204 rOEESTS, WOODS, AND TREES 



the same valley there is a compensation reservoir at Under- 

 bank at 600 feet elevation and draining 3000 acres. 



The gathering grounds, 23,906 acres in all, are not 

 owned by the Corporation, and consist for the most part of 

 moorland, with a very small population. No large scheme 

 for afforestation has been proposed. Owing to non-owner- 

 ship, the question has not been taken up by the Corporation, 

 who have planted small areas immediately adjacent to the 

 reservoirs on suitable soil with Scots pine, larch, and birch. 

 The engineer, Mr. L. S. M. Marsh, doubts whether advan- 

 tage would be derived by planting exposed moorland. See 

 notes on the Sheffield water supply in Proc. Inst. Civil 

 Engineers, vol. 181, pp. 1-14 (1910). 



The Sheffield Corporation decided in 1913 to proceed 

 with the construction of two new reservoirs, Broomhead and 

 More Hall reservoirs, with a catchment area of 6496 acres 

 in the Ewdeu Valley, which is a short arm of the Little Don 

 Valley. The gathering ground includes the well-known 

 Broomhead moor, and the valley itself is one of the most 

 beautiful in Yorkshire. The new project is described, with 

 sketch map of the four catchment areas and views of Ewden 

 Valley, in Tlic Engineer, 14th Nov. 1913, pp. 510 and 520. 



Sheffield obtains an independent water supply from the 

 Derwent Valley Water Board. 



Doncaster obtains its water supply in part from an im- 

 pounding reservoir at Thrybergh, with 2517 acres of gather- 

 ing ground on the hills south-west of Conisborough, all 

 pasture and arable land at the low elevation of 180 to 450 

 feet. Most of the area does not belong to the Corporation, 

 who merely exercise sanitary control over it. I am in- 

 formed officially, that " As the character of the land was 

 entirely rural at the time the impounding reservoir was 

 constructed, no farms or houses were removed ; and there 

 are certainly not more than 40 habitations on the whole of 

 the area at the present moment. It has only been found 

 necessary to exercise supervision over the manuring of the 

 arable land, and the removal of carcases from the neigh- 



