DTW scheme under JJM in Gomati District, Tripura/Drilling and Development of 03(Three) Nos. Deep Tube Wells with Contractors high-capacity direct rotary drilling rig and other machineries and equipments including providing of ERW pipes, Pea-Gravels e

Drilling and boring pilot hole in any soil strata by Drilling rig, collection of soil samples of different strata met with during drilling at various suitable levels, preservation of samples in polythene bags / sample boxes and disposal of excess soil or mud, including the cost for bentonite, water etc. as required to maintain the pilot hole properly as per specification ( IS : 2800 (part-I)) and direction of the Engineer - in - charge. A) With Contractor's high Power Rig I) Upto 250.00 Mtr i) 320 mm dia

II) Beyond 250.00 mtr. And upto 375.00 mtr. i) 320 mm dia

III) Beyond 375.00 mtr. And upto 500.00 mtr. i) 320 mm dia

Reaming of pilot hole to an enlarged bore hole in any soil strata by drilling rig, disposal of excess soil or mud, including the cost for bentonite, water etc. as required to maintain the bore hole properly as per specification ( IS : 2800 (part-I)) and direction of the Engineer - in - charge. A) With Contractor's high Power Rig I) Upto 250.00 mtr. i) From 320 mm dia pilot hole to 550 mm bore hole

ii) From 320 mm dia pilot hole to 460 mm bore hole

II) Beyond 250.00 mtr upto 375.00 mtr. i) From 320 mm dia pilot hole to 460 mm bore hole

III) Beyond 375.00 mtr upto 500.00 mtr. i) From 320 mm dia pilot hole to 460 mm bore hole

Washing of enlarged bore hole of 460 - 550 mm dia in any soil strata by drilling rig, disposal of excess soil or mud, including the cost for bentonite, water etc. as required to maintain the bore hole properly including lifting of drill pipes as per specification ( IS : 2800 (part-I)) and direction of the Engineer - in - charge. A) With Contractor's high Power Rig

Providing and Lowering of ERW pipe conforming to IS: 3589-2001 (with latest revision) with drilling rig including painting with anti corrosive bitumastic paints, fixing of M.S ring, welding of all joints etc. complete after washing of the bore hole as per specification (IS: 2800 (Part-I) and direction of the Engineer-in-charge. A) With Contractor's high Power Rig a) 300 mm dia ERW Housing Pipe

b) 200 mm dia ERW Blind Pipe