Shoshone journal. [volume] (Shoshone, Idaho) 1884-1931, 1923-02-09
COOPERATION OF WATER
USERS
Continued From Page One)

diversion points; 1t was decided that
the combination submerged orfice
and head gate would be the most
satisfactory type of structure. These
have been constructed in most cases
out Of cement. Adjustable OFFICES
have been provided to give a range
Of variation in the flow and stin give
the required effective head to obtain
the desired accuracy. The size of
these structures range in capacity
from few inches to over 200 second
feet
After a number of years of careful
experience with the submerged Or
flee the writer is convinced of the
superiority of this type of measuring
device for small river diversions if
properly designed and constructed.
For large diversions the rating sta
ton is the most satisfactory.
In designing the submerged orfice
to obtain accurate results the flow
must approach in a direction at right
angle to the plane of the orfice. The
velocity of approach must be very low.
The velocity below the orfice must
be low and the space as well as the
area between the orfice and any OBJ
stacle below must be enough to pro-
vide against a rolling or surging mo-
ton of the water. The space between
the crest Of the orfice and the floor
of the structure and the sides of the
orfice and the walls of the structure
must be sufficient to allow proper |
contraction.
AT the present time the system is
with 81 rating stations of
which IA are on the river and IS at
he head Of canals. And Is automatic |
stage recorders are In use. One Of
he most important thing to observe
n the construction of rating station
$ to install the gauge In a permanent
manner so that 1t will not be affected
" the winter freezing. Correction
actors give rise to a great many
Mistakes In computing discharges. ,
When winter records are kept and the ,
auges are only checked with a level =,
nee year 1t is hard to tell what .
ate gauge may have gone off, and r
iakes 1t impossible to compute rec
ride accurately.
Under provision Of law. now the Il
Commissioner OF Reclamation, but h
nat was formerly the State Engineer v
as instructed to divide the water u
reds OF the state into what is known 1,
water districts. A stream OF "a
length could be divided r,
TO two or more districts. nj
Big Wood river is divided into two IL
stricts: district IA. below the Magic
servoir and district 7B, above the
servoir. Silver creek and lower Lit O,
Wood river constitute what is :
own as district lab.
Under the statutes, on the first Mon
y OF March OF each year a meeting
the water useiT IA each district
I"uEboDt the state is 70 be held az
ne stated place and a water master
etsd' IN the above named districts
aeefsed priority users organized
'efste ineofporations. A Joint A..
ia'ion consisting Of the thfes a.
pofaiionsi 9he ijls Wood Canal
'pany ana fhe North Side Canal
'rSnt eA4 o'ssnlsed snd ioint
''insf efee held ~ alscuas o. iaks
any matter ibai peffalnsd 40 IN.
'r'f [" AZ nlsmhers a meeting
'NF na'1'e y held each yes4 ~
'' "Npw ihey NlN nomDaie for
master a. ine s'erNon Io Aaleh
''f a'l'if a'a aoy oh., maii..
"Hf F'H a. hYs np IN ~
'N MfnNff
y" NNf A. nW ~ lslla ~
'ff Ne'f HaNae Ie.1. ll. =
~ Hf N.f ~ il. 0.
'H aM oln mII.U
N NNN NNI M n
al Hf Nl0
' m IN'.I.tiN I l