242 FORESTS, WOODS, AND TREES 



(Brecknockshire), a mile north of the town, between 1400 

 and 1600 feet elevation. The area is all hill pasture and 

 moor, without habitations or farm-steadings ; and the 

 Council owns only 7 acres, the site of the impounding 

 reservoir and filter beds. No precautions are considered 

 necessary against contamination of the gathering ground. 



Swansea obtains its water supply from two catchment 

 areas, aggregating 5156 acres : 



1. Lliw or Velindre area, 2476 acres, between 416 and 

 1226 feet elevation, with Lower Lliw, Upper Lliw, and 

 Blaenant Dhu reservoirs. The gathering ground, on the 

 head- waters of the Lliw River, comprises 2144 acres of 

 hill pasture and moor, 193 acres of arable land, 115 acres 

 of reservoir sites and works, and 24 acres of plantations, 

 recently felled. Only 147 acres are above the 1000 feet 

 contour line, being unenclosed mountain pasture. There 

 are on the area eighteen farmsteads and habitations, the 

 drainage of which is distributed over the land by irrigating 

 channels ; and two contaminated streams, which intercept 

 the drainage of nine habitations, are conveyed by pipes 

 below the reservoir embankment. 



2. Cray area, 2680 acres, between 1000 and 2380 feet 

 elevation, all hill pasture and moorland, except six acres of 

 plantations and 124 acres of reservoir site and works. No 

 less than 1250 acres are above the 1500 feet contour line. 

 The catchment area, comprising the head-waters of the Cray 

 River, is in Brecknockshire, about 30 miles from Swansea. 

 On the area there are two shepherds' cottages, the drainage 

 of which is conveyed below the Cray reservoir by the bye- 

 wash channel. The annual rainfall on the area varied in 

 1915 from 63-90 inches at 1030 feet to 85-50 inches 

 at 2170 feet altitude. 



As there is no filtration, in addition to the precautions 

 taken with regard to sewage of habitations, constant patrols 

 are in operation on both catchment areas ; and any dead 

 sheep are collected and properly disposed of by arrangement 

 with the farmers. 



