Reservoir Safety Improvement Works
Description: Reservoirs Act 1975: Llyn Mair Reservoir, County of Gwynedd, Eryri National ParkReservoir Safety Improvement Works (MIOS)Tender Expression of InterestStillwater Associates has been employed by Eryri National Park to oversee the implementation of reservoir safety improvement works on Llyn Mair Reservoir. The site is located close to the village of Maentwrog, NGR SH 653 412.The proposed works are the construction of a new siphon pipe to allow the reservoir level to be drawn down in case of emergencies. This is to be achieved by repurposing one of the four existing spillways (Spillway 'C') to contain the new HDPE siphon and then subsequently backfilling with mass concrete or aggregate depending on the location. The upstream leg of the siphon is to be installed using qualified divers with some partial demolition (read more...)
Summary: The Awdurdod Parc Cenedlaethol Eryri is inviting tenders for the Reservoir Safety Improvement Works at the Llyn Mair Reservoir in Eryri National Park, Gwynedd. The procurement falls under the works category and is conducted via a limited method. Interested parties must note that the planning involves installing a new siphon pipe to manage water levels during emergencies and modifying existing spillways. The project deadline is set for 31st July 2026, with the tender submission concluding at 12:00 on 9th March 2026, followed by an award period ending on 14th April 2026. The procurement documents are available online, accessible electronically, with key focuses on civil engineering and water project construction.