WATER CATCHMENT AREAS 221 
a catchment area of 1604 acres, between 450 and 900 
feet elevation, of which the Corporation own about 111 
acres. This gathering ground comprises 654 acres of arable 
land and hill pasture and 950 acres of plantations. There 
is one storage reservoir at Wentwood, Llanvaches. 
The water is filtered, and prevention of contamination 
on the gathering grounds is guarded against by “constant 
inspection and provision of drainage.” 
The Corporation intend to extend their water supply by 
a new scheme in Brecknockshire, involving a large reservoir 
at Pont Rhyd y bine, 24 miles from Talybont, with a catch- 
ment area of 5510 acres at Caerfanell, situated between 
650 and 2500 feet elevation, none of which is owned by 
the Corporation. No Parliamentary powers have been yet 
obtained. 
Tredegar Urban District Council obtains its water supply 
in part from the Georgetown reservoir, a mile east of the 
town, with a gathering ground of 160 acres, between 1200 
and 1500 feet elevation, and comprising 60 acres of arable 
land, 40 acres of hill pasture, and 60 acres of plantations, 
with one farmhouse. The water is filtered. 
Abertillery and District Joint Water Board obtain part of 
their supply from Tillery Brook, with a catchment area of 
600 acres on the Blaentylery Mountain, between 1125 
and 1905 feet elevation, all hill pasture and moorland. 
The Board own 20 acres. The water, which is filtered, is 
stored in the Cwmtillery reservoir, and was until lately 
under the control of the Abertillery Urban District Council. 
The Board are now constructing the Grwyne Fawr reservoir, 
on the Black Mountain in Brecknockshire, with a gathering 
eround of 2150 acres, between 1529 and 2660 feet 
elevation, all hill pasture and moorland, without habitations 
or farm-steadings. 
The Bristol Waterworks Company obtain their supply 
from the Mendip Hills, mainly from streams, though a part 
is derived from springs. The Yeo reservoir on the head- 
