QUESTION
Need advice in choosing between full - length casing and digging new borewell in Bangalore, Karnataka

Location of borewell: Horamavu Agara ,Bangalore North ,Bangalore Dist
Dug using: Hydraulic Rig Driller (61/2 inch)

1) Borewell was drilled using a Dia of : 6" 1/2 inch by hydraulic rig
2) MS Casing Pipe(2.5mm) was installed till 33feet and outer safety PVC 10 inch installed upto 13ft
3) 380ft  first water source stuck, with muddy water certified as 3 inch water yield with silt mix.

Driller suggested as to insert slot / blank casing for entire drilled length(400 ft). We ignored the advice of driller(due high cost), when we opened the bore to install the motor, was surprised by seeing that motor (submersible)  getting stopped @ 60ft. This is due to accumulation of silt from the bottom or side unsure of this.

Please advise:

1) Should I go for slot / blank casing till 400 ft? after cleaning borwell by rig.

2) Should I go for a new borewell?

3) Suggest best option which is the economical.


Manjunath
mnmanjunath1@rediffmail.com

by
25 November 2008