Constructing water sources.
WHAT THE BUSINESS INVOLVES
Site assessment Drilling Construction and completion Testing and development Pump installation Handover
WHY SITE ASSESSMENT MATTERS
Drilling without it produces dry holes at full cost.
WHAT ASSESSMENT SHOULD INVOLVE
Geophysical survey Local knowledge of existing boreholes Geological information
WHAT TO ESTABLISH WITH THE CUSTOMER
That a survey improves the probability, and does not guarantee water.
WHY IN ADVANCE
Dry holes produce disputes about payment.
WHAT TO AGREE IN WRITING
What is included What depth is covered, and what additional depth costs What happens if no water is found What yield, if any, is expected Whether casing, gravel pack and development are included What testing is provided
WHY DEPTH SPECIFICALLY
It is the commonest source of dispute.
WHAT CONSTRUCTION REQUIRES
Casing appropriate to the ground Screen positioned at the water-bearing zone Gravel pack where required Sanitary seal at the surface
WHY THE SANITARY SEAL MATTERS MOST
It prevents surface contamination entering the borehole.
WHAT TO NEVER OMIT
It, regardless of price pressure.
WHAT DEVELOPMENT ACHIEVES
Removing fine material so the borehole yields properly.
WHAT TESTING ESTABLISHES
The sustainable yield.
WHY SUSTAINABLE
A borehole pumped beyond its yield fails.
WHAT TO PROVIDE THE CUSTOMER
A record: depth, formations, casing, screen position, yield, water level, test results.
WHY
It is required for pump selection and future maintenance.
