Loch Thom, reservoir in Inverclyde, Scotland, UK, outflows to the Upper Gryfe reservoir
Loch Thom is a large reservoir in Inverclyde, Scotland, situated among green uplands with open views of rolling countryside. The water fills a substantial basin created in the early 1800s to supply Greenock with fresh water through an engineered system.
The reservoir was constructed between 1825 and 1827 to supply Greenock with clean water during rapid urban growth and disease outbreaks. Engineer Robert Thom designed the project and created the Greenock Cut, an aqueduct roughly 11 miles long, to carry water from the hills to the town.
The name Loch Thom honors engineer Robert Thom, who created this water source and supported Greenock's growth and public health. Today, the place reflects how engineering and community care came together in the 1800s.
The site is easy to access with walking paths along the reservoir shore, and the Greenock Cut Centre serves as a starting point for routes around the area. Wear sturdy shoes if you plan to climb Dunrod Hill, as the path can be steep and uneven.
The opening of the aqueduct in April 1827 was a major celebration with boats, cheering crowds, and cannon fire, with officials declaring a holiday for the community. Today, although the Greenock Cut no longer serves for water supply, it stands as a protected historic monument and invites visitors to walk its length.
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