Deposit work/Drilling Development of 5Nos DTW with Contractors Direct Rotary drilling Rig and other machineries including providing of ERW pipes, Pea-Gravels etc. in different locations of West District under Rig Sub Div No-I as and when required

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. A. With contractor's Rig

i) 300 mm dia ERW Housing Pipe

ii) 200 mm dia ERW Blind Pipe

iii) 200 mm dia ERW Slotted Pipe

Providing and fixing of bail plug (made with 8 mm thick MS sheet)by welding with blind pipe including applying of anti-corrusivebitumastic paint as per specification (IS : 2800 (part-I)) and direction of the Engineer-in- charge. A. With contractor's Rig i) For 200 mm dia ERW pipes