Imperial Valley press., 1918-12-16
Preliminary Statement
Of
Facts and Conclusions

Facts and Conclusions.
The total area of Imperial Irrigation
District is 584,700 acres.
The net cultivatable area in Imperial
Irrigation District is about $4,000 acres.
The net area for which water will be
reuqired in Imperial Valley is about
100000 acres.
The total gross area to which the
cost of an All-American Canal would
be charged may exceed by some con-
siderable amount the net area. This
gross area has not been estimated,
neither for the Imperial Irrigation Dis
trict nor for the outside lands.
The cost of constructing an All-Ameri
can Canal for the irrigation Of the arid
lands in Imperial Valley is based on the
assumption that the canal will have a
capacity Of 5000 second-feet. But it
should be understood that future in
crease of capacity will be possible.
An All-American Canal to meet only
the requirements Of Imperial Irrigation
District, though with some allowance
for an expansion of the district, has,
been planned at capacity Of 5000
second-feet.
The maximum water requirement for
irrigation of the Yuma project inc!ud.
ing $4,000 acres of mesa land is esti.
mated at 1000 second-feet subject, how
ever, to future extensions.
The enlargement Of the Yuma project
canal from the Laguna Dam to Siphon
Drop has been planned at capacity
of 10000 second-feet for the All-Ameri
can Canal If constructed to serve 100000
acres in the Imperial Valley and at a
capacity of 1900 second-feet if it is to-
be built for the Imperial Irrigation Dis
trict alone.
The Laguna Dam should be raised
about two feet and the shape of it's
crest should be modified so that there
will be less opportunity for drift to
hang on the crest. There should be a
low section Of the crest of adequate
length with movable device to provide
for control of the line of flow and to
permit of some regulation fthe river
height above the DAM
The Yuma project will require GER
tain amount of power to pump water
from the level Of the canal system Of the
Yuma valley to the Yuma mesa. To
provide this power a power station, To-
Gated near Arez. is proposed by the U. S.
Reclamation Service as a project feat
ure Power is to be generated with
water brought from the Laguna Dam
through enlarged headworks. an en-
larged Yuma canal to the Siphon Drop
and a canal with capacity OF about
1000 second-feet from the Siphon Drop
to the power station, where 1t is esti-
mated that an installation for the utiliza
ton of about $500 water horsepower
will be required for the generation of
electric energy.
The appOrtiOnment of cost Of utilizing
the waterpower of an All-American canal
and of transmitting the electric energy
to the Yuma canal project should be
made on the assumption that these ten
tative plans for the Yuma project will
some day be carried out. The Yuma
project on this assumption would main
tain an interest in canal capacity to the
extent of 1000 second-feet of water to
Araz and in power plants to limit oil
an installation for the utilization of
$500 water horsepower, regardless OF
where the power plant is used to gen
crate electric energy.
The distribution OF the cost Of making
alterations at the Laguna Dam and of
enlarging the Yuma canal and building
new canal down to the power site at
Araz, should be to power and to irrl'
CATION in equal amounts, for the water
used in the vicinity of Pilot Knob for
power or made available for such use in
that vicinity.
Power development with water of the
All-Amercan canal should not pe