ASH undertook environmental studies for the new Connagill substation and two new terminal towers

ASH was commissioned by Scottish Hydro Electric Transmission plc to undertake and coordinate environmental studies to construct the new 275 / 132 kV Connagill substation and two new steel lattice towers adjacent to the existing Beauly to Dounreay 275 kV overhaead transmission line.

The development will allow the consented Strathy North Wind Farm to be connected to the existing transmission network.

Key Tasks

Site options appraisal

Screening and Scoping

EIA coordination and project management

Landscape and visual impact assessment


Landscape mitigation

Stakeholder consultation

Environmental monitoring during construction

What we did

ASH prepared and submitted a screening and scoping request for the new substation and two new terminal towers. This set out the the scope of works anticipated for the assessment of the projects.

It was determined that EIA was not required, instead an environmental appraisal was carried out to identify any potentially significant impacts on the environment.

The main environmental concerns of the new substation and steel lattice towers related to a number of environmental topics which included: terrestrial ecology, ornithology, hydrology, landscape and visual, and cultural heritage.

The results of the environmental assessment work were included in the Connagill Substation Environmental Appraisal. Consent was granted by The Highland Council in September 2013 and construction commenced in December 2013.

ASH provided input into the final Construction Environmental Management Plan in order to satisfy planning conditions.

SHE Transmission retained ASH to undertake the co-ordination and supervision of pre-construction archaeological and ecological surveys and reports, in addition to environmental compliance during construction.


Find out more

We’re always happy to answer your questions. If you’d like to find out more about the services we can offer for your project, you can email us on or call 0141 227 3388.