The Delta independent., 1923-12-07

Va SASohPoHbic fIOJeCt, Vol. IL, rage
2O7.
South Cana injury due to con-
traction. swelling and settlement
could probably have been largely pre-
vented by providing contraction Joints
and adopting flatter slopes.
'iBulging sides have necessitated
for immediate safety the placing at
many points OF wooden struts which
measure is admittedly temporary, es-
pecially because they impinge on the
tlowaSe section when canal is run
tull."-History of Uncomphgre Prof
ect, Vol. IL, page 224.
The first failure of concrete of
any magnitude was in a culvert at
Station 257 on the South Canal. The
bottom gave way, breaking in the CEN
ter. A crack also developed along the
arch.
In July 1910. a culvert at Station
373 gave way, the side and crown
caving in under the pressure of wa
ter."-History OF Uncompahgre Prof.
ect, Vol. II, page 22S.
1T was found when the South Ca
nal was put in operation, that the
grillage of the standard drops collect.
gu all drift material that found it's
way into the canal, and that It was
almost impossible for a man to clean
this drift without shutting off the wa
ter. 1t was also discovered that the
falling of the water on the grillage
set up excess vibrations thru the
whole structure and threatened its
destruction.
The present form of warped sec.
tion used on the South Canal is not
satisfactory. II is too abrupt and
sets up eddies that eat away the
banks below the lined channel"-
History of Uncompahgre Project, Vol
II, page 231.
Irrigation from the West Canal
system started additional slides on
the upper slope of the Montrose and
Delta Canal in the sidehill section, ne
cessftating the building of additional
drains to relieve the condition. A
break occurred in the canal bank of
the King lateral extension and
flume sheet failed in one OF the
fumes on this lateral. The sidehill
sction Of the Selig Canal, few miles
below the headgate, gave considerable
trouble due to the slipping banks A
small flood washed around l6 drops
on the laterals on the lower Selig
Extension Canal. Several drops on the
new laterals Of the East Canal system
were washed out and replaced."-
Annual Report. r. S. 1876.
"a 36-inch concrete pipe culvert un.
er the Loutzenhizer Canal disintegrat-
ed and was replaced with 36-inch cor
rugated pipe culvert."-Annual Re
port. r. S. 1857.
A flood in the Loutsenhizer
Arroyo in July and another one in
September made 1t necessary to re-
construct the flume where the Garnet
Canal crosses the arroyo. On
September 8 flood water entered the
South Canal above Tunnel No l and
caused the bulging of about so feet of
sidewall. Annual Report, r. S. 1918
| 10.
ON June 6. 1920, 150-foot section
OF the concrete lining OF the South
Canal failed, the water washing out
a large hole in the earth before the
flow could be stopped. A second sec
tion of concrete, 80 feet in length
slipped into the canal a few hours
later"-Annual Report. II. s. 1890.
"A disastrous slide occurred on May
25 on the side hill where the Montrose
and Delta Canal reaches the top of
Spring Creek Mesa After an attempt
of several days to raise the sliding
ditch bank and maintain an uninter-
rupted flow of water, the slide had
reached such proportions that II be-
came necessary to excavate the ditch
section farther back into the hill for
substantial foundation and build a
bench flume, Annual Report II. s.
l921-22.