WATER CATCHMENT AREAS IN IRELAND 291 
on the Glenedra Water and the other on the Altnaheglish 
River, not far above the point where they unite to form the 
Owenrigh River, The excellent catchment area, which it is 
proposed to acquire, is mountain land, free from habitations 
and any chance of contamination; and is situated in Carna- 
bane, Templemoyle, Glenedra, and Teeavan townlands, 
comprising the basins of the Glenedra and Altnaheglish 
Rivers, and ranging in elevation from about 700 feet to 
2170 feet, the latter being the altitude of Mullaghaneany. 
Buncrana: gathering ground of 250 acres, at 250 to 
800 feet elevation, in Gransha townland, all mountain 
grazing, with one dwelling-house; no filtration. Council 
own none of the ground. 
Letterkenny : new supply from Lough Salt, a lake 73 
acres in extent, at 816 feet elevation; no filtration neces- 
sary. Council own none of the catchment area, acreage of 
which is not stated. 
Holywood: gathering ground of 424 acres in Ballykeel 
and Holywood townlands, between 350 and 664 feet 
elevation, comprising 380 acres of arable land, 30 acres of 
moss and rough grazing, and 14 acres of copse and 
shrubbery in a glen. There are 9 dwelling-houses, all 
with farm-steadings, on the gathering ground. The Council 
own 35 acres, and the measures against contamination 
include “collection of overflows from farmyards and irriga- 
tion of the lands farthest from the main feeders.” 
Bangor obtains its water supply from two gathering 
grounds : 
(1) Helen’s Tower area, 330 acres, between 213 and 
400 feet elevation, comprising 80 acres of mountain grazing 
and 250 acres of plantations, with one dwelling-house upon 
it. (2) Ballysallagh area, 1026 acres, between 277 and 
600 feet elevation, comprising 900 acres of arable land, 26 
acres of hill pasture, and 100 acres of plantations, with 25 
dwelling-houses upon it. The Council own no part of the 
