Where any borehole is drilled into past coal mine workings to access mine water for heat recovery, a Mine Water Heat Recovery Access Agreement will be required from the Coal Authority.
Os caiff unrhyw dwll turio ei ddrilio i mewn i hen weithfeydd glo i gyrraedd at ddŵr i adfer y gwres, bydd angen cael Cytundeb Mynediad Adfer Gwres Dŵr Mwyngloddiau gan yr Awdurdod Glo.