XX. ABSTRACT OF PROCEEDINGS. 



there would be no engineering difficulty in undertaking 

 the tunnel system. 



Mr. Corin, m. inst. c.e., m.i.e.e., etc., (a visitor) raised the 

 question as to the possibility of the pressure on the walls 

 of the tunnel at the lower levels producing fissures through 

 which the water might find its way to pervious strata at 

 lower depth. He stated that he had been recently engaged 

 on a scheme involving a tunnel between the Cataract and 

 Cordeaux Reservoirs, for utilising the combined waters to 

 produce electrical energy at a power station to be situated 

 at Broughton's Pass, whereby an average of 16 million 

 units could be supplied for pumping purposes in Sydney at 

 a cost of 0*35d per unit. The use of these waters was not, 

 however, essential for cheap power, and he anticipated in 

 the future that, by developing the Shoalhaven River, and 

 later the Snowy River, and by turning to account the 

 energy now being wasted at the South Coast Coke Ovens, 

 in ten years time electrical energy would be supplied in 

 Sydney in bulk at from 0*2d to 0*25d per unit. 



The figures in Mr. Keele's paper were based on sources 

 of power largely uneconomical. By substituting the lower 

 price of power for that mentioned by Mr. Keele, the last 

 figure in Column "Y" for the year 1947, would, instead of a 

 surplus of £125,560 in favour of Mr. Keele's scheme, be a 

 deficiency of £20,440, apart from the difference in the cost 

 of the capital charges, Column "L," which would make the 

 comparison still more in favour of electric pumping. 



He brought forward this aspect of the question as deserv- 

 ing close inquiry when the question of the cost of Mr. 

 Keele's scheme, versus pumping for future supply,^night be 

 under consideration. But he did not for a moment desire 

 to detract from the value of Mr. Keele's proposals. On 

 the contrary, even if pumping were proved to be cheaper, 

 the advantages of the permanency of the work and its 



