WATER CATCHMENT AREAS 243 
Of the Lliw area, the Corporation own 215 acres, of 
which all but about 100 acres is occupied by reservoir sites 
and works. Of the Cray area, the Corporation own 174 
acres, of which all but 50 acres is occupied by reservoir 
site and works. There would thus be in the two areas 
about 150 acres of land owned by the Corporation available 
for afforestation. This 150 acres is below 1200 feet 
elevation. Mr. G. R. Collinson, the Water Engineer, is of 
opinion that “the catchment areas, comprising principally 
mountain pasture, seem to be lands which, in the event of 
the State acquiring land for afforestation, could be more 
valuably used for that purpose than remain in their present 
condition. The few plantations that exist seem to indicate 
that afforestation on an extensive scale and under proper 
management could not fail to be successful. Unless the 
Government can, however, obtain land more advantageously 
than public authorities seem to be able to do so for public 
purposes, State afforestation schemes would have to be 
developed on very uneconomic lines.” 
The Swansea water supply is described by R. H. Wyrell, 
C.E., in Proce. Ine. Assoc. Municipal and County Engineers, 
vol. 32, pp. 61-70 (1906). 
Margam has a gathering ground of 1000 acres, at 400 to 
1000 feet elevation. None of the area is owned by the Cor- 
poration except the site of the impounding reservoir at Cwm 
Wenderi, 104 acres in extent, which is held on a lease 
of 999 years, There are no habitations or farm-steadings 
on the gathering ground, which is frequently inspected. 
The water, which is not filtered, is frequently analysed. 
Neath receives its water supply from a gathering ground 
of 843 acres, situated to the east of the town, between 200 
and 1000 feet elevation. The area, none of which is owned 
by the Town Council, comprises 80 acres of arable land, 
533 acres of hill pasture and moor, and 230 acres of 
plantations ; and upon it there are the five farms of Brynau, 
Glannant, Cefn-Saeson, Crynallt, and Preswylfa. The water 
is filtered, and certain drainage arrangements have been 
