Daily capital journal. (Salem, Oregon) 1903-1919, 1915-09-25
Highest Dam In World
Viii Soon Be Dedicated

dumped into the dam, Where it was
possible great boulders were used in tho
construction. A mountain side of gray
N was moved, screened and dumped into
gravel trains aud carried Is miles to
the mixers. These dumped with the
regularity Of clock. Electric ears
then rushed the concrete into u tunnel
to the distributing tower. Galloway
buckets sailed through the air between
the tower and hopper 1t was then
distributed from the hopper by chute
to various points on the dam. In less
than three minutes from the time grav-
el left its bin at the mixing plant, it
was in its final resting place in tho
concrete of the dam. Every day saw
the dam 1000 cubic yards nearer com
pletion
A sand cement plant with capacity
of 1000 barrels per day of "a hours
or total output of 5S5,240 barrels
saved the government thousands Of dol
lars. Crushed granite run through
this plant and ground with Portland
cement, was mixed 45 per cent sand
from the granite and 55 per cont Port
land cement giving q better and strong
er mixture than pure cement. The mill
was erected below the dam. Granite
from the spillway excavation was pass
I ed to it through u chute, run through
rock crusher and. sand rolls, dryer
and ball mill and pulverized to pass a
I 20-mesh seive. Mixed later with Port
land cement it passed through 200
mesh. Afterwards II was stored in
large covered bins and as needed was
blown by air pressure through Il tube
across the excavation to the mixers.
All sand cement passed thorough test
before used The pant is now being
dismantled.
Before the foundation was laid, holes
were drilled 80 or 40 feet into the gram
lite bed and grouted with pure cement
under air pressure to fill all possible
erevices. These holes were carried up
into the dam together with secpoge
test holes into the inspection CALLER
les where grouting machines can be set
| up aud grouting resumed il water is
found to seep through. II seepage De.
velopes the water viii be carried off
through the galleries
The dam was started four years ago
and completed Owen n year ahead Of
time at saving under the estimates
of S250Q,000. The total cost was five
million dollars. Behind il is mpound-
ed enough water to flood the city OF
Boston with feet of water, over 2i4,.
800 acre feet. II spread over 360
squire miles il would cover that area
Il foot deep The reservoir so created
is Is miles long bounded by mountains;
the water is 200 feeu deep. This water
together with that in tho Deer Flat
reservoir below will irrigate 100000
acres of land in the Boise project, lo-
Gated in western Idaho tributary TO
, Boise. When used for irrigation pur-
r poses the water is allowed to pass from
I the outlets in the dam back into the
b river below which carries il l5 miles
6 down stream where diversion dam
diverts it into the New York canal
] a cement lined artificial river. which
4. in turn takes il ON IS miles to the val.
r ley below for storage in Deer Flat res.
0 eryoir from which it is passed through
l the distributing canal system to the
. lands
= II il the dedication of this dum that
j Boise and all Idaho proposes to make
< u gala day with appropriate cercmon.
c les commensurate to the occasion.