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DIY Bore Water

Question

I have been trying to find information on DIY bore water and methods on how to drill bore/spear points water. With water restrictions etc I think it might be an area which might be useful to many renovators. Can you please help.

Answer

First of all I need to make the distinction clear that a spear point is a shallow water bore which does supply water like a deep water bore with the exception that a spear point ranges between 7-20 metres in depth.

The hole is drilled by hand or machine, the casing installed and the screen jetted into place. The suction line connected to the pump and you should have a water supply of 0.5-1 litre per second depending on location in Sydney and depth.

You will need a clear access area of 1 metre square with 6 metres overhead to operate the drilling equipment and installing the pvc casing and as a guide the cost of installation of a spear point can range between $2,000 and $5,000 depending on depth and pump equipment.

Water bores are a little different. A machine needs to be called in to carry out the work. This will require 8 metres in width, 10 metres in length and 12 metres in height. The drill rig will weigh up to 23 tonnes.

The water bore can range from 50 metres to 200 metres in depth and associated costs range from $8,000 to $18,000 just on the drilling; the equipment itself may be between $2,500 and $9,500 with a possible water yield of up to 5 litres per second. Note that the water supply is an unpredictable natural resource and drilling contractors are not responsible if the bore does not yield water.

Note also that spear points and water bores require a license from the Department of Planning Infrastructure & Natural Resources and these may not be available in many areas of Sydney such as Botany due to ground contamination.

In summary, you may be able to undertake the drilling of a spear point but certainly a professional subcontractor needs to be called in for a water bore.

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