Water Supply Scheme under RWS/NRDWP/JJM/other Schemes under State funds in Tripura /Re-Sinking ,Drilling and Development of 02 (One) Nos Deep Tube Well with Contractors Direct Rotary drilling Rig and other machineries

Drilling and boring pilot hole in any soil strata by drilling rig, collection of soil samples of diffetent strata met with during drilling at verious 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 Rig

i) 200 mm dia

i) From 200 mm dia pilot hole to 550 mm bore hole

ii) From 200 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.

i) 300 mm dia ERW Housing Pipe

b) 200 mm dia ERW Blind Pipe