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Glencorse Reservoir, Treatment Plant
Waterworks (19th Century)
Site Name Glencorse Reservoir, Treatment Plant
Classification Waterworks (19th Century)
Alternative Name(s) Glencorse Reservoir, Filter Beds And Tanks; Logan Burn; The Glen
Canmore ID 110881
Site Number NT26SW 63.01
NGR NT 2236 6315
NGR Description NT 2236 6315 and NT 2245 6308
Datum OSGB36 - NGR
Permalink http://canmore.org.uk/site/110881
- Council Midlothian
- Parish Glencorse
- Former Region Lothian
- Former District Midlothian
- Former County Midlothian
NT26SW 63.01 2236 6315 and 2245 6308
Weir [NAT] (at NT 2231 6323)
Filter Beds (disused) [NAT] (at NT 2236 6315)
Tanks (disused) [NAT] (at NT 2245 6308)
OS 1:10,000 map, 1983.
In 1852-3, three filter beds were installed at Glencorse, the engineer being Mr James Leslie. Each measures 92ft (28m) square, and together they can fliter 3,800,000 gallons (17, 272 cu m) a day. In each case, the ground was excavated or made up, according to circumstances, to a depth of 12ft 6ins (11.4m), the bottoms and sides being made perfectly watertight by clay puddle. Over the bottom part of the bed, there were placed 3ins (76mm) thickness of carefully-washed sand. Above this layer there is a layer of coarser gravel between 1ft 6ins (1.38m) and 3ft 6ins (1.07m) deep, the upper surface being formed in ridges and furrows. Above this, there are a 6in (152mm) thick layer of fine sand, a superimposed layer of seashells of the same thickness, and a further layer of coarse sand above this. The uppermost layer is formed of 1ft 6ins (1.38m) thickness of the finest sand; this layer requires periodic cleaning. A drain of dry mason-work passes down the whole length of the beds to carry off the filtered water.
J Colston 1890.
