ASH input into the design development to convert the Sloy Hydroelectric scheme into a Pumped Storage Scheme

 Scottish Ministers have approved plans to convert the Sloy Hydroelectric Scheme into a Pumped Storage Scheme.

The existing hydroelectric scheme came into operation in 1950 with an installed capacity of over 150MW. The extension of the scheme with a new pumping station would enable water to be transferred from Loch Lomond and Loch Sloy during times of low electricity demand and allow the storage of excess energy ready for use during periods of higher demand or less supply.


Key Tasks

Screening and Scoping

EIA coordination and project management

Landscape and visual impact assessment

Landscape mitigation

Landscape design

Stakeholder consultation

Public consultation

What we did

ASH was appointed by SSE Renewables to coordinate and input into the design development of the new pumping station. This involved carrying out a scoping exercise, options appraisal, landscape and visual appraisal and coordination of all environmental inputs culminating in the production of an Environmental Statement to support the Planning Application.

Due to the sensitivity of the Category A listed site located in a National Park, ASH brought in specialist Architects Page+Park to join the design team.

Throughout the process ASH actively consulted with statutory bodies including Loch Lomond and the Trossachs National Park, Scottish Natural Heritage, SEPA and Transport Scotland in order to ensure that all parties had input into and were satisfied with the final scheme design and associated mitigation proposals.

 Section 36  and Listed Building Consent applications were submitted in August 2009 and planning permission was granted in September 2010.



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.