Lairg - Loch Buidhe

Type:
Transmission reinforcement
Location:
Highland
Rating:
132kV

Constructing a 17km double circuit line to link Lairg substation with Loch Buidhe substation, supporting power generation.

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Overview

Status: Operational Phase

Stage 5 of 5

5 joined together arrow shapes in a row each labelled with the stage number. All arrows are highlighted in filled green shades to indicate the project is at stage 5 of 5
  • Stage 1: Project Assessment: (Completed)

    During the Project Assessment stage, we’re committed to evaluating potential project strategies. At this stage, we provide information about the proposed project plans on our website for stakeholders to review and provide feedback on, as well as holding in-person events within the local community demonstrating our collaborative approach to the project's development.

  • Stage 2: Early Development: (Completed)

    During Early Development, we concentrate on refining the project details, based on our initial assessment of key environmental, technical, and economic factors to identify the best performing approach. We would like to gain further input from communities through accessible in-person and in some cases online consultations, which are crucial in refining our plans and strategies before advancing to the application stage.

  • Stage 3: Project Refinement: (Completed)

    The Project Refinement stage is where we finalise project plans and submit the required planning applications to the relevant planning authorities. Communities and other key stakeholders can provide feedback directly to the appropriate body such as their local council and constituent representatives.

  • Stage 4: Construction Phase: (Completed)

    Within the construction phase we mobilise our workforce, contractors, and necessary equipment to begin construction. We maintain open channels of communication, allowing communities and stakeholders to submit feedback on the construction activities to our dedicated Community Liaison Managers, ensuring ongoing engagement to any thoughts or concerns while we carry out work in the area.

  • Stage 5: Operational Phase: (Completed)

    At this final stage, the project successfully moves into the operational phase, with the surrounding environment restored to its original state or better. Our Community Liaison Mangers continue to be available to address any questions or concerns, ensuring a lasting positive impact and strong community relations even after the construction activities conclude.

About the Project

The Lairg - Loch Buidhe Reinforcements of electricity transmission assets comprise the following elements:

New Lairg Substation (Dalchork)

Construct a new outdoor 132kV Air Insulated Switchgear (AIS) substation north of Lairg, adjacent to the existing 132kV single circuit overhead line.

Lairg to Loch Buidhe Overhead Line

Construct approximately 17km of 132kV double circuit overhead line (61 towers) between the proposed new Lairg Substation and the Loch Buidhe Substation on a new alignment. 

Loch Buidhe Substation

The installation of an access track and small compound to the north of the existing main substation which allows the overhead line to change to a cable and then routed into the existing main substation. 

Lairg Grid Supply Point

Minor works required to upgrade the existing plant.

Cassley Grid Supply Point (Overscraig)

Minor works required to upgrade the existing plant.

Lairg to Shin Overhead Line

Dismantle approximately 12km of existing 132kV overhead line between the existing Lairg Grid Supply Point and Shin Substation (Inveran).

Find Out More About Loch Buidhe 132kV Substation

Construction Works

Dalchork Substation Construction Phase 1

The substation package of works has been awarded to Balfour Beatty. Construction of the substation will be from July 2020 - May 2022 with phase 1 between July 2020 and June 2021.  The main civil construction works will include the following:

  • 1100m of access track 5.0m to the planned substation platform;
  • 450m of public road widening A836 from the junction of A838;
  •  Contractor Compound and laydown – 600m from the public road;
  • Perimeter stock fencing;
  • Underground of the existing 11kV wood pole along the access road;
  • Construct a 270m by 160m wide platform;
  • Technique cut fill – reduces import of aggregates;
  • Construction of a single-story Control Building;
  • Installation of site services:
    • Drainage
    • Cable routes - power and control
    • Potable water [Scottish Water]
    • Mains Power Supply [SHEPD DNO]
    • Earthing grid
  • Installation of internal roads;
  • Installation of site palisade fencing;
  • Installation of reinforced concrete foundations

Dalchork Substation Construction Phase 2 and 3

  • Phase 2 Main HV electrical equipment installation March 2021 – Dec 2021
    • Installation of HV equipment structures
    • Installation of HV equipment
    • Installation of cabling
    • Installation of control systems in Control Building
  • Phase 3 Commissioning stage Nov 2021- May 2022
    • Commissioning of installed equipment
    • Testing of installed equipment
    • Go live

Overhead Line Works

A contract has been awarded to Wood Group for the overhead line works including a new double-circuit tower line to Loch Buidhe of 61 towers. The construction of the overhead line works will commence in September 2020, and last until May 2022.

Phase 1 of the works will consist of the following elements:

  • Constructing access tracks to Tower locations;
  • Form a contractor compound circa 1500m of A836;
  • Construct a new access track from Loch Laro north towards A839 [Rogart road] with imported stone.

Overhead line works Phase 2 & 3

Phase 2 – Tower foundations and Tower erecting

  • Install reinforced concrete tower foundations
  • Erect steel lattice towers

Phase 3 – Install conductors

  • Install wires from tower to tower

Loch Buidhe Remote End Works

The Loch Buidhe works have been awarded to Balfour Beatty as part of the main Dalchork contract. Construction programme for this section was January 2021 – May 2022. The works included:

Civil works

  • Contractor compound establishment at the existing main substation
  • Access track off the existing track to a stone platform with imported stone
  • Construction a stone platform with imported stone
  • Install cable ducts from the stone platform to the existing substation
  • Install 40no+ small reinforced concrete foundations in the existing substation

Electrical Works April 2021 – Dec 2021

  • Install 2no cable circuits from CSE platform compound to the existing substation
  • Installation of HV equipment structures
  • Installation of HV equipment
  • Installation of cabling
  • Installation of control systems in Control Building

Commissioning stage Nov 2021- May 2022

  • Commissioning of installed equipment
  • Testing of installed equipment
  • Go live

An SSEN Transmission vehicle parked off-road. In the background is a series of metal transmission tower forming an overhead line.

Community Engagement

Throughout the life of our projects, we aim to work positively with local communities and keep people informed about what we are doing. This is particularly important when we are developing a proposal and we want to understand what local people think about our plans.

We endeavour to take the time to discuss proposals with local community councils, encourage engagement from the wider community and listen to the feedback we receive.

We will do our best to answer any questions and address issues or concerns that are raised with us.

When our project progresses into construction, we will continue working closely with the local community to ensure that our work has as little impact on the lives of those living and working in the area and as many long term positive effects as possible.

An SSEN Transmission employees speaking with a member of the public at their door.

How we’re embracing artificial intelligence (AI)
We intend to use AI to assist our experienced teams in the analysis of your feedback, so we can categorise key points raised more quickly. You can learn more about how we’re utilising AI on this dedicated web page.

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