CONTRACT NOTICE – NATIONAL

1 Authority Details

1.1

Authority Name and Address

1.2

Address from which documentation may be obtained

1.3

Completed documents must be returned to:

As in 1.1

2 Contract Details

2.1

Title

Reservoir Safety Improvement Works

2.2

Description of the goods or services required

Reservoirs Act 1975: Llyn Mair Reservoir, County of Gwynedd, Eryri National Park

Reservoir Safety Improvement Works (MIOS)

Tender Expression of Interest

Stillwater 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 work undertaken to the chamber. Additionally, Spillway ‘D’ is to be abandoned in situ by forming a wall across the existing channel.

The works are required to address statutory recommendations made in the interests of reservoir safety. Eryri National Park has committed to having the works completed by 31st July 2026 and it is imperative that the successful contractor delivers the works accordingly.

NOTE: To register your interest in this notice and obtain any additional information please visit the Sell2Wales Web Site at https://www.sell2wales.gov.wales/Search/Search_Switch.aspx?ID=161799.

The buyer has indicated that it will accept electronic responses to this notice via the Postbox facility. A user guide is available at https://www.sell2wales.gov.wales/sitehelp/help_guides.aspx.

Suppliers are advised to allow adequate time for uploading documents and to dispatch the electronic response well in advance of the closing time to avoid any last minute problems.

2.3

Notice Coding and Classification

2.4

Total quantity or scope of tender

Three month construction project, requiring specialist skills and equipment

3 Conditions for Participation

3.1

Minimum standards and qualification required

see tender documents

4 Administrative Information

4.1

Type of Procedure

Dual stage

4.2

Reference number attributed to the notice by the contracting authority

N/a

4.3

Time Limits

4.5

Language or languages in which tenders or requests to participate can be drawn up

4.6

Tender Submission Postbox

5 Other Information

5.1

Additional Information

see tender documents

(WA Ref:161799)

5.2

Additional Documentation

5.3

Publication date of this notice