Details: positioning of the rig for retrival of failed borewells, raising mast and aligning the hammer and drill rods moounded on the rotary head of the rig concentric with borewell of 140-149 mm dia. to be retrived (wherever further geo-physical investigation has revealed that the existing aquifer /aquifers have not been tapped to the full depth) including selection of the suitable bit for deepening etc. the cost is for the work of each bore well.(p.no. 140, it.no. 12.3 csr 2023-24 volume 5);geophysical investigation at site for sinking borewells for providing drinking water to the habitation either through the hand pump mws or p.w.s.s, by vertical electrical sounding by adopting venner or schlumbergers's method, including reconnaissance survey of geological formation. geophysical investigation of existing ground water in the vicinity, its quality, quantity and acceptability of the users, indicatin the location of the site, recommended depth of casing pipe required to seal the top unconsolidat
Sector: Municipality