Average Cost of a Borehole Equipped with a
Bucket Pump
For boreholes equipped by bucket pumps, the average cost
is Rs. 11,500
for each borehole, as detailed below.(40Rs.,Rupies, per 1US , Dollar,
in 1999)
Borehole depth
|
90 ft |
Rs. 50/ft |
Rs. 4500 |
Casing
|
18 ft |
Rs. 110/ft |
Rs. 2000
|
Bucket pump (stand, drum,
cylinder, wire rope, foot valve)
|
|
|
Rs. 2000
|
Cement
|
4 bags |
Rs. 135/bag
|
Rs. 540
|
Installation
|
|
|
Rs. 600
|
Transportation (hiring a jeep)
|
|
|
Rs. 500
|
| |
|
|
----------
|
| Subtotal |
|
|
Rs. 10140 |
Material cost (sand, gravel,
stones, bricks, labor, as people
contribution)
|
|
|
Rs. 600
|
Miscellaneous
|
|
|
Rs. 760
|
| |
|
|
---------- |
Total
|
|
|
Rs.
11500
|
The average cost for the installation of bucket pumps in
abandoned boreholes drilled by GSDA is Rs. 9000 (the
cost for
cleaning and testing a 100 ft borehole is Rs 2500, the cost
for
drilling 90 ft is Rs 4500).
The costs above estimated apply only to boreholes drilled
in
hard rock basalt of the Deccan Trap in Maharashtra. The
costs are
rather low as most boreholes did not require more than
18-20 ft
of casing. Furthermore, the program was based on a very
economic
approach characterized by a tight supervision by the
author aimed
at obtaining the best results in the most economical way.
The
cost for the supervision is not included.
It is expected that the costs of boreholes drilled in
soft
formations and equipped by bucket pumps are much higher
as a
larger drilling diameter is required to allocate full
casing and
gravel pack, especially if drilled in alluvial deposits
or other
formations subject to cave-in.
The bucket pump can also be installed in open wells if
the well
is topped by a properly designed reinforced concrete
cover.
As no experience has been acquired until now in India in
using
the bucket pump in the boreholes drilled in soft
formation and in
open hand-dug wells, the real costs involved are not
known.
|
