Water Supply Schemes Underjjm / Deposit Works In North Tripura District During The Year 2024-25/ Sh: Drilling & Development Of 3(Three) Nos. Deep Tube Wells Withcontractor’S High Capacity Direct Rotary Drilling Rig, Contractor’S Own Supply Erw Pipes, Pea , dharmanagar-Tripura

Water supply Schemes underJJM / Deposit Works in North Tripura District during the year 2024-25/ SH: Drilling & Development of 3(three) Nos. Deep Tube Wells withContractor’s high capacity direct rotary drilling rig, Contractor’s own supply ERW pipes, Pea Gravels and other machineries & equipments within North Tripura District. / GR-II.-Drilling and boring pilot hole in any soil strata by deep drilling / high power 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 contractors high power rig 2 I)Upto 250 mts 3 i) 320 mm dia 4 II)Beyond 250 mtr. and upto 375 mtr. 5 ii) 320 mm dia 6 III)Beyond 375 mtr. and upto 500 mtr. 7 ii) 320 mm dia 8 Reaming of pilot hole to an enlarged bore hole in any soil strata by deep 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 contractors high power rig 9 I)Upto 250 mts 10 i) From 320 mm dia pilot hoe to 550 mm bore hole 11 ii) From 320 mm dia pilot hoe to 460 mm bore hole 12 II)Beyond 250 mtr. and upto 375 mtr. 13 i) From 320 mm dia pilot hoe to 460 mm bore hole 14 III)Beyond 375 mtr. and upto 500 mtr. 15 i) From 320 mm dia pilot hoe to 460 mm bore hole 16 Washing of enlarged bore hole of 460 - 550 mm dia in any soil strata by deep 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 contractors high power rig 17 Providing and lowering of ERW pipe conforming to IS:3589- 2001 (with latest revision) with deep 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 contractors high power rig 18 i) 300 mm dia ERW Housing Pipes 19 ii) 200 mm dia ERW Blind Pipes 20 iii) 200 mm dia ERW Slotted Pipes 21 Providing and fixing of bail plug ( made with 8 mm thick MS sheet ) by welding with blind pipe including applying of anticorrusive bitumastic paint as per specification ( IS : 2800 (part-I)) and direction of the Engineer - in - charge.i) For 200 mm dia ERW pipes 22 Providing and fixing of reducing socket ( made with 8 mm thick MS sheet ) by welding with blind pipe including applying of anti-corrusive bitumastic paint as per specification ( IS : 2800 (part-I)) and direction of the Engineer - in - charge. A) with contractors high power rigi) 300 X 200 mm dia 23 Providing and shrouding of the deep tube well assembly with washed pea gravels ( 2.0 - 4.75 mm effective size ) as per specification ( IS : 4097) using deep drilling rig and direction of the Engineer - in - charge. A) With contractors high power rig 24 i. With pea gravels obtained from Durgapur, West Bengal. 25 ii. With pea gravels obtained from Golaghat, Assam. 26 Providing and fixing of housing clamp ( made with 12 mm thick MS sheet ) by welding with blind pipe including applying of anti-corrusive bitumastic paint as per specification ( IS : 2800 (part-I)) and direction of the Engineer - in - charge.. i) 300 mm dia 27 Washing and development of tube well by using air compressor, and testing of the well as per specification ( IS : 11189 ) and direction of the Engineer - in - charge 28 I) Upto 200 mtr pipe assembly A) with contractors air compressor ii) using air compressor of 300 - 450 cfm output for DTW 29 II) Beyond 200 mtr pipe assembly A) with contractors air compressoriii) using air compressor of 1100 cfm output 30 Providing and fixing of well cap ( made with 8 mm thick MS sheet ) by welding with blind pipe including applying of anticorrusive bitumastic paint as per specification ( IS : 2800 (part-I)) and direction of the Engineer - in - charge.i) For 300 mm dia ERW pipes 31 Providing and filling of the abandoned pilot hole of deep tube well with available materials obtained from pilot hole / sand / earth / any other suitable materials as per specification and direction of the Engineer - in - charge. i. with available materials obtained from pilot hole (50%) and sandy earth(50%) 32 Charges for electro-logging for ground water exploration related to potable drinking water purpose borewell (200-550 mm dia) using a microprocessor based digital multiprobe borewell logger and submission of acquired data in the shape of numerical as well as graphical and determination of lithologgy and static graphic co-relation of acquifer, effective porosity and permeability, location of water bearing and saturated water zone and its corresponding discharge and also guidance for setting up of tapping zone etc. complete as per direction of the Engg-in-charge ( All necessary equipments relating to electro-logging should have to be arranged by the agency ) 33 i) BGL upto 250.00 mtr. 34 ii) BGL beyond 250.00 mtr and upto 457.00 mtr 35 Cleaning by cutting trees,bushes etc & levelling the site by engaging excavator, labourer etc. As per the direction of the Engineer incharge.

INR 4000 /-

INR 250861.0 /-

INR 1.25 Crore /-