevant IS codes. The specifications of the tube well shall be as per IS 2800 part I&II

Harnessing and yield test of the tube well by way of Shifting all the men and machinery at site, carriage, loading, un loading, hire charges of DG set, submersible pumping unit, Tripod for lowering of pumping unit along with column pipes, starter, cable, tools and accessories and skilled labours and harnessed in accordance with IS:2800 (Part-I &II) to establish maximum rate of usable water yield without sand contents and without any other chemical contents by using submersible pumping unit. The pumping operation of well shall be continued till the measuring yield is achieved not less then 1000 LPH by step draw down method and turbidity level comes below 5 NTU and collecting the water sample and shall be tested in central laboratory, all complete.

Providing and laying of cement block of size 4'x4' and 1 feet deep in a mix of 1:3: 6 to adequate the strength to act as sanitary block for the well. The block comprises mud mat of 4 inch height and then laying of 8 inch cement concrete. and Providing and Laying of cement plaster in 1:4 mix to the above block to give aesthetically good appearance. Cost on account of stuttering, strutting, centring, curing etc. is included in the scope of work.

Providing, installation, testing and commissioning of single Phase submersible pumping unit and allied works of following specifications: Pump: Dia. of Well Casing = 125mm Discharge of the Pump = 1-3 Cubic meter per hour (or as per requirement) Dynamic Head Range = 60-80 Meter Speed = 2850 RPM Mat. Of the impeller = Noryl/Cast steel/SS Efficiency = Not less than 45 % Shaft Material = Stainless Steel Fluid to be handled = Clear water Make = KSB/HM/Kirlosker Motor: Rating = corresponding to above mentioned head and Discharge. Frequency = 50Hz Working Voltage = 220 Votls - 15% +6% Efficiency = Not less than 45 % The job also includes: 1. Fabrication, providing & fitting of suitable dia. GI nipple cum reducer as per outlet of above submersible pump duly threaded up to suitable length and other end for membering with column pipe as per site requirement. 2. Providing & fitting of 40 mm dia. long elbow duly threaded at top of well casing.

Fabrication, providing and fitting of 32 mm split type MS clamps 6 mm thick, 1 feet longand 2.5 inch wide for lowering and holding of pumping unit fitted. The job includes the cost of required size of nuts and bolts.

Fabrication, providing & fitting of 32 mm Dia. Medium Class socketed GI column pipe pieces. The job includes the cost of cutting/threading of each column on both sides. Each length of column pipe is to be of 3 Meter long included is cost on account of providing, fitting of desired size heavy duty GI socket to each joint after 10 feet length up to ground level. Pipe material shall be with all BIS codes. Jindal/Syura Prakash/Applo (Qty. may vary as per site requirement at the time of execution).

providing & fitting of 8 mm sq. multi stranded steel wire from gantry post up to pumping unit in well to avoid detachment of pumping unit in case of failer of threaded joint.

Providing and Fitting of 06 No. D-clips for holding/ gripping/fastening of above steel wire.

Providing & fitting of 125 mm dia. Well cap CI/MS. The job includes flushing of 40 mm dia. Hole in the center of cap for column pipe.