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.

Llyn Tegid, Gwynedd

We are starting work to make sure Llyn Tegid remains safe in the long-term and can continue to withstand extreme flood events

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

Llyn Tegid is regularly inspected to make sure it remains safe.  At the last inspection, some points were raised over the adequacy of the embankments to withstand very extreme events.

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

You may have noticed some ground investigation, topographical and ecological survey work since out last communication to help us decide what to do. These were sensitively managed to minimise any disruption to your enjoyment of Llyn Tegid and its surrounding environment.

We are fully aware of the environmentally sensitive nature of the area and its importance to the local community, recreational activities and tourism. All these factors will be considered in full, with opportunities for enhancements explored, as part of our work. 

We now have a better understanding of the extent of the work required and are planning to hold a drop-in session for people to learn more about the work and to take on board your views and requirements as we design the work in more detail. The details of this are given below:

  • Date: Wednesday 18 July 2018
  • Time: 2pm-7.30pm
  • Location: Penllyn Leisure Centre, Y Bala, LL23 7SR

At this early stage, it’s difficult to give an overall timescale for the project. However, construction is not expected to start until summer 2019, subject to the necessary planning permission and other approvals that might be necessary.

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

You can find out more about this work by reading our answers to frequently asked questions or look at our Project Consultation Boards.

This Plan gives an indication of where we may need to carry out work.

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