THE SYDNEY WATER SUPPLY. 217 



ing provision to meet them. It is necessary, however, to 

 say that the storage I have mentioned by no means exhausts 

 the capabilities of the catchment area. There are three 

 more, namely, the Burke, the London and the Chain-of- 

 Ponds reservoirs, which should be capable of impounding 

 about 29,000 million of gallons, and, in addition to those, 

 there are two others of 20,000 million gallons situated in 

 the cap of the range at an elevation of over 2,000 feet on 

 the Wingecarribee River, which takes its rise near the 

 village of Eobertson and drains into the Wollondilly River. 

 There is an area of 55 square miles, which can be made 

 available by intercepting the water by a dam at a point 

 above the junction of Wingecarribee Creek with the river, 

 and conveying it by a tunnel seven miles long into Doudles 

 Folly Creek, which drains into the London River within 

 the present catchment area. A second dam on the Winge- 

 carribee area could be constructed on the site suggested by 

 Mr. Gripps when giving evidence before the Royal Com- 

 mission in 1902. The objection then taken to Mr. Gipps' 

 proposal was that the water might be contaminated by the 

 drainage from the village of Robertson, but it will be seen 

 from the map that there should be no difficulty in diverting 

 this drainage and conveying it outside the catchment area, 

 and provision in my estimate of cost has been made for the 

 Resumption of any other holdings that may be considered 

 objectionable. The drainage from the town of Mittagong 

 does not come within this catchment area at all. 



An inspection of the table "A" on page 219 will show 

 that the storage capacity of the reservoirs I have referred 

 to, including Prospect Reservoir, amounts to 116,337,369,000 

 gallons, while the discharge resulting from the mean annual 

 rainfall over the respective areas from which they derive 

 their supply amounts to 140,684 million gallons. If these 

 reservoirs, therefore, are all completed in 1937, the posi- 



