WATER CATCHMENT AEEAS 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 

 Titans. Inst. Water Engineers, xviii. (1913). 



Hudderslield 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 Joitrn. Linnean Soc. {Botany), vol. 

 xxxvii. 333-406 (1905). 



