STATEMENT oF Concessions oF Hypravric POWER ALLOTTED BY THE GOVERX=MENT
 AND STILL IN Force ar tae Exp oF 1928—Continued

Name of the river

Concession granted to

Status of undertaking

OTHER ISLANDS

Loehoek Parakoe (Sumatra'’s west
coast).
Koerandji (Sumatra’s west coast)
Asahan (Tapanoeli)_..______..—.-Aer
 Pasermnah (Palembang)...
Koeritan (Sumatra’s west coast) -
Aer Dingin (Benkoelen).. ....._.
Aer Moesi (Benkoelen) . . .........
Aer Dekoe (Benkoelen). ____.__...
Sinamar (Sumatra’s west coast)...
Aer Lalangi and Aer Loesang
(Benkoelen).
Aer Loesang and Aer Gloemboek
(Benkoelen).
Batang DBangke and Batang
Bangko Karoeh (Sumatra’s west
coast).
Ack Siborgoeng (Tapanoeli).......
Mamasa (Celebos) nooo

N. I. Portland Cement Mij_..__.

[n operation since 1912.

dO cei
Asahan Exploration Co. .oocunan--Pebat
 Goenoeng estate. __.._._._-.
sequator Mining Co...
joeban Ajam estate .____...___...
Aer Simpang estate. ____...__....
Joeban Ajam estate... oo...
Halaban estate_. o_o...
Jimau Mining Coco...
ood0o oe eewiio wore. In operation since 1915.
Koerintji estate... ...._._..-.1 In operation since 1923.

'n operation since 1921.
Construction not begun.
Do.
Do.
(n operation since 1926.
Construction net begun,
fn operation since 1927.
Construction not begun.
[0 operation since 1909.

Jovernment. oo. aoceoooee-Jitrogen
 Svndicate._ cacao...

Under construction.
Construction not begun.

POTENTIAL WATER POWER

The potential water-power resources of the territory are now placed
at 6,600,000 horsepower and show an increase of 1,000,000 horsepower
 over estimates made several years ago, indicating that as
further survey work is done by the Bureau of Water Power and
Electricity, additional water-power resources will be located, particularly
 in the Outer Possessions. The recent estimates place the
resources as follows: Java 600,000 horsepower, Sumatra 2,000,000
horsepower, Dutch Borneo 2,000,000 horsepower, Celebes 1,000,000
horsepower, and the remaining islands another 1,000,000 horsepower.
The actual potential water power that has been mapped for Java is
783,588 horsepower, but apparently the Bureau of Water Power and
Electricity considers that some of the sites are not accessible and
accordingly has revised its estimates downward to 600,000 horsepower.
 Conversely, electrical engineers in Java are of the opinion
that the Government has underestimated the water-power resources.
In any case, the actual water power thet is available is more than
sufficient to take care of the requirements of the country for many
years to come. West Java has more available potential water power
than the east and central portions of the island, 379,283 horsepower
having been mapped there as compared with 137,578 horsepower 1n
east Java and 120,435 horsepower in central Java. }
The total of known potential water power in the Outer Possessions
at the end of- 1928 was placed at 2,574,350 horsepower, of which
1,400,000 had been mapped. The Bureau of Water Power and
Electricity had, however, further surveyed 19 sites with a total
potential power of 916,000 units, of which one site is reputed to have a
capacity of 160,000 horsepower. Six concessions for 242,650 horsepower
 have been granted to private individuals for the development
of the water-power resources of the Outer Possessions, but actually
only 6,700 horsepower is being utilized by private concerns.