Nan y Mwyn - Borehole Installation Works

The Coal Authority (CA) is commissioned by Cyfoeth Naturiol Cymru (Natural Resources Wales - NRW) to undertake engineering interventions for the remediation of pollution by abandoned metal mining at and around Nant y Mwyn Mine, Carmarthenshire. The interventions include the assessment of blow-out potential, and minewater treatment from the historic Deep Boat Level Adit.

The Nant y Mwyn Mine is located to the north-west of the village of Rhandirmyn, Carmarthenshire, Wales, 10 km north of Llandovery, at NGR SN782438 (approx. postcode SA20 0PF).

The works comprise installation of a borehole to intercept the Nant y Mwyn Deep Boat Level Adit.

This will involve the advancement of up to 3No. rotary-drilled boreholes to confirm the location of the historic Deep Boat Level Adit. Work locations and provisional access routes are shown on drawing EV00483-010. Please see supporting documents for more detailed information.

The Environmental Action Plan (EAP) summarises the actions required to implement the environmental mitigation for the proposed Ground Investigation works at the Nant y Mwyn site. It sets out specific objectives and actions defining the way in which environmental risks should be minimised. It also details roles and responsibilities of those involved in the proposed works. The Environmental Action Plan and actions contained therein must be adhered to.