HYDRO ELECTRIC INSTALLATIONS. LVII, 
a gold mine could be tapped. Although the possibilities 
of Trawool have been staring everyone in the face for 
generations, for the railway runs close by, nothing was 
done until Messrs. Coane and the writer came forward 
with a detailed scheme and data to back it. Now having 
fathered the scheme the Victorian Government will prob- 
ably build the dam, for detailed surveys are in hand, but 
whether the power side will be given to a company to 
develop remains to be seen. It need hardly be pointed 
out that if the Trawool proposition is carried through 
it may have important and far reaching resuits, for there 
are many valleys in New South Wales which could be easily 
dammed up and from which power could be obtained, some 
of these valleys being also well situated for irrigation. 
It should be mentioned that the idea of building a large 
dam for power purposes only, is common enough in other 
countries. Thus at the Spier Falls on the Hudson River 
there is a dam 1820 feet long and 155 feet high above bed- 
rock, which is simply for the purpose of developing electric 
power. Note, this dam is about the size of the one we 
proposed at Trawool, yet the amount of water which it 
impounds is a mere fraction. If, therefore, it pays other 
countries to build such dams for power only, so much the 
more should it pay Australia to build much more effective 
dams for both irrigation and power. ‘Tables II and III give 
particulars of some of the largest dams in other countries, 
and it is of interest to compare them with those in Aus- 
tralia and with the proposed dam at Trawool. The latter 
is easily first for storage capacity with minimum size of 
wall even if the conservative estimate of 60,000 millions 
of cubic feet is taken. 
