PROVISION OF BOREWELLS AND ALLIED WORKS FOR OTM ACCN, AC PLANT AND FIREFIGHTING AT MO(V) NEW SITE UNDER GE (UTILITY-II) VISAKHAPATNAM

Boring/drilling bore well of required dia for inserting casing/ strainer pipe of 200 mm dia, by Down the Hole Hammer (DTH) Drilling or suitable method prescribed in IS: 2800 (Part-I), including collecting samples from different strata, preparing and submitting strata chart/ bore log, including hire & running charges of all equipments, tools, plants & machineries required for the job, upto 30 m depth below ground level in any type of soil strata including hard stone / boulders complete all as specified and directed by Engineer-in-Charge.

All as per item No. 1.00 here-in-before but depth exceeding 30 m but not exceeding 60 m below ground level (VES1-30 RM + VES2-30RM

All as per item No. 1.00 here-in-before but depth exceeding 60 m but not exceeding 90 m below ground level (VES1-30 RM + VES2-30 RM)

All as per item No. 1.00 here-in-before but depth exceeding 90 m but not exceeding 120 m below ground level (VES1-30 RM + VES2-10 RM)

All as per item No. 1.00 here-in-before but depth exceeding 120 m but not exceeding 150 m below ground level (VES1-30 RM)

All as per item No. 1.00 here-in-before but depth exceeding 150 m but not exceeding 180 m below ground level (VES1-30 RM)

All as per item No. 1.00 here-in-before but depth exceeding 180 m but not exceeding 210 m below ground level (VES1-30 RM)

Development of borewell by reaming from 200mm dia to 350mm dia upto required depth from ground level including gravel packing in tube well construction in accordance with IS: 4097 including providing gravel fine/medium/coarse, in required grading & sizes as per actual site requirement complete all as specified and and directed by Engineer-in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, 200 mm nominal size dia, unplasticized plain PVC medium well casing (CM) pipe, conforming to IS: 12818, including required hire and labour charges, fittings & accessories etc. all complete, for all depths, as per direction of Engineer -in-charge.

Supplying, assembling, lowering and fixing in vertical position in bore well, 200 mm nominal size dia unplasticized PVC medium well screen (RMS) pipes with ribs, conforming to IS: 12818, including hire & labour charges, fittings & accessories etc. all complete, for all depths, as per direction of Engineer-in-charge.