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Threipmuir Reservoir

A reservoir lying on the course of the Bavelaw Burn within the Pentland Hills, Threipmuir Reservoir lies 2 miles (3 km) southeast of Balerno, to the south of Edinburgh. It was built 1843-48 by engineer James Jardine (1776 - 1858) as one of a network of reservoirs that supply the city with water. This function has now been discontinued, although it remains the property of Scottish Water. Retained by an earth embankment dam 400m (1312 feet) in length and 9.5m (31 feet) high, it extends to an area of 94.8 ha (234 acres). The maximum water depth is 5.2m (17 feet) and the reservoir has a capacity of 2359 million litres (519 million gallons). Threipmuir discharges into the smaller Harlaw Reservoir below and hence into the Bavelaw Burn. Both reservoirs provide essential upstream flood storage to prevent flooding of the Water of Leith.

Threipmuir contains wild brown trout and is also stocked by the Malleny Angling Association to provide recreational fishing.


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