Construction of 250 mm Nominal dia Casing Gravel Packed Tube Well for WSS Wani Doursa Tekipora at Wani Doursa Lolab District Kupwara.

Boring/Drilling bore well of required dia for casing/strainer pipe by suitable method prescribed in IS: 2800 (Part I), including collecting samples from different strata, preparing and submitting strata chart/bore log, including hire and running charges of all equipment tools plants and machineries required for the job, all complete as per direction of Engineer-in-charge up to 90 m depth below ground. All kinds of soil (Diameter of casing/strainer pipe= 250mm)

Boring/Drilling bore well of required dia for casing/strainer pipe by suitable method prescribed in IS: 2800 (Part I), including collecting samples from different strata, preparing and submitting strata chart/bore log, including hire and running charges of all equipment tools plants and machineries required for the job, all complete as per direction of Engineer-in-charge beyond 90 m & upto 160m depth below ground level. (The drilling depth may increase or decrease at the time of execution subject to physical conditions) All kinds of soil (Diameter of casing/strainer pipe= 250mm)

Gravel packing in tube well construction in accordance with IS:4097, including providing gravel fine/medium/coarse in required grading and sizes as per actual requirement all complete as per direction of Engineer in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric resistance welded) Fe 410 mild steel, screwed and socketed/plain ended casing pipe of required dia, conforming to IS: 4270 of reputed and approved make including painted with outside surface with two coats of anticorrosive paint of approved brand and manufacture including required hire and labour charges, fitting and accessories, all complete for all depths as per direction of Engineer-in-charge. 250 mm nominal dia. having minimum wall thickness 6.40mm (The length of the casing pipe may incerase or decrease at the time of execution of work as per the approved casing diagram)

Supplying, assembling, lowering and fixing in vertical position in bore well, ERW (Electric resistance welded) Fe 410 plain slotted (having slot size 1.6/3.2 mm) mild steel threaded and socketed/plain bevel ended pipe (Class B) of required dia, conforming to IS: 8110, of reputed and approved make having wall thickness not less than 6.40mm including painted with outside surface with two coats of anticorrosive bitumastic paint of approved brand and manufacture including required hire and labour charges, fitting and accessories, all complete for all depths as per direction of Engineer-in-charge. 250 mm nominal size dia. (The length of the casing pipe may incerase or decrease at the time of execution of work as per the approved casing diagram)

Development of tube well in accordance with IS: 2800 (Part I) and IS: 11189 to establish maximum rate of usable water yield without sand content (beyond permissible limit) with required capacity air compressor, running the compressor for required time till well is fully developed, measuring yield of well by V-Notch method or any other approved method, measuring static level and draw down etc. by step draw down method, collecting water samples and getting tested in approved laboratory I/C disinfection of tube well all complete including required hire and labour charges of air compressor, tools and accessories etc. all as per direction of Engineer-in-charge. The grouting and sealing of tube well has to be done to ensure safe sanitary conditions. The well casing shall be anchored with ISMC-150 & CC- Block. The CC-Block shall be laid of size (2x2x1) meter in M-15 mix, excluding the annular dia 600mm around well and slopping away fronm it to prevent contaminated water flowing back into it. The casing pipe as to be anchored by a welding ISMC-150 steel bracing of 2 Mtr length each ( 04 No. Bracing or channels) with cleats and sufficient welding area, bracing embedded with CC- block as per the direction of the site engineer.