Harperrig Reservoir

A reservoir on the course of the Water of Leith in West Lothian, Harperrig lies to the northwest of the Pentland Hills, 4 miles (6.6 km) south of Mid Calder. Part of a scheme to supply drinking water to Edinburgh, Harperrig was built c.1859 as a compensation reservoir to guarantee water to the mills on the Water of Leith. The outflow of the reservoir was modified in 2007-8 to as part of the Water of Leith flood prevention scheme, so that the reservoir could be used for upstream flood storage and thus regulate the flow of the river.

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