The Challenges of Corriegarth Bog Restoration

Nevis restored 65 hectares of blanket bog for conservation using a pioneering combination of techniques for developer, Invenergy LLC, at Corriegarth Estate in Gorthleck, Highland.

The first of its kind in Scotland, Nevis’ bog restoration expertise was developed in-house to complete each aspect of the project effectively and efficiently on an active construction site under CDMC regulations.

The project involved undertaking measures to stabilise eroding peat faces and restore suitable hydrological conditions for active blanket bog. The bog and vegetation conditions were varied, with some areas supporting active blanket bog, and others modified bog vegetation or only limited vegetation on eroding peat. Areas requiring restoration were identified and, where possible, gullies were blocked using site material. The use of coir bales, a by-product from the coconut production industry, was adopted. All of these measures will work together to restore the entire site to an active blanket bog.

The balancing act of completion in an area of frequent adverse weather and high altitude within a limited time frame was achieved through effective planning and co-ordination. The presence of breeding birds in the spring and summer, shooting in the autumn and the coming winter weather, led to the implementation of a practical, flexible schedule tailored to the client. The site is within an active grouse moor meaning that timescales were adapted to accommodate the sporting season.

A helicopter was used for material transport around the site along with innovative use of machinery and careful planning to limit any damage to the existing habitat while the work is being carried out. The project began early June 2016 and was completed late November 2016.

Peat restoration, peatlands, Carbon