Listed Building

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Status: Designated


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Date Added
Local Authority
East Renfrewshire
Planning Authority
East Renfrewshire
NS 51769 56993
251769, 656993


William Gale engineer, circa 1853-4. Octagonal-plan, gently tapered tower with crenellated parapet and doorway, windows and balcony at upper level. Sandstone ashlar. 1899 handrail to cantilevered stone balcony; string course; corbelled parapet. Chamfered openings with hoodmoulds; stone mullioned bipartite windows to 3 elevations; various openings below water level. Interior contains operating machinery for 3 sluices. 1945 trussed footbridge with 1920 entrance gate.

Statement of Special Interest

A good and early working example of a reservoir draw-off tower. Its function was to draw water out of the reservoir, which was then discharged into Ryatt Linn Falls Basin on the other side of Aurs Road and thence would enter either Ryatt Linn, Waulkmill Glen or Littleton reservoir, depending on the level of demand.

Balgray reservoir was the last, and largest reservoir built for the Gorbals Gravitation Water Company (GCWC) as part of an extension to their original scheme, which was constructed 1847-8. The GCWC scheme was one of the first large-scale water supply schemes in Scotland and, although eclipsed by the slightly later scheme from Loch Katrine, is nevertheless of considerable historical and engineering interest.

Balgray reservoir covers an area of 153.5 acres with a capacity of nearly 120 million cubic feet. This more than doubled the size of the original scheme, the three reservoirs of which (Waulkmill Glen, Ryatt Linn and Littleton) have a capacity of roughly 50 million cubic feet. As well as significantly increasing capacity, Balgray was designed to allow sediment in the water to settle out before the water passed through to the smaller reservoirs. The principal feature of Balgray reservoir is this crenellated draw-off tower, which encases a large cast-iron cylinder with openings at various heights controlled by sluices that feed into two 24-inch diameter pipes. A similar arrangement exists at Waulkmill Glen reservoir.

The Gorbals Gravitation Water Company was originally a private firm established to supply water to the Gorbals, the inhabitants of which were keen to establish their own water supply as water provision in the area was poor, relying largely on wells. The Brockburn was identified as a good potential source, and after some opposition an Act of Parliament was passed in 1846 allowing this. The first phase of the scheme (which was always intended for expansion) comprised Waulkmill Glen, Ryatt Linn and Littleton reservoirs and associated filters, and supplied water to the Gorbals, Pollokshaws and Govan. It was built in 1847-8 by the engineer William Gale, elder brother of James M Gale who worked on the Loch Katrine scheme. The construction of the scheme was a considerable engineering achievement and the cast-iron pipes used to carry the water from the reservoirs to the filters and thence into the city were made using newly-developed vertical casting technologies.

In 1853 a further Act of Parliament was passed to allow the expansion of the scheme with the construction of Balgray reservoir. This enabled it to supply Rutherglen, Nitshill, Hurlet, Barrhead, Renfrew and surrounding areas with water as well as the places mentioned above. In 1855 the company was bought out by Glasgow Corporation Waterworks, and therefore became publically-owned.

Listed as part of the thematic review of the Glasgow water supply system (2008).



shown on 1st edition OS map (circa 1863). Paxton & Shipway, Civil Engineering Heritage: Scotland Lowlands and Borders (2007), p251. Jelle Muyle and RCAHMS, Gorbals Gravitation Water Company / Glasgow Corporation Waterworks and Related Structures (unpublished survey report, 2008).

About Listed Buildings

Listing is the way that a building or structure of special architectural or historic interest is recognised by law through the Planning (Listed Buildings and Conservation Areas) (Scotland) Act 1997.

We list buildings of special architectural or historic interest using the criteria published in the Historic Environment Scotland Policy Statement.

The information in the listed building record gives an indication of the special architectural or historic interest of the listed building(s). It is not a definitive historical account or a complete description of the building(s). The format of the listed building record has changed over time. Earlier records may be brief and some information will not have been recorded.

The only legal part of the listing is the address/name of site. Addresses and building names may have changed since the date of listing and if a number or name is missing from a listing address it may still be listed. Listing covers both the exterior and the interior and any object or structure fixed to the building. Listing can also cover structures not physically attached but which are part of the curtilage of the building, such as boundary walls, gates, gatepiers, ancillary buildings etc. The planning authority is responsible for advising on what is covered by the listing including the curtilage of a listed building. Since 1 October 2015 we have been able to exclude items from a listing. If part of a building is not listed, it will say that it is excluded in the statutory address and in the statement of special interest in the listed building record. The statement will use the word 'excluding' and quote the relevant section of the Historic Environment Scotland Act 2014. Some earlier listed building records may use the word 'excluding', but if the Act is not quoted, the record has not been revised to reflect current legislation.

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Printed: 21/04/2019 05:12