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We have been informed that the planned reservoir release on Thursday 8th December will no longer be taking place. Therefore Porth Yr Ogof will be open as usual and there will be no additional risk to users of the Mellte Gorge. I will update you again when we are sent a revised date for the … Read more

Please be aware that due to a very large water release from the Ystradfellte Reservoir, Porth Yr Ogof will be closed for the day on Thursday 8th December. It is also strongly advised that you do not use the Mellte for adventurous activities on this day, due to the flood pulse expected.

Please be aware that there will be water release test from the Ystradfellte Reservoir on Friday January 15th from 2pm. It is hoped that this is be the final test required before work is started on the reservoir. The last release raised water levels in the cave by 0.5m, this release will be double that … Read more