The twice-a-week Twin Falls times. (Twin Falls, Idaho) 1916-1918, 1917-12-06
STOCKHOLDERS CANAL
MEETING CONCLUDED
CONTINUED FROM Page u

Betterments for this division also
involve concrete structures at head
ing of 5A and 5B and at heading of
No. 9. and Furthermore for building
up ragged and low banks on laterals
No 3 and No. 5.
On the whole, comparatively little,
of sufficient Importance to mention
here, is to be found fault with, in
examining the laterals of Division No.
4 There probably is more cleaning
required of these laterals than others
OF the project but this is naturally to
be expected This is not the fault of
the Iaterals but merely the result of
being located with reference to the
main body of the project 50 as to re-
ceive a large deposit of silt.
Low Line Canal
An examination of lthe available
records concerning the capacity of the
low line, showed the condition to be
very generally good, but the field
animation showed quite another story
Probably the low line receives more
silt than the high line but it has
practically never received a cleaning
since it's construction.
From Cedar Draw to the lower end
of the low line, the silt deposit is
and east of Buhl), to the lower end,
numerous places where the silt in the
bottom of the canal exceeded foot
in depth, especially in the region of
the sO-called Belknap bridge. Testing
the section at several points showed
that the combination of silt and rag
ged upper bank would not handle
~125 per cent delivery.
- From the II" cOulee back to Cedar
Draw, the deposit of silt is serious but
on account of pretty generous free
board, the capacity maintains. In this
section, the silt deposit is character
lsed by berms, very pronounced in
the region of curves where there is
tendency for the water to eddy re-
su1ting in a lowering of the velocity
on the inside of the curve and as the
velocity is decreased, the water is
able to carry smaller and smaller
load In addition to the silt, have
high bottoms in the rock cuts and it
may be said that practically every
rock cut in the low line from Twin
Falls to Bull, has the condition pre-
vailing- 1t is not merely a matter of
a few high points. but quite the con-
trary: a few points will be found to
be as low as the proper grade.
1t is nothing short of a crime to
neglect maintenance work it has
been neglected this canal. When
these silt berms are being formed
the inside of the curves, the water
is constantly being crowded more
against the outside of the curve and
cuts away the bank that side. OF
course you mend it and protect it as
best you can but a repaired bank is
not as good one properly main
tanned. The eroded bank gets some
attention because it is dangerous to
ignore it, but the silted bank gets no
attention and becomes a favorable
@DON@
make cleaning more difficult. But the
whole section from Cedar Draw to the
lower end is being cleaned this fall
<and the rock above grade is to be re-
v moved, if the weather offers suffi-
cient time 1t is encouraging to be
able to report that at this time most
of the task is done and an outfit of
about 100 teams is on this work: fur
thermOre, a good thorough piece of
cleaning is being done. In fact the
writer was very favorably impressed
wo~I,r, Of, oil fl,o oil
UP work
At Cedar Draw the revised capacity
Nca11S for an increase of $50 second
net Here the draw was crossed by
using a wooden retaining wall on the
lower side of the canal. This social
ed wood fence" was a factor of con
troll in the capacity situation, because
there were times when this wall was
really a spillway, but this wall is now
being replaced by one of concrete al
lowing, for greater capacity
From Cedar Draw to Rock Creek
the canal does not need a cleaning
AS a general thing, the freebOard is
generous, being from 2.5 to 40 feet
The chief criticism of this section
would refer to total of 2700 feet Of
ragged and lower upper bank reuuir
ing building up, and consistently higf
bottoms in the rock cuts Some bank
protection is also required at curves
A test of the rock section immedi
ately below the Rock creek siphor
shows the section sufficient, but the
freeDOard reduced to a rather sim
margin, on the lower side, but the
lower side is concrete wall, some
what cracked and leaks a small
amount but there are but two cracks
observed that might involve a ques
ton of safety with the section running
full The writer considers the wal
safe but deems it advisable to occa
giona11y inspect the vertical craci
(which shows transverse displacemen
of an amount sufficient to attrac
ones attention especially if lookint
for trouble. The rock bottom section
here has fairly uniform bottom bu
the upper bank is very uneven, 81
uneven in fact that a determination
of capacity does not satisfy. The
test made showed capacity for 149
against requirement. of 1872 sec
>ond feet, which may possibly call TO
r. comparatively small amount o
trimming of the upper side.
The siphOn at Rock creek is
good condition, but attention is call
ed TO two matters directly affecting
it First, the lack of convenien
10 or a If ha