Weirs And Water Channel (Former Glasgow Corporation Water Works), Loch Arklet To Loch Katrine Aqueduct Outlet, Stronachlachar

The Weirs and Water Channel, part of the former Glasgow Corporation Water Works, is located between Loch Arklet and the Loch Katrine aqueduct outlet in Stronachlachar. Built between 1910 and 1915 by James M Gale and J R Sutherland, this structure features a series of settling ponds and weirs that lead to an outlet channel flowing into Loch Katrine, constructed from coursed red sandstone masonry.

The tunnel exit has a round-arched opening with prominent voussoirs, set within a raised and slightly advanced central section of a three-bay screen wall, which is topped with a crenellated parapet.

The settling ponds consist of three rectangular pools that run parallel to the screen wall, separated by buttressed barrier walls that have sluice openings positioned below the water level.

The weirs include an upper pool that angles out above a five-sided, steep, ten-step weir. There is a timber and iron footbridge crossing the pool before the weir, with steps leading down to a lower section that contains a sluice valve. Regularly-placed pillars support the sluice mechanism at the head of the weir, and the quadrant side walls are splayed out to accommodate the weir. Below this, there is a lower weir with five more deeply spaced steps.

The exit channel features stepped side walls with ashlar copes and a boulder base. Surrounding the settling ponds and upper weir pool are standard Glasgow Corporation Water Works cast-iron railings, which have rose motifs on the heads of the uprights. Additionally, there are cast-iron pedestrian gates on each side of the exit channel at the road bridge.