Cookies on our website

The Natural Resources Wales website uses cookies. By continuing to browse or by clicking “Continue,” you agree to the storing of first- and third-party cookies on your device to enhance site navigation, analyse site usage, and assist in our marketing efforts. Cookie policy.

Gwydir Reservoirs

Making sure the reservoirs remain safe in the long-term

It is with regret that on 14 March 2019 our principal contractor working on Cronfeydd Gwydir Reservoirs, Dawnus Construction Ltd, entered into administration. NRW has put in place its contingency plan to keep the reservoirs safe and working areas secure, whilst we work with Administrators to find a way forward. 

There will be limited activity on the reservoir sites during this period. However we will be working very hard behind the scenes to resume the works as quickly as possible. 

We apologise for any inconvenience this may cause and will keep you updated with any developments. 

Should you wish to speak to us in the meantime please contact on 0300 065 3846.  Thank you.

We are starting work to make sure that four reservoirs in the Gwydir Forest near Betws y Coed remain safe in the long-term.

The reservoirs are:

This Plan shows the location of the four reservoirs.

The works are due to start from 30 July 2018, and due to last until Summer 2019.

We have appointed our contractor Dawnus Construction, and the works include:-

  • Strengthening embankments
  • Constructing new spillways
  • Improving access to the reservoirs

Here’s an update on our progress – November 2018

This is part of our work to regulate reservoirs under the Reservoirs Act 1975 and is part of a wider programme of reservoir safety work across Wales.

The Gwydir reservoirs are regularly inspected to make sure they remain safe. At the last inspection, some points were raised over the adequacy of the reservoirs to withstand extreme events.

Whilst there are no immediate concerns, we are looking at ways of ensuring the long-term integrity of the structures.

Work will be phased across the sites to minimise disruption to landowners, local people and recreational users of the forest.

We are fully aware of the environmentally sensitive nature of the areas and all works will be undertaken in a way that is sympathetic to and, where possible, enhances the natural environment.

We will provide regular updates on the work on this website.

If you have any further enquiries at this stage, please let us know by emailing

Related document downloads

Gwydir reservoir safety works update November 2018 PDF [411.6 KB]
Gwydir reservoir safety works update February 2019 PDF [55.4 KB]
Gwydir reservoir safety works March 2019 PDF [40.5 KB]

Is there anything wrong with this page? Give us your feedback.