What is the Well Drillers Association?
The Well Drillers Association was first formed some 75 years ago and acts as a forum for interested parties in the design and construction of water wells and boreholes. Its membership consists of companies and individuals engaged in well construction, test pumping, maintenance and rehabilitation. It is not open to manufacturers and materials suppliers but a number of its members act as distributors for well related equipment including pumps.
The Association meetings allow members to discuss the industry, technical specifications, contract problems, training and the potential impact of legislation on the industry. It also maintains close contacts with the Environment Agency, the British Geological Survey and the various Water Authorities and Water Companies.
Since very early days the supply of water for drinking and washing purposes has been critical to the survival of businesses and communities. In early days water was taken from adjacent streams and rivers or from from shallow holes simply dug into the ground. Evidence exists that in Roman times wells or boreholes with their associated pipelines became very sophisticated.
Over the last 100 years the original cable percussive drills used to construct deep and large diameter boreholes have been joined but not replaced with rotary drills using air, water and biodegradeable drilling fluids with both direct and reverse circulation techniques. Water well construction can now be carried out up to depths of 500 metres with less deep boreholes having diameters in excess of one metre.
Before any decision is made on the economics of developing underground water resources for commercial benefit it is important to discuss with the local regional office of the Environment Agency or the Scottish Environment Protection Agency (SEPA) the potential for extracting groundwater at the site. Currently in England and Wales any abstractions above the threshold limit of 20 cubic metres per day have to be licenced by the Environment Agency. Some types of abstractions are exempt altogether, such as abstractions for irrigation other than spray irrigation and abstractions for dewatering (ie in construction works).
In Scotland an application for authorisation must be made to SEPA for abstractions above 10 cubic metres per day. Abstractions of less than 10 cu m per day for the purpose of dewatering and abstractions for the purpose of extracting geothermal energy are covered by a General Binding Rule and provided the rules are complied with no application for authorisation to SEPA is required.
It is also necessary to investigate the expected geology and groundwater regime at the site and this can be carried by the client, engineer or experienced drilling contractor contacting the Records Section of the British Geological Survey at Wallingford, Oxfordshire. They can for a fee prepare a site groundwater assessment report based on information available to them in their borehole data base. If both these reports are favourable in terms of quality and quantity then in England and Wales for an abstraction rate in excess of 20 cu m per day, a consent to drill and test pump an exploratory borehole must be sought from the Environment Agency. In Scotland an authorisation to drill and test pump a borehole is generally required from SEPA for boreholes intended for the purpose of abstracting more than 10 cu m per day.
At this stage and subject to the Environment Agency consent or SEPA authorisation, drilling contractors with experience in the area should be consulted either directly or through an experienced consultant on the estimated cost of constructing and testing the proposed borehole, which may also be the permanent extraction borehole. A detailed written estimate should be obtained and if acceptable should be confirmed in writing. With the construction and testing completed it is then necessary to submit the results to the Environment Agency or SEPA with an application for a licence to extract the prescribed quantities of groundwater for commercial purposes.
Reference should be made to The Well Drillers Association publication “Guidance Notes for the Construction of Boreholes for Water Supply” covering contract arrangements, general matters including polution precautions, equipment and materials specifications and legislation.
Our Chariman - Keith Myers
Our Vice Chairman – Darren Hughes
Darren has over twenty years experience in the drilling industry, his career having taken him as far afield as the Middle East and South Americas. He now runs D Hughes Welldrillers Ltd, a small family business which specialises in water wells and irrigation throughout the UK.
Our Secretary - Karenlee Barrett