Earlstoun Power Station

Earlstoun Power Station

Earlstoun Power Station was designed in 1936 by Sir Alexander Gibb (consulting engineer), Merz and McLellan (electrical engineers), and E M Carmichael of the Office of Public Works. It is a two-storey rectangular power station arranged symmetrically across six bays in Classical Modern style, with a lower terminal bay to the northeast. The building is constructed in painted reinforced concrete.

The facade is defined by full-height pilasters with a recessed parapet above. A slightly advanced door surround features a large vehicular opening with a steel shutter. An inscription above the entrance reads: THE GALLOWAY WATER POWER SCHEME, EARLSTOUN POWER STATION, 1936. The building is lit by large full-height rectangular multi-pane windows in metal frames. The lower block has regular fenestration with pedestrian doors at ground floor level. The roof is a flat platform behind the parapet with integrated cast-iron rainwater goods.

The interior contains a large roller crane on steel girders supported by corniced concrete piers, with engineered steel roof trusses.

Earlstoun Power Station represents a significant example of hydroelectric power architecture and was a key component of Phase II of the influential Galloway Hydropower Scheme. The building is prominently sited adjacent to the A762 road and the B-listed Allangibbon bridge. The power station comprises two turbines fed by water from the nearby Earlstoun reservoir, conducted by aqueduct to penstocks behind the station. The Galloway scheme itself was a major technological achievement and the first large-scale successful implementation of run-of-the-river hydroelectric technology in Scotland.

The architectural design combines the engineering requirements of a large commercial power station with an understated Modernist classical aesthetic. The clean lines, minimal articulation, stark roofline, and rhythmic facade articulation are characteristic of the modern style and reflect the dynamic attitude with which hydroelectricity was viewed in this period.

The Galloway scheme predates the 1943 Hydroelectric (Scotland) Act, which formalised hydroelectric development in Scotland and led to the founding of the North of Scotland Hydroelectric Board. As a pre-1943 development, it was undertaken by a private company in response to specific market and topographic conditions, making it groundbreaking in its independent achievement and in the consistency of high-quality aesthetic and engineering design maintained throughout. The scheme's success influenced future hydropower development in Scotland. Despite initial parliamentary opposition, the scheme was approved with conditions protecting the landscape and amenity of the area, a requirement that led to the high-quality design standards evident in both power stations and dams. This emphasis on visual impact proved influential in the drafting of the 1943 Act.

Sir Alexander Gibb and Partners was a pioneering engineering firm responsible for major works including Kincardine Bridge. Founded in 1921, it became the UK's largest consulting engineering practice with numerous international clients. Gibb was personally involved in designing and constructing the Galloway scheme, and the pioneering nature of the development is substantially attributable to his engineering expertise. Merz and McLellan were pioneering British electrical engineers who developed a high-profile practice working on numerous power stations across Britain, including Dunstan B, and later completed hydroelectric work in Italy during the 1980s.