344 
The Hilo Electric Light Company, on the island of Hawaii, 
develops 750 horsepower to operate generator of an aggregate 
capacity of 450 kilowatts to supply light and power for the City 
of Hilo. 
The Territory of Hawaii has installed and in operation in Xuu- 
anu Valley, Island of Oahu, water power driven generators of 400 
kilowatts capacity for supplying arc lights and Territorial Govern- 
ment lighting in the City of Honolulu. 
There are several small water power developments in mills 
varying from 10 to 50 horsepower which are used for operating 
machinery or electric generators. 
The aggregate horsepower of these developments is approxi- 
mately 6,500 horsepower. 
It is impossible to make an estimate of the prospective power 
development and at best only a few can be mentioned. These 
are such powers as have been rendered available through partial 
developments made for irrigating purposes or where the possi- 
bilities are self evident. The conservation and development of 
Wilier at high levels for irrigating purposes will render many other 
plants both possible and expedient. A close approximation of the 
ultimate possibilities can only be made when complete surveys of 
the watersheds, records of the rainfall and the cost and economic 
value of the developments are obtained. 
The island of Kauai presents a fertile field for future develop- 
ment and there are at the present time some 2,000 horsepower 
additional at Wainiha which is not being utilized ; possibly 4,000 
horsepower at Hanalei, and 1500 or t8oo horsepower at Maka- 
weli, 500 or 600 horsepower at Hanapepe, and by the development 
of reservoirs back at Waimea, Wahiawa, Koloa, Wailua, Kapaa, 
Anahola and Kalihiwai several hundred horsepower can be made 
available. 
On the island of Oahu possibly 2,000 horsepower can be 
developed at Wahiawa and from the new high level reservoir in 
Xuuanu Valley. 
On Maui the Hawaiian Commercial & Sugar Company at 
Kanai and in Iao Valley can develop about 2,500 horsepower ; 
and there are several hundred horsepower available at Waihee in 
the development of the Wailuku Sugar Company. Some 1,200 
horsepower could be rendered available at Lahaina from the 
development of the Pioneer Mill Company. 
The power resources of the island of Molokai are practically 
undetermined. 
On the island of Hawaii it is estimated that in the Waipio 
Gulch some 8,000 horsepower can be rendered available by the 
present irrigating ditch development and on the north coast from 
Waipio to Hilo there are large quantities of Water going to waste 
or in use for fluming cane which could be developed. No estimate 
of the amount of this power is available, but it would amount to 
several hundred horsepower. 
Storage capacity constructed in the Kohala Mountains would 
render power available, but at present the quantity is entirely 
undetermined. 
