222 T. W. KEELE. 



Chain-of-Ponds, where the bed level is 1,710 feet, down to 

 the lowest at the Cataract at bed level 800 feet, and, as I 

 have already stated that the Wingecarribee area of 55 

 square miles can be conveyed by a tunnel into the London 

 Reservoir Area, it was evident that the solution of the 

 problem of sufficiency of water at an elevation to warrant 

 the expense of conducting it to the city at high pressure 

 had been reached. 



On looking into the question of the conveyance of the 

 water by pipes to the city, I found that, apart from the 

 fact that the metal at the present time is absolutely unob- 

 tainable and not likely to be available for probably some 

 years, the cost even at the pre-war prices was almost pro- 

 hibitive; moreover, there is the difficulty in crossing the 

 Harbour to be overcome. The pipes also as far as Banks- 

 town, 27.3 miles from the Cataract, would have to be laid 

 above the surface of the ground for purposes of inspection 

 and maintenance. 



In earlier times this would not have been objected to, 

 but there can be no security in the present day for works 

 of this description, for reasons already referred to. It 

 then occurred to me that if the water be taken through a 

 specially lined tunnel, located in sound rock at a sufficient 

 depth to withstand the pressure due to the head of water in 

 the reservoir, the difficulty might be overcome, and after 

 making out an estimate of the. cost I felt sure that the 

 scheme was feasible, and have since beeen confirmed in that 

 opinion since reading Mr. Charles Prelini's paper on the 

 New York Water Supply, volume XCVII, Engineering, 13th 

 March, 1914, to which my attention was directed by my 

 friend Mr. H. G. McKinney, in which the method adopted 

 for conveying the water across valleys, and, in two places in 

 particular, across the River Hudson and the East River, 

 were fully described, and is exactly similar to my proposal. 



