Including Boundary Wall, Errochty Power Station, Garry Hydro Electric Scheme, Tummel

Errochty Power Station, part of the Garry Hydro Electric Scheme, was designed by architect James Shearer for the North of Scotland Hydro Electric Board in 1955. This tall, single-storey power station has a rectangular plan and is faced with rubble in a modern vernacular style. It is set on a podium made of rubble walls, which oversails the tailrace, and features a vehicular access deck on the left side. The building is positioned tightly against a cliff face at the rear, with a steep wooded slope above.

The principal elevation on the southwest side has roughly six bays. It features concrete piers at the centre that oversail the tailrace, with a moulded cill course that integrates with the access deck parapet on the left. There is a large teak boarded vehicular access door on the left, framed by a moulded sandstone surround and topped with a decorative moulded panel displaying the coat of arms of the North of Scotland Hydro Electric Board. The centre of the elevation has three tall rectangular windows aligned with the tailrace outfalls below, and a small pedestrian access door is located at the far right.

The west end elevation consists of a wide single bay with a large rectangular window in the centre. The northeast rear elevation has roughly six bays, featuring a lower single-storey section with a piended roof at the centre. The lower part is finished in plain concrete up to cill height, while the upper section is constructed of random rubble in banded courses. There are three rectangular windows in the turbine hall, along with a small pedestrian access door in the re-entrant angle of the additional wing.

The east end elevation mirrors the west elevation. The building predominantly features small pane metal glazing, with some hopper opening windows in painted metal surrounds. It has a recessed flat platform roof and metal rainwater goods that are concealed behind the parapet.

Inside, the power station has a plain and functional layout, dominated by a large turbine hall, with some office and storage spaces located at the rear. A large travelling crane is supported on a steel gantry and large concrete piers.