WATER CATCHMENT AREAS 201 
foot to eight or ten feet, overlying the grits and slates of the 
Millstone Grit, with occasional patches of clay. The chief 
vegetation is rough moorland grass and bilberry, with very 
little heather. The peat contains remains of roots and 
stems of birch trees, but there are probably now not half-a- 
dozen trees on the whole ground. The catchment area 
being within easy reach of manufacturing districts, any 
trees that might be planted would have to grow in an 
atmosphere nearly always smoke-laden. The Corporation 
do not own and have no control over the area, on which 
there is only one habitation, a gamekeeper’s house, the 
drainage of which is piped clear of the gathering ground. 
As no farming operations are carried on, no measure, other 
than filtration, is needed to render the water safe. See 
Trans. Inst. Water Engineers, xviii. (1913). 
Huddersfield obtains its water supply from four gathering 
grounds : 
Blackmoorfoot reservoir, catchment area of 1871 acres, 
between 830 and 1100 feet elevation. 
Deer Hill reservoir, catchment area of 1000 acres, 
between 1140 and 1400 feet elevation. 
Wessenden, Wessenden Head, Blakeley, and Butterley 
reservoirs, catchment area of 2825 acres, between 770 
and 1500 feet elevation. 
Dean Head reservoir, catchment area of 500 acres, 
between 1000 and 1200 feet elevation. 
The gathering grounds aggregate 6196 acres, which 
comprise 5993 acres of moorland and hill pasture, 150 
acres of arable land, and 53 acres of plantations. The 
Corporation own 1200 acres, and the plantations are upon 
the land owned by them. There are a few scattered 
farmsteads on the watersheds, the sewage from which dis- 
charges into cesspools that are cleared out periodically. 
All the water except that from springs is filtered. See 
maps of vegetation and description of Huddersfield district 
by T. W. Woodhead, in Journ. Linnean Soc. (Botany), vol. 
XXxvlil. 333-406 (1905). 
