Borewell & Tubewell Works Tenders

Development of tube well in accordance with IS: 2800 (part 1) 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 & draw down etc. by step draw down method, collecting water samples & getting tested in approved laboratory, i/c disinfection of tubewell, all complete, including hire & labour charges of air compressor, tools & accessories etc., all as per requirement and direction of Engineer-in-charg

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. with contractor's rig with pea gravels obtained from Durgapur, West Bengal.

Rates for 24x7 Operations and Maintenance of Didihat, Berinag & Dharchula Urban water supply scheme under Didihat Division.” {such as Leakage repair and removing of chowkage (Water/Sewer), Pump operation/Valves operation, Resolving of consumer complaint of contaminated water etc, Excavation work for chowkage and leakage work etc, O&M of consumer grievance redress center & Office, O&M of water Tanker, Distribution of water/Sewer Bill & Cleaning of cwr/oht/pump house and its campus & tubewell campus, Pump House/ tubewell campus at least 2 times in a year, Date must be Marked on oht/cwr and resolving of consumer complaint of contaminated water, not getting water and other complaint i.e CM helpline 1905 or other state level complaint Portal}under Didihat Division

Tube Well Building work PWD Integrated Building BSR 2022 Construction to tube well from ground levels and upto 100 meter depth and above to accommodate housing and assembly pipe of following sizes in all types of alluvium strata by percussion/ rotary drilling method and with gravel as per IS : 4097-1967 and packing as per IS : 2800 ( Part I & II ) 1979 as amended upto date ( the work includes the cost of gravel & its primary packing and packing during development. lowering of housing & strainer assembly pipes, with supply and wrappiing of coir rope, wherever necessary, for arresting fine sand particles. The work will not include cost of housing pipe and strainer pipe assembly and development work, but work would be completed after obtaining sand free water.) 150 mm Nominal Bore.

Drilling of 150mmm (6”) nominal dia vertical borewells anywhere in Tamilnadu in all formations, suitable for down the hole hammer drilling such as medium hard rock to hard rock formation, consolidated formation etc and drilling over burden to a dia not less than 200mm including insertion of 165 mm PVC casing pipe, couplings caps and other relevant materials required upto the depth as directed by the Engineer or his representative including grouting of cement 25kg (minimum) up to the depth of over burden are including borewell development flushing of borewell at a pressure 7kg/cm2 (100 lb per square inch) including yield test, crew charges, cost of consumables, transportation charges of casing pipes and all other materials including assembling complete to the satisfaction of the Engineer and as stipulated in the technical specification. The entire works should be carried out as per IS 2800 Part I & II / 1979. Finished dia of borewells shall not be less than 145mm

Surging of existing tube well with chemical treatment and bucket wash (prior to use of compressor machine) and developing the tube well with compressor machine at least 3 (three) days at 8 (eight) hours per day till the yield is obtained at least by 75% of the total specified yield of the tube well (measured by 'V' notch tank) and draw down is within the permissible limit of 10% variation and water so obtained after such washing and developing will be free from sand and bacteria for which test report from the Public Analyst is to be obtained. (The rate is inclusive of all labour and materials including hire charges of tools and plants and cost of materials.) (a) For tube well from 40 mm to 100mm top enlarged to have yield from 1500 to 3000 gallons per hour as per size and yield.