WATER CATCHMENT AREAS 233 



Conway and Colwyn Bay Joint Water Board obtain their 

 supply from Lake Cowlyd, 4 miles from Llanrwst, with a 

 gathering ground of 1100 acres, between 1169 and 2621 

 feet elevation. The highest points on the gathering ground 

 are Pen Llithrig-y-wrach (2621 feet) and Cregiau Gleision 

 (2213 feet). The area, which is owned by the Board, 

 includes 200 acres of lake and 900 acres of moorland, and 

 is without habitations, farmsteads, or plantations. The 

 water is passed through copper screens, but is not filtered ; 

 and precautions against contamination on the gathering 

 ground are considered unnecessary. The annual rainfall 

 from 1891 to 1906 varied between 58-50 and 114*30 

 inches, the average being 76-61 inches. The catchment 

 area was purchased to do away with a farmstead that was. 

 on it, and to give the Board full control. It is now only 

 used as a sheep-walk, and owing to its elevation and 

 distance very few visitors find their way up there. See 

 T. B. Farrington, in Proc. Inst. MiinicijMl and County 

 Engineers, vol. 33, pp. 200-207 (1907). 



Llandudno Urban District Council obtains its water 

 supply from Lake Dulyn, at 1747 feet elevation, and Lake 

 Melynllyn, at 2094 feet elevation. The united gathering 

 grounds, 710 acres in extent, are entirely moorland at a 

 very high altitude, and together with 730 acres adjoining 

 (1430 acres in all), are owned by the Council. An experi- 

 mental plantation of half an acre has been made at 1650 

 feet elevation. The water is not filtered, but the gathering 

 ground is frequently patrolled, twice a week in summer, 

 and once a week in winter. 



Rhyl Urban District Council obtains its water supply 

 from a gathering ground of 9 acres at Llanefy dd, between 

 485 and 1000 feet elevation, of which 50 acres are owned 

 by the Council. The area comprises 100 acres of planta- 

 tions, 200 acres of hill pasture, and 600 acres of arable 

 land, with small farms upon it. The water is filtered ; and 

 on the gathering ground, the farms, which have intercepting 

 tanks, and the streams are inspected, and excreta are 



