244 FORESTS, WOODS, AND TREES 



made on the gathering ground, which would seem to be 

 suitable for an extensive scheme of afforestation. 



Briton Ferry Urban District Council obtains its water 

 supply from a gathering ground of 240 acres on Pant 

 Howellddu and Cefn Coed Mountain, between 500 and 

 1000 feet elevation, comprising 60 acres of arable land, 

 140 acres of hill pasture, and 40 acres of plantations. 

 The area, of which the Council owns 19 acres, has four 

 dwelling-houses and farmsteads upon it. It is systematically 

 inspected and the water is filtered. 



Glyncorwg Urban District Council obtains its water supply 

 in part from the Nantryallor Brook, with a gathering ground 

 of 550 acres, situated close to the town, between 900 and 

 1000 feet altitude. The whole area is leased by the 

 Council and consists of hill pasture and moor, without 

 houses, farm- steadings, or plantations. The water is not 

 filtered, but the gathering ground is periodically inspected 

 to guard against contamination. 



Pontypridd and Rhondda Joint Water Board obtain their 

 water supply in part from (1) Pontlluestwen reservoir, with 

 a gathering ground of 1484 acres, between 1336 and 1678 

 feet elevation, at the head of the valley of the Rhondda 

 Each (Ordnance Survey, Glamorgan Sheet, xi. 13), and 

 (2) Castell Nos reservoir, lower in the same valley, with a 

 gathering ground of 682 acres, between 1110 and 1695 

 feet elevation. The two areas, comprising 2166 acres, are en- 

 tirely moorland, and without houses, farmsteads, or plantations. 

 The Board own only the sites of the reservoirs, and a 

 narrow strip around them. The water is filtered, and no 

 other precautions against contamination are taken. 



Mountain Ash Urban District Council obtains its water 

 supply from five gathering grounds : 



Clydach Brook . 205 acres, between 932 and 1548 feet elevation. 



Sychnant Brook . 566 ,, „ 950 ,, 1351 ,, 



Nantyrisfa . . 165 „ ,, 950 ,, 1278 ,, 



Darenlas . . 329 „ ,, 600 ,, 1300 ,, „ 



Ffrwd Brook . 170 ,, ,, 700 ,, 1462 „ 



