19900827Comments.pdf

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BErOR!, THE IDAH pu:C UTILIJI COSSION HECEIVED Ml
o
Pll i
¡LED
IN TBI KATER OJ TD APPLICAIOI or ID POWER )
COMPAl lOR Al1HOITl TO RAEBASlTD IWESTMENT)
REQUIED fOR TD REBUI Of TIE SWAN rAL .HO)ELECTRIC r ACIDTl )
CAIFNO. IPC-90-2
90 AUG 27COlS or ID
CONSUM AlfAI, DC., \' iJ f"¡ P u'l 1,: li' G"'¡ ior'\i i L , . u:U;L;T~y~¡
com NO, Idaho Consumer Mfdrs, Inc. (leA) by and thrugh its intervenor
representative, Hr. luold cr. Hiles, 316 rifteenth Ave. South, Nampa. Idaho 836.5
submi ts the following comments an data information for this COmmssion's consid-
erationre1ative toOâse 10. IPC-E.90-2 in compliance with the IPUC's notice of
Au.t 2), 1990.
We,' have made a breakdow of the water flows at the Muph;. Idaho USS gague
for the water years 1961 through 1989, the years we';deem most appropriate since
they more accurately reflect the 'impact on the Snake River tlows of"..àiih lit ir-
rigation puming since 1961. We used the followng catagories ot Snake~River tlowsi
Sw rals yreement tlows ot 3,900 cts r lpril 1st through October' 31tl to be
able to generate 7.91 ~ ot electricity at 26.2 tt ot head.
MlJlUJ da tlow average tor these ", 29 water years ot 5826 cts capable ot
generating 11.90 IW. However, when ve computed the generating capability tor
each indvidUâ year the result was 11.97 ~ at the 26.2 head, tor a gain ot
.07 IW.
Maum daily tl~ average tor these 29 water years was computed to geneate
41.93 IW. at n.o tt 'ot, head; computed.oi 'an, aiua basisvea...t .34 ..
There?were 12 years out of the 29 when the average miri daily tlows yer~be-
low 5,600 cts, but this average vas greatly influenced by the sWIr irigation
tlow.~Apl 1st through October 31st.
therewas only one:èyear (1988) when the UWJI daly nov wasn't sufticient
to generate the 25 ~ rated generation capacity ot the"proposed Swan rals re-
build plant.
The result ot this very preliminar study might indcate it would be wise for
IPC to consider rebuildig this structure to accommdate aiditioftl1-I..atti"UDt.
late date. or instal one or two more812.; ~ ints now, since W8" don't kn :i1/ I
the 25 tt da will âllov larger than 12.5 * unts to be installed. (ICA', exhibit 11)
(1)
. .Wedon1t presume to be out.engineering IPCwho have competent h;dro elec.
trica engineers. Perhaps they anticipate recapturing the spilled water at the
Swan rals dam in their BtowneeRenrvoir. However, since IPC is required to
drawdovn Brownee Reservoir tor spring tlood control, a requirement of their rmc:eitherlicense, f\motication of this nood control requiement, which in our view is no
non-essential due to the build ot the 'ederil dam on the . Columia and SDe
Rivers since the bad nood on the lower Columia River at Vånport, Washington in
about 1926, or morecgenerating unts in IPC's upstream dams below Shshone rals
/ seems reasonable. Therefore, we otter the opinion that hyo generated electricity
is going to become more viluable every year in the tast developing Western states!.
probably more valuable than some agricu1tural crops irrigated by high lit water
pumed trom the Snake River, especiily it irrigation electricil rates are based on
tul cost ot service in IPC's territory, and not a subsidised rate as in the past.
iiectricity is a product tor sale just the same as potatoes, sugar or wheat.
an the Southwest is a viable market for any temprary surplus IPC power which can
be sold above the tull cost ot production by IPC. This willt'e.u¡Jial true by
the time the Swan 'alls dam is competed, in view ot the fact IPC at times purchases
ør'~ges SPA poeii; also the Canadian Entitlement Alocation Agneement between
BrA and Canada will expire at the end ot this decade. This r.ethction in Canadan
poer to the Northwest will mae ill hyo generated poer even more" desirable an
valuable. An since we believe it is imperative to make uieot our opportunties
to generate power trom a non-polluting renewable resource. now is the time to:_ __
take advantage 'f .'jl cts tlows in this reach of the Snke River. The construction
ot hyo generating tacilities is not likely to become an less expensive per KW of
generating capacity in the forseeable future, when computed on an aDDuilzed basis
over the life ot a !! constructed hyo plant, 80 to 100 years. ~o poer will
be 1Ih less expensive than therma poer, which this commssion and IPC have',- stated
in the past is our option in the forseeable tuture; however, in this regard we teel
they are not putting enough emphasis on conservation possibilities. A run of the
river hydro plant will be far less environment ily damaging than a coil plant, an
its output far more marketable anhere: in the Northwest or Southwest.
(2)
..We teel there have been man lost opportunties tor h;o generation on the sne
River trom American rills to udincludng Hells Canon in the past, and we are
ooncerned that no more of these opportunties be lost.
Mr. C. E. Sissel of IPC on March 31, 1982 applied for a water permit to the
Idaho Department ot Water Resources (IIM) for 6550 cts additionil to the ùread
decreed 9450 cts, main a totil of 16,000 cts tor the Swan J'alls Da rebuild, ap.
A;td7-plication l 02-7379. (leA's exhbit;~page 2). Hoever since the average ma-
mum daily flow for the water years 1961 through 1989 was 27,945 cfs, we teel IPC
even then wasn i t considering the ful hydraulc potential of this reach ot the
Snake River in its Swan rals rebuild plans.
ot even more concern to us than thediydraulic capacity ot the Swan 'alls Da
rebuid is th~~uture ot IPC's water rights tor this tacility. It is indsputable
that IPC very foolishly compromised its decreed or licensed water rights ot 9,450
cts to provide water pumed trom the Snake River for high lift agicultural ir-
gation projects resulting in diminishing sumer Snake River stream tlows, as the
USGS' irater recor4smeasured at its Muphy gague over the past 29 water years will
show. (Judcial notioe ot these records is requested, a copy ot which has been tur-il".Dished the IPC and the IPUC; ilso see leAl s exhibit:J page 2)
The revision of the'tormer agricultural policy )2C to Policy D adopted by the
Idaho Water Resource BOard, IW, published December 12, 1986, troii which we quote
in par l IlIdaho Code Section 42-20)C: limits the rate ot new development in the
basin above the Muhy gauging station to 80,000 acres in any tour year period.
Therefore, the maxmum development to the year 2020 assumng no water supply con-
*#/Y3strdnt ie 700,.000 acres. (leA exhibit :b). In addition, the "public interest cri-
teria" adopted by the IW~~ in the past and by the man agriculturil development
interests, weildig such strong politicil power in the Idaho Legislature '. much too
strongly slanted toward adtlonala¡ruultural development to believe that this
development will not occur an the water to irrigate these acres will come trom
the Snâke River or the+'Snake River Plain acquier. In tact, we,.teel and our feel-
ing is shared by others that the agricultural interests in Idah. particul.arly the
())
..well organzed agricultural development interests, want to control al the water-
in al ot Idaho's stream "1n perpetuity". Henoe, we teei IfC's hyo water
rights could be in jepordy.
aWe oall thecommssionls attention tof'roposal we tound tloating aroun in
a IWD meeting Mr. Hiles recently at tended which was after the adoptioR ot the
IlState Water Planll by the IW; published December 12, 1986, and subsequently
adopted by the Idaho Legislature, which gives it the torce ot law, as we uner-
stand it. We quote, in part trom this printed proposal, IW existing and tuture
rights to the useot water tor power purposes, however appropriated or evidenced,
are and shall be subject to the condition that such uses will not conflict with
,"'":,:.,;.:.,
depletions in the tlow ot the waters ot the natural stream and its tributary sources
trom whioh such water is or m~ be used tor power purposes, and wi not permit or
intertere with the subsequent upstream diversion an uses ot such waters tor other4~
beneticiil purposes. II ~ endquote. (see leA exhbit .J Since the RS9032 proposed
Act did not define its term "aeneticiil purposes", we assume it meant agricultural
use. Therei'ore, singling out water for power purposes (or hydropower generation) in
the proposed ACindioates to us that hyopower is not very high on this proposil's
list ot beneticial uses. Also, it appears the author or authors of this propoa.
Att, attorneyls for the IPUC didnlt believe it had become Idaho 1. so tar, do not
regard Policy LC ot the Idaho State Water Plan, "Beneticial Use' of Waterll to include
hyopower generation,. nearly as high as agriculturil use'. which incidentaly is a
very high consumtive usec,ot water.
. mentioned at the prehearing conference tor c-ase No. IPC-J;90-2 on AUgust
22nd, Hr. Hiles pointed out some ot the restrictions in the iam Direotor' s order
ot .Ail 10, 1989. stated in the issued permit 102-7)74, which IPC applied for on
Kach )1, 1982. !eread condition'S into the record, but we would like to again
quote it, liThe water right acquired uner this permit shil be junor an subordi-
nate to al rights ('e1lis aded) to the use"ot wa1ìr from the Snake River an
sources tributar thereto upstream from Swan ralls dam within the Sate of Idaho
that are:iniated later in time than the priority date of this permit and sha not
(4)
..give riseHto any right or claim against tuture rights to the use" ot water within
the state ot Idaho iniated later in time than the priority of the permit." end quote.
(see. IPC's application tor Swan J'ills Rebuild, attatchment #2) Although condtions
18 and Sl apparantly limit the permit to the terms ot the Swan rals agreement, we
wonder wh; restriction is was inserted in the permit in the first place it it was
not intended to impair the USe ot the ),900 an 5.600 cts mentioned in the Swan
ralls agreement at a later date.
Theretore, the question of sufticient water to activate the Swan rals rebuild
generators to produce the 25 IW ot poer may be in question. Wi water to oper-
ate this plant have to be be bought trom irrigators' (Sorb ot rough on IPC's rate-
payers It IPC has to buy back water it allowed irrigators to purloin trom them in
the tirst place, donlt you thinkf)
ot irrigated land
When about 170,000 acres"in IPCI s territory were set aside in 1985, aocordng
IPC i S,=' Vice-President, Logan Laam's testimny to Congress, in i 987, (see. Congress.
ional Record ot November 9, 1987. (which we incorporate into thil5 statement of posi-
tion by reterence), in our opinion it is not in the public interest to put any more
new land trom the public doma into additionil agriculturil development it water
to irrigate it is going to come either from the Snake River or pumed trom the
Sne River plain acquier, least ot il in low water years.
In conclusion, it appears to us either Idaho Water law has to be modiied to
more specificaly state or be interpreted to mean that hydto electrioal generation
located on Idaho streams, where these hyo plants will not causeenvionmentil
damge that canot be reasonably mitigated, are"'also beneticial users ot water.
and are in the public interest. Hoever since an event is not likely to occur in
the near tuture, the IPUC should set irrigation class rates to retlect the tull
cost ot servce tor ai classes of customers an inverted ratel5 tor new electric
space heat customers, at least. In addition, based on the low Snake River tlows
for the water years ot 1988 and 1989 and the tirst nine months ot ti. 1990 water
year, the IPUC should impse a moritorium on new electrical irrigation hook-ups
simiar to the one imposed in the low water year ot 1977.
(5)
..Wë feel the IPUC start is better qualified to review the construction con-
tracts that will be let tor this project than we, as well as the quility of the
construction work to be done, conseq,uently we leave these matters to their good
judgment.
We" do have a concern that the recreational tacilities as proposed in the
application are not entirely adequate, and since we have observed ma people
visiting an using the Swan ralls tacilties go down stream as well as usg the
grassy picnic area near the present residences, as well as the boat launching
facilties dowstream trom the dam, wlirecommend that additional picnic facil-
ities and rest r04U be provided in the shaded area downstream. trom the dam.
At this point, we'JIve tor the adoption ot the the exhbits included with
this statement and the inclusion ot this statement an exhibits in the record of
this case'.
Respecttuly submitted,
COJl t te e
Dated at i Nama, Idaho
A.ugust 27, 1990
This is to certif that On Aùst 27, 1990 we han delivered seven copies an the
originil ot this documnt to the Secretar ot the IPUC ilong with a copy ot the
flS water records at the MuhT gague tor the water years 1961 through 1989. an
t.WO copies ot this document an a copy ot the USGS water records at the Mupa gage
for the water years 1961 through 1989. Also ,wemaled a copy of this document,
tirst class postage paid to il the parties ot record, per the list turnished us by
the seere of the IPUC.
Dated at: Nampa, Idaho
August 27, 1990
(6)
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4 Pages
Page 1'~~..
CASE NO. ipW9O..
.,ICJ
Form 202
3/78 Ident. No. 02-7379
STATE OF IDAHO
DEPARTMENT OF WATER RESOURCES
APPLICATION FOR PERMIT
To appropriate the public waters of the State of Idaho
1. Name of applicant Phone [phone]Idaho Power Company
Post office address P a Box 70, Boi se, Idaho 83707
2. Source of water supply which is a tributary of Col 11mb; a R; verSnake River
3. Location of point of diversion is % of % of Section 18 Township 25
Range iL B.M. Ada County, additional points of diversion if any:
lots 10 and 11, Section 18, T 2$, R F, 8M, Ada and Qlo'yhee Coiinties
4. Water will be used for the following purposes:
power
generat; an .1an 1 to Dec 31 (both dates inclusive)
to (both dates inclusive)
to (both dates inclusive)
to (both dates inclusive)
Amountß.550 cfS for
lcfs or acreèat pe annum)Amount for
lcts or acre.feet per annum)Amount for
lcts or acre-feet pe annum)
purposes from
purposes from
purposes from
Amount for
(cfs or acre-feet per annum)
purposes from
5. Total quantity to be appropriated:
a.cubic feet per second and/or b.acre-feet per annum.6550
6. Proposed diverting works:
a. Description of ditches, flumes, pumps, headgates, etc.Power plant, replace~ent of
existing spillway, and upgrading the existing pOlierhol,se to serve as a
dam with di scontir¡iiance of ali prQli~nt operati on
b. Height of storage dam 25 feet, active reservoir capacity 900 acre-feet; total reservoir
capacity 900 acre-feet, materials used in storage dam:
Period of year when water wil be diverted to storage Jan 1
(Month/Day)
c. Proposed well diameter is NA inches; proposed depth of well is
to Dec 31
(Month/Day)NA feet.
inclusive.
7. Time required for the completion of the works and application of the water to the proposed beneficial
use is 5 years (minimum 1 year - maximum 5 years).
8. Description of proposed uses:
a. If water is not for irrigation:
(1) Give the place of use of water:.L
Range -- B.M.
(2) Amount of power to be generated: 17,835
of Section 18 Township 2S
horsepower under 24 feet of head.
(3) List number of each kind of livestock to be watered NA
(4) Name of municipality to be served NA , or number of families to be
il
\
\
i
1
supplied with domestic water NA
(5) If water is to be used for other purposes describe: NA
''I
'",..~ NO. IPC..&;90-2
"";"'C.,,,,:., ''''¡¡or.
.Bii NO..- ot 4 Pages
Page 2
b. If water is for irrigation, indicate acreage in each subdivision in the tabulation below:
NE%NW%SW%SE14
) TWP RANGE SEC.TOTALS
NE%NW%SW%SE%NE%NW%SW14 SE%NE%NW%.SW14 SE14 NE14 NW%SWY.SEY.
l
.
.
Total number of acres to be irrigated
c. Describe any other water rights used for the same purposes as described above. Water Ri ght N'o. 02-2032,
Old No 14362 (4,000 cfs, priority - 7/29/19); Water License, August 4. 1911. signed
by A F Robinson (1840 cfs. priority - 1/17/00) Water License dated August 6. 1911
signed by A E Robinson (1460 cfs. priority 4/17/00); CT Decree - Trade Dollar vs'
--. et aJ. (2150 cfs - priority 1/17/00)
9. a. Who owns the property at the point of diversion Idaho Power Company
b. Who owns the land to be irrigated or place of use NA
c. If the property is owned by a person other than the applicant, describe the arrangement enabling the
applicant to make this filng
10. Remarks This application is for water to be used in Idaho Power Company's planned
rehabil itat. nq, reconstructi n90 rennov ati ng, and upgrad i ng of its Swan Fa 11 s
Project. Power generation is to be increased from 10 MW to 25 MW without raising
the dam or reservoi r surface e 1 evati on. To do thi s. Idaho Power Company wi 11
utilize 16,000 cfs total, 9,450 cfs of which is already under license or decree.
i
\
\
\11 lI)
--'~-~.
C1Sf; ,NO. IPC;o¡'90-2.~/.,.ie "EAIT NO. ~ot 4 Pages-.. Page,
I L Map of proposed project: show clearly the proposed point of diversion, place of use, seclion number, township
and range number.
I I I I I i I .¡
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Scale: 2 inches equal i mile
BE IT KNOWN that Ihe undersigned hereby makes application for permit to appropriate Ihe public
walers of the Stale of Idaho as herein set forth.
e ,-E_ P ~U-
(Applicant) C E BisseII
Vice President - Power Plant
Construction and Operations
), ì . CA I" , NO. IPC-i-90~ lCA,enn NO.;í;.
--'. -"-'--~~'.'-"'~-~-""--~'--' .......-......._--_.._......,_..._-_........"
':,,~OLiçy 5D - Snake River Agriculture \
,It
, i. IT is, THE POLICY OF IDAHO THAT APPROPRIATED WATER HELD IN TRUST
~, t~
. r BY THE STATE PURSUANT TO POLICY 5B i LESS THE AMOUNT OF WATER;,l..'l. 'J~i ,~.
t~~ECESSARYTO PROVIDE FOR PRESENT AND FUTURE DCMI USES. AS I SET
l ~:':FORTH IN POLICY 5C i SHALL BE AVAILABLE FOR REALLOCATION TO MEET
;!EW AND SUPPLEMENTAL IRRIGATION REQUIREMENTS WHICH CONFORM TO.,,~ " .
::~¡, IDAHO CODE 42-203A, 203B, 203C, AND 2030.
r¡4:Y;'~1~
\
,
\
This .policy allows for new and supplemental agricult.ural
development through the reallocation o.f water held in, trust by
the stâte. The 1982 State Water Plan allocated wate
minimum level 0 new rrigation eve opment.-_L8_S-0, 000 acres' plussuppiementa~aLer for 225,-000 acres by the year~2020 ove~h~
\iichexisted in 1975. Thfspo11cy tes~trds-ne-9'azallocationsdStnce tfiere are nõ acres specified in that the type, location,
and amount of use is unknown as is the effect of the evaluation
c,alled f9r in Policy 58 prio.r to reallocation.'
,.
During the eight-year period from 1975 to 1983, about
140,000 acres of new development occurred within the basin.While the amount of new acreage varied signi fican,tly from year to
year, the, av'erage was approximately l7 ,.500 acres. Data' are not
available to estimate the number of acres that received
supplemental water during this period.
, Idaho Code Se'ction 42-203C limits the rate of new develop-
,. ment in. the basin above Murphy gauging station 'to 80 ,000ri',acres ,in.
i any
four yeärpe'riod. _Therefore, the maximum'"developmenttothe"
. year 2020 above Murphy gauging station assuming no water supolv',
. " · constrai t is 700,000 acres. Cri teria placed on the reallocation
of hydropower rights, limits on the rate of new- development, .piùsth~requirement that approval of new storage projects thatciivert
water'between November 1 and April 1 from the Snake River between
Milner Dam and Murphy gauging station must mitigate the impact of
diversions on hydropower generation (Policy 51), will undoubtedly
limi t development to less than 700,000 acres.
. ~. ~ .'
,."."
0,- "'
.' .-'
".,
:' ,i ...'1 ..,;-
31
1 "
.ClSl NO. ipC.m.90-2 ." ~-"
Itbi t No..- of 4 Pages
Page 4..'\
Received by_-1_ Date_~~ Time_~~~2.~
Preliminary check by_tf" Fee $_~~I.,:~::",_~~'æ~c:
Receipted by_~ Date '- 1/ 'è7.
Publicalion prepared bYjp.,_ Dole 4/29/82
Published in Idaho Statesman \- (;...-\:\"00 ~"",s
Publication dates ___5/6_..5/13/82-,,_ ____--,__
Publication approved~ Date~~____
Priority reduced to Reason____
Protests filed by: SOlith Bord of Cotrol, C&e Project by
Roderick B. Woo, Attorney
-?~k~_w,.ikd"'~Vl, JOl'Jb/'1W_
Copies of protests forwarded by--p
Hearing held by_ Date
Recommended for g denial byj)j?_____
ACTION OF THE DIRECTOR, DEPARTMENT OF WATER RESOURCES
This is to certify that i have examined Application for Permit to appropriale the public waters of the State of
Idaho No,, and said application is hereby
i, Approval of said application is subject to the following limitations and conditions:
a SUBJECT TO ALL PRIOR WATER RIGHTS,
b, Proof of cOnstruction of works and application of water to beneficial use shall be submitted on or
before
c. Other:
,19_.
2, Denial of said application is for the following'reasons:
Witness my hand this _ day of 19_.
Director
1..--
. t ..CAE.. NO. IPC.i.90-2 . lOA EXIT NO. 4 "if
RS Cr/J 3 ?-
A:\ ACT
(.
FORMALLY UIPLEMENTING THE PROVISIONS OF ID.-VlO CONSTITUTION, ARTICLE 15.
SECTION 3 TO THE EFFECT THAT THE STATE 1-IAY REGULATE AND LUIIT THE USE OF
WATER RIGHTS FOR POI\'ER PURPOSES BY ANENDIÌ\'G SECTION 42-205, IDAHO CODE BY
THE ADDITION O~ A NEW SUBPARAGRAPH (4) TO PROVIDE THAT ALL RIGHTS TO TIiE
USE OF !VATER FOR POWER PURPOSES ARE SUBORDINATED TO SUBSEQUENT DEPLETIONS
IN STRE~1 FLOWS FOR OTHER BENEFICIAL PURPOSES.
Be it enacted by the Legislature of the State of Idaho:
Section 1. That Section 42-205, Idaho Code, be, and the same is hereby
amended by addition thereto of a NEW SUBSECTION. to be known and designated
as subsection (4), and to read as fo 11 ows:
..
42-205 (4) SUBORDINATION OF WATER RIGHTS FOR POWER PURPOSES TO DEPLETION
FOR OTHER BENEFICIAL PURPOSES. It is the intent of the legislature to
subordinate the' use of '''ater for pO\,¡er purposes under the pol ice power of the
state for the optimum use, of water resources in the public interest. aAll
existinand future ri hts to the use of water for o'''er ur oses hO\\ever
appropriated or evidenced, are and shall be subj ect to the condition that such
uses will not conflict \\Ï th depletions in the flow of the waters of the
natural Stream, and its tributary sources from \\'hich such water is Or may be
used for po\\'er purposes, and will not revent or interfere with the subsequent
upstream diversion and use of such waters for other beneficial purposes.
~-
Section 2. An emergency existing therefore, which e6ergency is hereby
declared to exist, this act shall be in full force and effect on and after
its passage and approval.
". W~ ~ Iq¡'1
13-1715. C. J.
SNAKE RIVER MAIN STEM
Strike Reservoir near Granel View, Idaho
Lat 42°56'45", long 115°58'35", in sw1, sec.34, T.5 S., R.4 E., at dam on Snake River, 1 mile elownstream from Bruneáu River and
miles southeast of Granel View. Records available, March 1952 to September 1961. Remote registering water-stage recorder in channel
leading to Grand View Irrigation District CanaL. Datum of gage is at mean sea level (levels by Idaho Power Co.).
",,eservoir is fornied by eerth-fill and rock-faced dam. Storage began in February 1952. Total capacity, 250,000 acre-ft at eleva-
tion 2,455 ft (top of spillway gates), of which about 50,000 acre-ft is controlled sto,rage. Water is used for power generation in
plan t 0 f Idaho Power Co. Elevations and area-elevation curve furnished by Idaho Power Co.
Oct.
Nov.
Dee.
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sent.
,
31, 1960........................................30............................................. .31............................................. .31;1961.... .................................'28......... ...................................31............................................. .30..............................................31..;...........................................30..............................................31............................................. .31............................................. .
30.............. .... ..........................
October 1960 to September 1961
Elevat iøn ' _Contents(feet' ' (acre-feet)2,453.95 242,2002.453.16 236,5002,453.60 239,7002,454.21 244,200-2,454.28 244,7002,454.45 245,9002,453.73 240,6002,454.12 243,5002,453.97 242,4002,454.54 246,6002,454.65 247.4002 454.59 246 900
Month-end elevations and total contents at 12 p.m.,
Date
13-1725. Snake River near Murphy, Idaho
Location.--Lat 43°17'30", long 116°25'12", in SE1, sec.35, T.l S., R.l W.. on right bank '41, miles dowstream from Swan Falls power-
plant and 7% miles northeast of Murphy.
Drainage area.--41,900 sq mi, approximately.
Records availab1e.--August to October 1912, August 1913 to September 1961.
~.--Water-stage recorder. Datum of gag. is 2,271.17 ft abova, mean sea level, datum of 1929, supplementary adjustment of
1947 .
prior to Sept. 7, 1914, Itaf~ gag. and S.pt. 7. 1914, to Sapt. 30, 1935, wat.r.ltag. record.r, at lit. 3\ mil.' up.tr.am at dat\l
_ 9.,79 ft higher.
Extremes.--Maill discharge'during-year, 15.300 cfs Oct. 15 (gage height, 6.32 ft); minimum, 5,270 cfsApr. 18 (gage height, 3.15
:;,f~). min1mi. daily S 980 sf. July 20, . i
f+' 1912-6l: MaillI1 discharge, 47.300 cft June 22. 1918 (gage height, 13.95 ft, site and datum then in us..); minill recorCleel,,;3,900 cfs July 9, 1949 (gage height. 2.53 ft); minimu daily, 5,440 cfs Aug. 4, 1914. '
Remrks.--Records excellent. Flow regulated by many reservoirs upstream. Between this station snd ststion at King Hill, f1i; is
çregulated at,Swsn Falls powerplant snd C. J. Strike Reservoir (see above) and by gravity and pumping diversions. Diversions for
),i:rigation"of about 1,.630,(1('0 acressbove station.tt1o~' ~.._'\
%.,
¡;~\~,-'.
~
Discharge,' in cubic feet per ..cond. water Y"'''' OCtober 1960 to September 1961
Day
i.
'2 :
3
4
5
OCt. Nov.
8.970 9.3807.9 6 0 I," 9.2 30 ;'8.040 I, 9.4 6 0;
8.240" 9.4008.680 8.850
Dec. ,Jan.
8. 7 4 0 " 8.4 5 07.222.7.5 ,.7.5808.710
9.5208.4208.6508.3007.870, .
8.7408.0408.0708.7108.650
8.9109.0::0,9.060*8.6508,850
8,5408,770
~:i¡g8,100
8,0707.6608,8208,5908,5108,540
63.720
8,507
523.100
8,1908,1007.3508,510
8.1307.840, 8,3907.4908,910
8,1007.5208,0408,1007.520
6.9408.1308,0407.6408,100
7.7207.5507.4908,5907.640
8,1607.5508,1007.9307.9808,07046.270
7,944
488,500
Calendar y..r 1960. Ma 12,400
Water year 1960-61: Ma 10,300
* Discharge measurement mad. on this day.
Min 6,170Min 5,980
Feb.'ll7.8707.6407.840.a
8,1608,2208,1308.130*8,160
8,1308.1308,3608,5108.100
7.8108.3608.2408,2708,040
8.3008,2408,3008,3007.580
7.4007.9808,680
26.8708,102
450,000
Mean 8,343
Mean 7,609
Ma.
8,5108.5607.9008,a 207.230
7.7207.3207.5807.9806.940
7.0308.2406.910* 7.7.030
7.0307.8408,0108,3606.970
7.aOO7.5207.4607.6908.240
AnI'.
7.1407.0607.5207.6408,040
8.1008.1907.8707.6907.320~7.8707.0307.7.030
7.0:3 07.140*7.0607.6407.140
7.1107.1107.0807.) 8 07.080
MaY~6.910*6.8006.8006.850
6.770
6.6 SO6.5906.5106.540
6.5906.5906.5706.5906.910
6.6506.6 SO6.6506.6806.680
6.6806.5406.5406.4506.340
7.380 7.080, 6.~ 108.:330 ~140 6.3107.030 7.170 ~7.~ 80 7.380 6.3107.9~0 7.030 6.310
7.960 ---------- 6.:3 1037.0 ;¿ 0 : 0 4.34021.480
7,646 7,383 6,592
470,100 439,300 405,300
June6.3106~~6.3106.310
6.2606.2606.6506.9106.850
7.000* 6.5706.'7107&6.710
6.8806.'l 706.650*6.4 SO6.480
6.5106.5906.8006.5906.800
6.5106.4306.4 )06.4006.400
97.150
6,572
391.000
JuLY
6.3 'l06.3706.3106.2606.090
6.0106.0306.0306.0106.120
6.260
6.1 SO6.260
&.05106.030
&.0" 06.0106.0106.010*,~
6.0306.2606.1506.1506.090
6.2306.5707.0307.0306.4306.400¡"'''ovv
¡
6,219
382,400
Aw.
6.5906.5906.5 lQ.
6.5 06.820
6.7106.6806.6206.6206.590
6.6507.0607.2907.2907.030,
6.8006.7406.7706.8806.820
6.7706.7706.8006.8807.640
6.8507.0006.7406.7707.080*7.060
11.990
6,838
420,500
Sent.~7.2307.4907.5207.400
7.3 '107.2607.1707.3807.780
8.1907.5508.1007.6908.010
7.5208,0708,220à.070ip60
8,770*8.1007.8708.100e.040
80130800107.8107.7207.400
7.778
462,800
, "
,0
6 8.770
7," 9.850a 8.3909 7.66010 7.690
II 8,68012 8.9401.*10.20014 10.~0015 10.300
6.9408,5409.5509.3209.490
9.5508,5907.0g0
8.6 0,9.700
LS 9.170 9.4 9017 7.980 *9.61018 9.32 0 9.5 5 019 8,910 8.800?O 9.140 6,940
21 9.380 .,,'8.1 3022 9.140 9.670
23), 8.620 9. 7 ~ Q,'24 7.960 9.26025 9.2 6 0 8,1 90
. . d26 . ',;9.Ò:S 0 9.1 2027 9.0 6 0 8,1 0028 8.910 8.42029 9.260 9.67030 7.260 9.67031 õ1 ----------:68.08074.2108,845
543,900
Total
MeanAc-ft J
8,936
531,700I I
Ac-ft 6,056.000
Ac-ft 5,509,000
it .W'1P~ /1/,?-.
SNAKE RIVE MAIN STEM
13-1715. C. J. Strike a.'.rvoir n.ar Grand View, Idabo
Lat 42°56'45", long 115°58'35", in SW\ ..c.34¡T.5 S., .R.4 E., .t cl on Snake Riv.r, 1 ..ile dow.tr... fr01 Bruneau Riv.r .nd
7..il.. .outb...t of Grand View. R.cord. .v.ilab1., Marcb 1952 to S.ptem.r 1962. Ret. r.g18t.r1ng wat.r-.t.g. r.cord.r in
cbannd l..ding to Grand View Irrigation Di.trict Cand. Datum of gag. i. ae ..n .ea 1.vd (l.v.ls by Idabo Pow.r Co.).
R..ervoir i. formd by ..rtb-fill .nd rock-f.c.d cl. Storage b.gan in F.bruary 1952. Totd cap.dty, 250,000 .cr.-ft .t .1.va-
tion 2,455 ft (top of spillway g.t.s), of whicb about 50,000 acr.-ft i. controll.d storag.. W.t.r 18 u.ed fot power g.n.ration in
plant of Iclbo Pown Co. E1evationa and ar.a-.1.vation curv. fur..18b.d by Id.bo Pow.r Co. '
Oct.
Nov.
Dec.J.n.F.b.
Mar.
Apr.
May
JuneJuly
Aug.S.nt.
Montb-.nd e1.vation. .nd total co..t.nts at 12 n ....
Date
31, 1961................................;........30...............................................31......;........................................
31, 1962.........................................28...............................................31...............................................30...............................................31...............................................30...............................................31...............................................31...............................................30.. ... .. ..... . ... ....... ..
Octob.r 1961 to Bente..b.r 1962
E1.v.tion Cont.nt.
(f..t) (acre-fe.t)
2,454.49 246,2002,454.16 243,8002.454.42 245,7002,454.67 247,6002,454.16 243,8002,455.00 250,0002,454.96 249,7002,454.53 246,5002,454.10 243,3002,454.47 246,100
2,453.66 240,100
2 454.02 242 700
13-1725. Snake Riv.r near Murphy, Iclbo
Iecation.--Lat 43°17'30", long 116°25'12", in SEl; ..c.35, T.1 S., R.1 W., on right bank 4\ ..H.s downstr... from Sw.n Fall. power-
plant ...d 7% ..il.s northeast of Murpby.
Drainag. .rea.--41,900 sq mi, approximately.
Records avaHable.--August to Octob.r 1912. August 1913 to S.ptemer 1962.
Q!.--Water-.t.ge r.cord.r. Datum of gag. 18 2,271.17 ft above mean sea 1.ve1, datum of 1929, .upp1ementary adjustment of 1947.
Prior to S.pt. 7, 1914, staff gage and Sept. 7, 1914, to Sspt. 30, 1935, wat.r-stag. recorder, at dt. 3% ..Hes upstream at
d.tum 9.79 ft bigher.
Extremea.--Maill d18charge during ye.r, 21.700 cfa May 3 (g.ge beight. 8.23 ft); min1i, 6,230 cfa J.... 27 (gag. h.igbt, 3.31ft) ¡ ..in1im c1ily. 6.170 cf. Sept. 9.
1912-62:' Maimum d18cbarge, 47,300 eta Jun. 22, 1918 (gage beigbt, 13.95 ft, dte and datum tben in use); ..ini,.,, recorded,
3,900 cfs July 9, 1949 (gag. beight, 2.53 ft); minillm daHy, 5,440 cfs Aug. 4, 1914.
!!...R.cord. .xce11e..t. Flow regulated by many re.ervoirs up.tream. Between tb18 station and station at King Hill, flow 18
r.gulat.d at Swan Falls powerpla..t and C. J. Strike R.s.rvoir (..e abov.) and by gravity and pumping div.rdons. Diversion,S for
irrigation of about 2,140,000 acr.. (1960 d.termination) above atation.
Discbarge in cubic feet per aecond water year October 1961 to September 1962,,Dav Oct.Nov.Dec.Jan.Feb.Mar.Apr.Mav June July Auii.Sept.1 ~8.360 7.750 7.980 8.220 ~14.500 15.600 12.30C ~7.69 7.29027.520 8.560 7.490 7.960 ,,3.90 9.970 14.300 19.400 10.400 7.14 8.10e 6.88038.450 8.590 7.610 7.660 7.380 9.550 14.300 19.300 11.800 7.11~7.66(6.77047.900 8.540 7.580 7.810 7.520 9.610 13.200 16.000 13.600 7.11C 7.72(*7.98057.870 8.540 8.300 7.870 8.040 9.610 13.900 19.100 in 7.110 7.78(9.550
6 8.040 8.560 8.100 7.750 *3.070 9.580 14.000 15.000 11.900 7.060 7.90 8.77078.190 8.540 8.040 7.840 8.070 9.140 13.700 12.300 *9.970 6.910 m 7.29087.400 8.590 7.840 7.750 8.040 i0.9OO 14.100 12.400 9.290 6.97C 7.14097.780 8.540 7.780 7.660 8.160 9.140 12.200 11.500 8.650 6.910 8.19 6.710108.560 8.540 7.960 8.450 9.200 11.200 12.300 13.100 8.590 7.060 7:7.460
11 8.480 8.510 8.010 8.240 14.000 11.000 11.900 8.970 7.460 7.030 1.38C 8.160128.390 8.390 7,720 7.980 ~10.700 12.400 12.400 9.200 7.000 7.580 8.970138.650 8.240 7.400 7.380 15.300 10.200 *11.900 11. 700 8.510 6.970 7.40C 9.140148.880 8.220 7.720 7.750 14.800 9.760 11. 700 10.600 8.160 6.940 7.93C 9.060158.540 8.270 7.780 7.960 11.400 9.910 11.600 11.500 8.130 6.850 8.04C 8.390
16 8.540 8.420 7.980 ~9.820 10.500 11.800 12. 700 8.270 ~7.69 7.290178.360 8.360 7.840 7.380 10.400 9.730 12.200 11.400 8.510 6.740 7.84 8.770188.300 8.330 7.550 7.400 8.010 10.500 12.000 9.000 9.490 7.580 7.58 8.820198.390 8.220 7.870 7.640 9.550 10.100 11.300 10.300 10.200 7.060 7.20 8.620208.480 8.240 3.360 7.720 7.720 10.300 10.200 ~10.200 7.030 7.61 8.590
21 8.330 8.270 ß.7.290 7.610 11.000 10.700 9.170 10.200 7.000 7.20C 8.620228.590 8.240 7.960 8.190 7.290 12.100 9.060 9.820 8.850 7.000 7.69a 8.510238.540 8.540 7.400 7.720 7.780 11.600 9.760 10.200 9.460 6.970 7.720 8.740248.540 8.300 8.190 8.200 8.160 13.000 *11.000 9.580 9.120 *6.970 7.580 9.670258.770 8.240 7.930 7.600 8.560 13.400 9.430 12.200 8.970 7.030 8.070 9.350
26 .9 8.270 8.100 7.350 9.400 12.400 9.230 13.600 8.910 7.290 7.580 9.200278.850 * 8.360 8.010 7.060 9.550 13.100 9.120 11. 700 8.330 7.080 7.900 8.940289,000 8.590 7.660 7.030 8.910 15.800 8.850 14.800 8.240 6.910 8.450 9.350297.660 8.330 *~7.080 -là 10.800 15.400 8.540 6.940 8.560 9.380308.560 8.040 7.810 7.380 ----------15.300 12.000 14.800 8.300 7.200 8.480 9.670318.390 ----------7.840 7.980 ----------12.300 -----...._--12.100 ---------7.580 8.360 ----...._....-
Total 258.390 251.740 243.490 239.620 265.350 345.540 353.450 393.390 286.750 218.930 242.450 253.080Mean8,335 8.391 7,855 7,730 9,477 11,150 11,780 12,690 9,558 7,062 7,821 8,436Ac-ft 512,.50 499,300 483,000 475,300 526,300 685,400 701,100 780,300 568,800 434,200 480,900 502,000
Calendar year 1961: Max 9,060
Water year 1961-62: Max 19,400
Min 5,980Min 6,710 Mean 7,465Mean 9,184 Ac-ft 5,405,000
Ac-ft 6,649,000
* D18charg. m.asur_nt made on th18 day.
J, .J
'1I~~/1b3 .
SNKE RIV MAIN STEM
13-171S. C. J. Strik.' Re..rvoir near Grand View, Id.ho
",t.t'42.S6'4S".'10na llS.S8'35".j'1..SW~ ..c.34,T.5 S., R.4 I., at ci on Snak.Ri".r"l.,U. dow.tr.am from Brunea Ri".r.
7 .,Ue. '.outhea.t 'of Grand'Vi_, and"492.0 .,il.. up.tr.. fro., IIth of Snake River. Record.availabl., Karch 1952 ,to Setemar1963. Ret. reai.tarina water-.tai. r.cord.r. DatUI of iai. 1& at ..n .ea 1.vel (l.v.la by Idaho Pow.r Co.).
....rvoir 1& fo..d by earth-fill and rock-fac.d ci. Storaie b.gan in F.bruary 1952. Total capacity. 250,000 .cre-ft a,t el.-
vat10n2.45S ft (top of .pillway iat..). of which about 50.000 acre-ft i. controlled stor.... Wat..1& ua.d for power ieneration
1n plant of Idaho Power Co. 11evatiolU and ar.a-el.vation curve furn1&hed by Idaho Power Co. Fiiure. given herein repre.ent totalcontenta.
Apr.
Kay '31
Jun 30
July 31
Aug. 31S. t .30
'",
13-1725. Snake River near Murphy, Idaho
Locatton..-Lat 43.17'30". 10na 116"25'12". in SEl ..c.3S, T.l S., R.l W., on right bank 4~ .,ile. dow.tream fro., Swan Fall. power-
plant. 7\ .,ile. northea.t of Murphy, and 453.5 .,ile. up.tream from iiuth.
Drainage area..-41.900 .q mi. approximtely.
Record. availabl..--Au\lt to October 1912. Augu.t 1913 to September 1963.
li...Water-.tale recorder. Dat\l of iea. i. 2,271.17 ft abova mean .ea level, datum of 1929, .upp1ementary adju.t..nt of 1947.
Prior to Sept. 7. 1914. .taff iaie and Sept. 7, 1914, to Sept. 30, 1935, water-.tage recorder, at eite 3\ mil.. up.tream, at datum9.79fthilher.." ", ,
1i...l!x1i di.charg. during year. 28.00 cf. Jun. 23 (gag. height. 10.09 ft); minill, 6,340 cf. July 8 (gaae height. 3.38ft); min1i dai~~iit 59() cf.- l\ 26í rJlx='lh " ,
'., ~1§12.6JI 'Ma h.charge, 47,300 cf. Jun. 22. 1918 (gage height. 13.9Sft, ett. and datUI th.n in u..); ..1ni_ recorded,
3,900 cf...llily 9, 1949 ~gag. height, 2.53 ft); "inill daily, 5,440 cf. Aug. 4, 1914.
~...ø..corda excell.nt exc.pt::tho.. for p.riod. of no gage-height record, wh1ch are good. FløWr.gulatedby many r....voir.,:upatream. Batwean th1&stationand.tation at Kina Hill, flow 1& regulat.d at Swan ,Fall. powerplant and C. J. Strike ø....rvoir
'¡(.e. abov.) and by gravity and puiina diver.ion.. Diveraion. for irrigation of about 2,140,000 acre. (1960 determinatio",
above .tation.j;..
i,'-~?
H"10-;".'i,'D1achargav in cubic feet per .econd, water year October 1962 to, September 1963DeyOct¡ '-,'Nov. "Dec,Jan.Feb.I" Mar.Aor.Mav June July Au...Seot.r 9,490':9.730 9.790 '., 9.230 15.400 8.820 7.350 8.480 8.330 9.430 7.140 7.870.~~10.200"ll 9.260 ~17.400 8.130 7.260 8.620 8.360 9.320 7.200 7.93010.400.U.OOO 9.200 J. 9.120 17.400 7.550 7.230 8.800 11.900 8.390 7.400 8.220
.c~'
10.300~ ,7.930 10.100 ." 9.120 14.000 7.690 7.260 8.740 10.800 7.400 7.400 8.24010.6P9~6,770 .!9.120 14.600 8.650 7.900 8.450 10.700 7.550 7.750 8.190,
"6 9~496!9.380 9.970 J_', 9.1.40 11.900 9.400 7.610 8.220 12.600 7.030 7.980 8.190"~"~9.850 9.97Q 9.350 9.380 *9,460 7.870 7.810 15.400 6.820 7.720 8.190'8 9. 20.9.760 9.350 J, 9.260 8.850'~8.850 * 6.940 20.000 6.620 7.810 8.1609'9.910 10.800'.9;460 .:; 9.140 9.320 9. 00 8.220 7.140 20.600 7.400 7.520 8.220tÔ.*10.400,10.400 9.380:9.230 8.800 9.090 . 9.460 7.140 21.500,7.430 8.i.30 8.270,"'',,'. '""ii 9.940 10.400 9.140 '.9.650 8.100 8.540 9.910 7.140 22.700 6.680 7.720 8.0401210.000 8.880 á.910 a 8.850 9.260 9.940 10.800 7.900 23.200 6.910 6.940 8.160l310.300 9.120 9.820 a 8.5,50 9.230 9.260 10.200 9.910 23.600 6.740...~7.9801410.100 9.850 9.320 ,a 8.250 8.680 9.580 10.600 14.900 24.500 6.940 . 8.390 8.450159.940 10.600 9.520 a 8.650 8.540 ,8.560 9.940 .i 23.700 6.710 7.640 8.070
1'6'9.430 10.200 9.350 8.330 8.270 8.650 9.760 18.200 21.100 6.650 7.640 7.9601710.500 10.300 9.030 8.590 8.540 8.940 J.16.300 *22.700 ~7.610 8.6801810.500 9.230 9.140 8,940 8.010 8.620 10.400 *15.200 25.200 6.680 7.080 9.1701910.400 9.260 9.170 a 9.050 8.560 7.900 9.520 14.000 24.700 7.000 7;640 l~;~g2011.000 9.320 9.320 a 8.850 8.710 8.070 8.540 10.400 24.000 7.430 7.460
21 11.000 9.200 9.260 a 8.700 8.480 8.070 7.460 13.800 24.500 7.140 7.260 9.2302211.300 8.910 8.770 *a 8.350 8.510 8.160 8.560 9,430 .ß *7.110 6.940 9.5202311.400 8.940 8.740 8.850 8.450 8.100 7.520 8.070 26.900 7.260 7.350 8.9102411.200 9.230 9.000 8.590 8.420 7,400 7.690 7.000 25.400 7.230 7.380 9.6402511.000 9.520 9.520 8.390 1.7.380 8.940 8.160 22.500 7.080 8.190 9.170
26 10.900 9.320 9.060 ~7.980 7.960 8.770 .é 19.200 7.140 8.160 9.0902711. 700 9.170 9.290 8.160 8.040 7.550 8.070 7.660 18.900 6.910 7.930 9.4302811.000 * 9.970 8.800 8.300 8.800 7.870 7.980 8.040 17.500 6.650 7.060 9.4902910.600 9.290 8.740 8.190 -7.690 9.200 8.540 15.400 6.770 *7.980 9.5203010.600 9.490 8.590 9.140 ---------~8.540 9.120 14.900 7.870 7.660 9.2603110.600 ----------8.510 9,490 ----------7.350 ----------8.770 ---------7.400 7.660 ----------Total 322.820 290.920 28á.480 274.440 279.590 261.530 262.310 307.970 587.890 224.280 235.750 261.090Kean10,410 9,697 9,306 8,853 9,98S 8,436 8,744 9,935 19,600 7,235 7,605 8,700Âc-ft 640.300 577,000 S72,2oo 544,300 554,600 S18,700 520,300 610,800 1.166,000 444,900 467.600 S17,700Calendar year 19621 Max 19,400
Water year 1962.63t Max 27,100 Kin 6,710
Kin 6,590
Kean 9,591Kean 9,855 Ac-ft 6,944,000
Ac-ft 7,134,000
* Di.charge mea.ur...nt made on this day.
a No gege-height record.
~~rI4!l .
SNAKE RiVI! HAIN STE
13-171S. C. J. Strike Reservoir near Grsnd View, Idho
Lat 42'S6'4S", 101 llSoS8'3S", in SWl; s.c.34, T.S S., R.4 E., at da on Snake River, 1 iiile dostrea frOl Bruneau River, 7
iiilea southeast of Grand View, and 492.0,liiles upstrea frOl lIuth of Snake River. Records avsilab1e, March 19S2 to Septemer 1964.
Remte registering water-stage recorder. Datui of gage is at iiean sea level (levels by Idaho Power Co.).
Reservoir is formed by earth-fill and rock-faced da. Storage began in February 19S2. Total capacity, 2S0,000 acre-ft at ele-
vation 2,4SS ft (top of spillway getes), of which about SO,OOO acre-ft is controlled storage. Water is used for power generation
in plant of Idaho Power Co. Elevations and area-elevation curve furnished by Idao Power Co. Figures given herein represent totalcontents.
Date
Oct.31,1963
Nov.30
Dac.31Jan.31,1964
Feb.29
31
Date
Apr. 30, 1964
May 31
June 30
July 31
Aug. 31
Se t.30
13-172S. Snake River near Ilrphy, Idaho
12.--Lat 43°17'30", long LL6°2S'12", in SBl; sec.3S, T.1 S., R.1 W., on right bank 4l iiiles downstream frOl Swan Falls power-
plant, 7\ iiiles northeat of Ilrphy, and 4S3.S miles upstream trOl aith.Drainage area.--41,900 sq iii, approximtely.
Records availab1e.--August to October 1912, August 1913 to September 1964.
~.--Water-stage recorder. Datum of gage is 2,271.17 ft above iiean sea level, datui of 1929, supplemntary adjustment of 1947.
Prior to Sept. 7, 1914, staff gage and sept. 7, 1914, to Sept. 30, 1935, water-stage recorder, at site 3\ iiiles upstream at datui
9.79 ft higher.
Extrems.--Maii discharge during yea, 31,000 cfs June 25 (gag. heisht. 10.67 ft); iiini.., 6,400 cfs Oct. 4 (gage height, 3.41
ft) ;~iiinii daily. 6.740 cfs JU1i 19.112-64: Haf._ discharge,7,300 cfs June 22, 1918 (gage height, 13.9S ft, site and dstuii then in use); mini..11 recorded,
3,900 ds July 9', 1949 (sage'heiht-, 2.S3 ft); iiinii daily, S,440 cfs Aug. 4, 1914.
Reiiarks.--Records axcell.nt. Flow regulated by ainy reservirs upstre... Betwaen this station and station st King Hill, flow is
regulated at Swan Falls powerp1ant and C. J. Strike Reservoir (see above) and by gravity and puiing diversions. Diversions for
irrigation of about 2,140,000 acres (1960 determination) above station.
Discharge, in cubic feet per second water year October 1963 to September 1964,
Dav Oct.Nov.Dee.Jan.Feb.Mar.Apr.May June Julv Aue.SeDt.
1 9.380 9.730 9.970 9.490 9.170 7.960 lL600 17.600 9.350 .2 6.770 ~ 8.480
2 9.320 e.10.000 9.260 8.940 8.330 lL800 17.700 9.260 9.000 6.940 8.480
3 8,970 9.550 9.820 9.140 8.880 8.800 12.700 17.600 * 8.220 8.190 8.240 8,650
4 8.540 9.490 9.760 9.320 9.090 8.820 10.500 20.300 7.720 8.040 7.460 9.430
5 8.740 9.550 10.900 9.200 8,850 9.060 9.790 20.800 9.700 7.840 7.260 8.540
6 ~9.350 8.910 9.730 9.060 10.000 9.820 2L700 9.520 7.810 .6 8.450
7 8,330 9.140 9.550 9.320 8.390 9.120 9.640 ~10.600 7.550 7.230 8.240
8 8.510 9.380 10.500 9.380 ed 8.540 9.170 20.900 lL600 7.000 7.200 *8.330
9 8.450 9.380 10.100 9.090 8.770 8.300 ~2Ll00 12.600 7.640 7.690 8.450
10 8.540 9.290 9.520 8.850 9.350 9.060 * 8.650 18.900 14.300 7.110 7.200 8.300
11 *9.030 9.320 9.880 8.680 9.090 8.680 8.770 18.200 16.300 7.000 7.290 8.680
12 8.850 9.200 9.550 9.030 8.970 * 8.850 9.610 18,000 13.700 7.140 7.610 7.980
13 9.640 10.000 9.850 8.970 9.060 8.480 9.200 16.300 16.200 6.910 7.380 8.540
14 9.140 10.100 9.670 9.580 8.970 8.010 9.060 15.600 18.800 6.940 7.400 7.900
15 8.540 10.000 9.700 8.800 8.420 L..9.580 13.900 17.800 7.460 7.640 1&
16 9.000 9.910 a 9.820 8,800 8.390 8.970 9.000 16.300 19.000 7.110 7.380 8.240
17 9.230 9.820 aio.l00 9.140 8.480 9.200 9.350 14.700 20.100 7.380 7.580 8.240
18 8.910 10.300 a9.540 .e 8.800 9.030 9.460 16.300 24.700 6.850 7.580 8.130
19 9.060 10.100 a9.740 8.800 8.770 9.170 17.400 15.100 24.000 ~7.350 8.240
20 9.320 9.790 a9.530 9.550 9.290 9.850 18.600 14.300 26.800 6,820 7.400 8.420
21 8.590 9.670 a9.510 10.300 ~9.200 17.400 lL700 23.500 6.800 7.400 8.480
22 9.320 9.970 a9.830 lLl00 9.060 8.850 16. 700 lL200 28.900 *6.800 7.490 9.030
23 8.970 9.850 ll0.000 10.400 9.120 9.230 16.900 lL600 29.400 6.820 8.010 8.680
24 9.550 9.880 9.610 9.820 8,710 9.090 17.900 lL900 29.600 6.820 7.400 9.200
25 9.320 9.790 9.550 9.490 8.620 9.260 19.100 10.800 *~7.140 7.430 8.880
26 9.970 9.910 9.730 9.140 8.680 9.120 18.900 12.200 29.000 6.940 7.580 8.940
27 9.550 *9.970 9.790 8. 770 8.330 9.000 1.~20.800 6.770 7.320 9.060
28 9.580 9.610 9.200 8.970 9.200 9.120 *19.100 lL200 17.300 6.940 6.910 9.120
29 9.430 9.850 9.520 *9.170 9.230 9.200 18.300 9.640 lLOOO 7.610 7.640 8.880
30 8.850 10.100 9.820 9.430 ----.._----9.380 18.400 10.500 8,330 8.4éO 7.200 9.260
31 9.200 ----------9.640 9.290 ---..----_..19 ----------9.700 ---..-----7.960 7.490 .._--------
Total 80.160 a90.940 302.610 288.570 257.480 278.060 394.820 477.220 528.600 229.220 230.950 256.940
Mean 9,037 9,698 9,762 9,309 8,879 8,970 13,160 15,390 17,620 7,394 7,450 8,S6SAc-ft 5SS, 700 S77,lOO 600,200 S72,400 S10, 700 SSl,SOO 783,100 946,600 1,048,000 4S4, 700 4S8,100 S09, 600
Calendar year 1963' Max 27,100 Min 6, S90Water year 1963-64: Max 30,SOO Min 6,740 Mean 9,777
Mean 10,430 Ac-ft 7,078,000
Ac-ft 7,568,000
* Discharse measuremnt aide on this day.
a No gag.-height racord.
1Vit~/ql6 SNAKE RIVE MAIN STE 175
13-1715. C. J. Strike Reservoir near Grsnd View, Idaho
IAt 42'56'45", 10na 115'58'35", in SWli sec.34, T.5 S., R.4 I., at da on Snake River, 1 iiile cItr.. frOl Brneau Rinr, 7miles southeast of Grand View, and 492.0 iiil.s upstream frOl iiuth of Snak. Rivu. R.coda avail.b1e, Karch 1952 to s.pt.mu 1965.Reite regist.rina watu-stage recorder. Datui of gag", is at men sea level (levla b7 Idao Powr Co.).
Reservir is formd by earth-fill and rock-faced da. Storag'" began in Febrry 1952. Total capacity, 250,000 acn-ft at .Ina-tion 2,455 ft (top of spillwey gates), of which abot 50,00 acr..ft is controlled storage. Water is used for poer g..ustion inplant of Idaho Powar Co. llevstions and area-elevatio cue furnished by Idaho Powr Co. Fi¡es given herein repres.nt total co..tents.
Month-d e1evst
11evation(feet)2,454.02,454.02,454.0
2,454.0
2,454.1
2 454.0
Date
Oct. 31, 1964
Nov. 30
Dec. 31
Jan. 31, 1965
Feb. 28
r 31
Apr. 30, 1965
Kay 31
June 30
July 31
Aug. 31
Se t.30
13-1725. &nake River __ !lrphy, Idaho
~.--lAt 43'17'30", 10na 116'25'12", in SI\ sec.35, T.1 S., R:1 W., on right bank 4l miles dotr.. frOl Swn Falls pow-
plant, 7% miles northes.t of !lrphy, and 453.5 mile. up.tr.. frOl IIth.Drainaie area.--41,900 .e¡ mi, approximtely.Record. availab1e.--Augu.t to October 1912, Augu.t 1913 to Septemu 1965.
§!.--Water-.tage recordu (digital). Datui of gage is 2,271.17 ft above men .ee level, datu of 1929, supp1_ntery adju.tmnt of
1947. Prior to Sept. 7, 1914, .taff gage and Sept. 7, 1914, to Sept. 30, 1935, watu-.tag. recorder, at site 3l mi1ea up.tre. atdatuii 9.79 ft highu.
J!tr""..--Melli dischan. clurin year. 38,309 cf. De. 24 (gase heig. 12.30 ft, fr floodmk)'; mini_, 6,340 cf. Aug. 4 (gageheight, 3.38 ft) i min1i claily! 6,590 cf. July 18.,1912-65: Kaiiii di.charge, 47,300 d. Jue 22, 1918 (gage heigt, 13.95 ft, sit. anc datum t1i in uee); mint. r.corcled,
3,900 cf. July 9, 1949 (gage height, 2.53 ft); minii claily, 5,44 cf. Aug. 4, 1914.
~.--Recorcl. excellent except tho.e for period of no gage-height recorcl, which are goocl. now rag1atecl b7 -DY r..ervira up-
.tream. Between this .tation ancl .tation at Kina Bill, flow i. ngu1atecl at Swn Fall. power1ant' ancl C. J. Strike Re.ervir (.e.aboe) and by aravity and puming diversions. Diversions for irrigation of abot 2,140,00 acna (1960 c!termnation) abo atatio.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1964 TO SEPTEMBER 1965
DAY OCT.NOV,DEC.JAN.FEB.MAR.APR.MAY JUNE JULY AUG,SEPT,
1 ~11,100 11,200 11 ,700 20,400 210000 2i 22.500 11.000 10,10b 7,90 8,220
2 11,200 11 ,800 11.200 19,800 23.300 10,000 22.200 10.900 10,200 7,75 9.050
3 8,900 ll 11 ,900 12.400 18,700 22,800 9,190 23,400 12,200 11,200 8,01 110960
4 9,470 12,400 12,100 ll 16,500 *~11 ,200 ~~9.860 8,22 9,530
5 9,620 11,700 11 ,800 11 ,100 18,100 22,500 10,200 23,700 13,400 13,300 8,45 8,270
6 .9,530 11,900 11 ,000 11 ,900 17,600 21,800 11 ,500 20,000 12,200 15,200 8,270 ,
7 9,140 all,900 11 ,300 12,000 18,80Q 22,700 11,800 21,500 10,900 10,600 9,020 80510
,8 9,260 aii,500 11 .200 '12.000 18,800 22,900 12,900 21,100 11,600 9,680 8,900 *9,350
9 9.110 aii,500 10.200 11.700 18,900 22,400 14,100 23,000 11 ,100 9,560 8,330 8,960
10 9,080 a11,800 10,900 11,400 19.200 22.000 13,900 210300 10,900 8,960 8,420 9,200
11 9.290 all,300 11,300 11.100 19,200 21,500 15,100 23,100 10,600 70670 7,780 9,080
12 9,590 all,700 11 ,000 12.000 18,100 22,600 17,700 20,100 10,500 7,670 7,980 9,440
13 9,560 al1,400 11 ,000 12,100 18,200 21,800 210900 15,200 11,200 8,930 8,450 8,720
14 10.300 *a11.500 10.800 11 .500 18,400 22.600 21,500 16,400 11,600 8,070 8,990 9,230
15 10,000 11.300 2i 11.400 18.600 19.900 *i.15,600 11,800 7,750 8,870 8,690
16 9.860 11,200 9,770 12.300 17.900 20.200 20,700 11.300 12.100 7,350 8,450 8,780
17 9.770 11.200 10.500 12,800 17.900 21.500 21,900 13.700 12.200 7.610 8,81C 9,470
18 9.680 10,700 10.100 11 ,500 17.700 20,400 21.800 * 12,000 11,900 ii 8,480 9,560
19 9,800 12.'100 10,600 11,300 18.000 19,700 20,700 11,500 11,700 6.650 9,650 10,400
20 9,860 11.500 10,300 11.700 18.400 14.800 20.500 ~10,800 7.260 7,260 ,
21 9,920 11,700 11 ,500 13.000 20,400 12.700 20,900 9,950 10,600 7,380 ~iO,40
22 10,000 11.500 11.200 12,900 18.200 13,600 21,100 9,890 10,800 *7,170 9,650 1i.oo
23 10,500 11,500 825.500 14,000 20.200 14.500 21.000 11 ,900 9,500 8,420 9,410 10,40
24 10,600 11.900 a35.000 15,900 20.100 14.500 21,100 11 .600 9,680 7,520 9,680 10,30
25 10,400 11,900 a31.200 15.500 21.600 14.700 21,600 12.500 i.7,430 9,590 10,20
26 10.700 12,400 *&19,000 *14.900 22.800 13.800 22,100 12,000 9,410 7,960 9,560 9,77
27 11,100 10.400 16.200 14.300 23.200 12.500 22.500 11 .500 10,000 7,260 9,350 10,10
28 11.000 12,100 16.800 16.500 22.000 11,600 22,500 11,600 * 11,200 8,040 9,140 9.98
29 10.900 11,400 14.400 21,900 --10.800 210900 11,300 11 .300 7,720 80540 9.59
30 g:~gg 11.800 14.000 ~~:~gg
-----11.700 23.000 10.500 10,300 7.870 ~9,77
31 -----10.900 -----9.100 ------9.710 ----7.840 9,110 -
TOTAL 307,490 348,000 4230910 415.600 537.700 569.700 536.440 493.800 335,240 268'8~~269,85~2U,22
ME;AN 9,Y19 11.600 13.670 13.410 19.200 18.380 17.880 15.930 11,170 8.67 8,705 9,44
AC-FT 609,900 690.200 840,800 824.300 l,067M 1.130M 1.064M 979,400 664,900 533,200 535,200 561080
!l
CALENDAR YEAR 1964
WATER YEAR 1964-65
AC-i'T 7,976HAC-FT 9,501HMAX 35.000MAX 35.000 MIN 6,740MIN 6,590 MEAN 10,990MEAN 13.120
* D1acharg. mea.ur_nt _de on this clay.
a No aage-height record.
H J!res..cI in thou.anda.
id
o
o
oo
o
o
o
o
o
o
4i
o
~~/q..SNAKE RIVR HUN ST
13-1715. C. J. Strike Reservoir near Grand View, Idaho
Lat 42'56'45", long 115'58'35", in SWI: lec.34, T.5 S., R.4 E. on left bank, at du on, Snake River, 1 mila dowstream from BrneauIliver, 7 miles southeast of Grand View, and at mile 492.0. Records available, llrch 1952 to Septemer 1966. Rete registering water-
stage ncorder. Detum of gage is at mean sea level (levele by Idaho Power Co.).
Il..erir is for..d by earth-fill and rock-f.ced du. Storage b.gan in February 1952. Total capacity, 250,OOOacre-ft at eleva-
tion 2,455 ft (top of spillway gates), of which abot 50,000 acre-ft is controlled storage. Water is us.d for po.r generation in plantof Ida Pow.r Co. in.vations and area-el.vation curve furnish.d by Idaho Power Co. Figures giv.n herein represent total contents.
Month-.d elevat 0 8 and c ntents at 2400 OCtober 965 to Se tember 1966ElevationContentsElevationContentsDau(feet)(acre-feet)Date (feet (4(,re- feetOCt.31, 1965 2,454.23 244,300 Apr.30, 1966 2,454.52 246,400Nov.30 2,451.42 224,200 lly 31 2,454.84 248,800Dac.31 2,454.76 248,200 June 30 2,454.62 247,200Jan.31,1966 2,454.70 247,800 July 31 2,454.56 246,700Feb.28 2,454.30 244,800 Aug. 31 2,454.48 246,100lir.1 2 454 5 2464 e 30 2 9 24 400
13-1725. Snake Iliv.r near Imrphy, Idaho
Leation.--Lat 43'17'30", long 116'25'12", in SEl sec.35, T.1 S., 1l.1 W., On right bank 41: mile. dowstream from Swan Falls powerplant,
7% miles northeast of Murphy, and at l8ile453.5.
Dralnage ana.--41,900 S'l mi, approxl.tely.
Records availab1e.--August to OCtob.r 1912, August 1913 to September 1966.
5l.--D1gital water-stage recorder. Datum of gage is 2,271.17 ft above mean see level, datum of 1929, supplemntary adjustment of
1947. Prior to Sept. 7, 1914, staff gage and Sept. 7, 1914, to Sept. 30, 1935, graphic water-stage recorder, at site 3I miles
upstream åt datum 9.79 ft higher. OCt. i, 1935, to lir. 15, 1965, graphic water-stage recorder at present site and datum.J!trema'--MaiPlm dischrge duing y..r. 20.000 ofs Jan. 7; (gage height, 7.87 ft); min1i, 5,490 cfs June 7 (gage height, 3.13 ft);
minimm daily. 6.210 cfs May 12..1912-66: 1l1i discharge, 47,300 cfs June 22, 1918 (gage height, 13.95 ft, site and datum then in use); mini1l recorded,
3,900 cfs J..iy 9, 1949 (gage height, 2.53 ft); mini1l daily, 5,440 cfs Aug. 4, 1914.
Ilemrk..--Ilecords excellent. Flow regulated by many nservoirs upstream. Between this station and station at King Hill, fl"" isresulated at Swan Falls powerplant and C. J. Strike Ileservoir (see above) and by gravity and puming diversions. Diversions for
irrigation of about 2,140,000 acres (1960 determination) above station.
DAY OCT.NOV.DEC.JAN.FEB.MAR.APR.MAY JUNE JUi.y AUG.:iEPT.
1 9,740 LZ,400 1Z,700 15,500 15,400 14,500 8,6Z0 7,390 ~6,430 7,379 7,810Z9,890 LZ,600 T5 15,400 15,400 14,600 8,650 7,Z60 6, ZO 6,460 7.900 8'01039,980 LZ .600 13,300 15.400 14.700 14.800 8.330 7.370 6.Z80 6.530 7,590 8.540410.100 13.Z00 14.000 15,300 14.600 a.800 10.800 7,ZOO 6,750 6,5Z0 7,460 8,07059.830 LZ.700 13.900 B,400 14.100 15,600 11.000 7.150 6,340 6,530 7.Z30 8.010
6 10.500 12,200 131 700 15.400 13.300 15.700 11 .200 6.720 7,060 6,550 hi 8.63079.770 13.000 16,600 17,300 ii 14.100 10,600 6,610 6,530 6.550 7.750 8,630810.000 12.Z00 19,ZOO 17,200 15.600 14,900 10.600 6.350 6.690 6.450 7.690 8.51099,770 13'300 ir 17,300 14.400 15.400 10.000 6.Z50 7.080 6.390 7.320 7,75010~13.100 19.000 15,600 15.600 13.600 7.600 6.Z60 7.060 6.390 7.140 7.Z00
11 10.100 LZ.500 18.300 16.100 15.400 10.700 6,920 6.230 7.040 6,370 7.060 8.160LZ10.500 120300 18,ZOO 16.600 15.300 10.100 10.Z00 6.Z10 7.060 6;6.970 8.5701310.000 13.900 18.000 16.500 14.500 10.Z00 9.850 77 7.160 6.4Z0 ~7.6601411.000 13.100 170400 170300 14.900 9.980 8.750 6.710 7.410 6.370 6.970 7.8401510.100 131100 17.Z00 17.700 15.500 11 .500 8.630 6.580 6.980 6.400 6.970 8.690.
16 11 .000 LZ.500 17.700 ~15.500 10.Z00 6.930 6.560 6.970 7.230 7.260 8.7201711.700 LZ .400 17.900 17.300 15.500 10.300 6.900 6.550 7.050 7.070 7.350 8.9901812.500 13.900 170500 18.Z00 15.500 10.300 6.730 6.520 7.370 6.780 7,490 9.Z901911.900 13.700 18.Z00 17,ZOO 15.500 10.100 6.6Z0 6.5Z0 7.000 6.590 7.350 8.240ZO11 .900 13.600 18.100 17.Z00 15.500 14.000 67 6.590 6.450 6.560 7.3Z0 8.930
Zl lZ .ZOO 13.500 17.000 16.800 15.500 131 700 7.5-50 6.680 6.450 6.500 7.290 8.7502211 .800 13.900 18.000 15.800 15.600 12.900 9.540 6.580 6.430 6.560 7.110 8.870Z3LZ.700 11.800 18. ZOO ~15.500 LZ .900 8.910 6.570 6.470 6.590 7.060 8,630Z4LZ .000 12.900 170800 16.100 15.500 11 .800 7.710 6.370 6.540 6.640 7.170 8.660Z513.000 ~16.Z00 17.100 15.600 11 .100 7.550 6.300 6.4ÖO 7.140 7.550 8.630
Z6 LZ .900 14.500 17.900 15.900 15.700 10.000 7.470 6.Z80 6.470 &.870 7.4&0 8.&00Z7LZ .500 11.800 1& .400 15,500 ï4 10.100 6.900 &.250 6.440 7.430 7.430 8.540Z8LZ .600 11.700 16.800 15.500 14.400 8.140 701Z0 6.Z70 6.490 .l 7.5Z0 8.48029LZ .30e 13.Z00 16.900 15.900 ------7.800 7.550 6.300 6.470 6.950 7.640 8.54030LZ .600 ~16.300 15.400 ------8.510 7.4Z0 6.300 6.4Z0 6.990 7.900 8.&9031".700 ------, 5 .600 15.400 ------8.540 --.._--6.Z90 ------7.350 7.640 ------
TOTAL 347.0Z0 387.900 5Z0 .400 506,ZOO 4ZZ.300 371.870 Z53.380 Z04.940 ZOl.930 Z07.740 2Z9.000 Z52.640MEAN11.190 LZ.930 16.790 16.330 15.0aO 12.000 8.446 6.611 &.731 6.701 7.387 ;i.4Z1AC-FT &88.300 769.400 1.03ZM 1.004M 837.600 737.600 50Z.600 406.500 400.500 41Z .000 454.Z00 501.100
DISCHARGE. IN CUBIC FEET PER S~tUND. WATER YEAR OCTOBER 1965 TO SEPTEMBER 1966
CALENDAR YEAR 1965
WATER YEAR 1965-66 MAX 35.000MAX 19.Z00 MIN 6.590MIN 6.Z10 MEAN 13.600
MEAN 10.700 AC-FT
AC-FT
9.850M
7.746M
II ~pre..ed in thousands
.1. .1Y~~l1b7
SNKE RIVER MAIN STE
13-1715. C. J. Strike Reservoir oear Graod View. Idaho
Lat 42'56'45", lao¡ 115'58'35", io SW\ sec.34, T.5 S., R.4 E., 00 left baok, at dam 00 Soake River, 1 mile dowostream from Rruoeau
River, 7 miles southeast of Graod View, aod at mile 492.0. Recordi available, March 1952 to Septemer 1967 (discootioued).. llmote
registerio¡ water-stage recorder. Datum of gage is at meao sea level (levels by Idaho Power Co.).
Reservoir is formed by earth-fill aod rock-faced dam. Storage begao io February 1952. Total capacity, 250,000 acre-ft at elevatioo
2,455 ft (top of spillway gatei), of which about 50,000 acre-ft is cootrolled storage. Water is used for poar geoeration 10 plant of
Idaho Power Co. Elevations aod area-elevation curve furoished by Idaho Power Co. Figur..s giveo herein represeot total cooteoti.
Month-end elevations and contents at 2400 OCtober 1966 to Se tember 1967
Date Elevatioo Contents Date Elevatioo Contents
(feet)(acre-feet)(feet)(acre-feet)
October 1966 2,454.30 244,800 April 1967 2,454.50 246,300
Novemer 2,454.21 244,200 May 2,454.58 246,900
Decemer 2,454.00 242,600 June 2,454.75 248,200
Jaouary 1967 2,454.10 243,300 July 2,454.57 246,800
February 2,454.17 243,900 August 2,454.40 245,500
March 2 44 245 500 Se tember 2 454 80 248 500
13-1725. Soake River near Ilrphy, Idaho
Ipcatioo.--Lat 43'17'30", loi 116'25'12", io sE\ sec.35, T.l S., R.l W., 00 right baok 4\ miles dowoatrea from Swao Faiil powerplaot,
7\ milea oortheast of Ilrphy, and at mile 453.5.
Draioage area.--41,900 sq mi, approximately.
Records available. --August to October 1912, August 1913 to September 1967.
Q!.--Digital water-stage recorder. Datum of gage is 2,271.17 ft above meao sea level, datum of 1929, iupplemeotary adjustinot of
1947. Prior to Sept. 7, 1914, staff gage aod Sept. 7, 1914, to Sept. 30, 1935, graphic water-stage recorder at site 3\ miles up-
itrea at datum 9.79 ft higher. Oct. i, 1935, to lIor. is, 1965, graphic water-stage recorder, at preseot aite aod datum.
Extremes.--Maximum dischar e durin ear 24 000 cfi Juoe 20 a e hel ht 8.87 ft . mloiii, 5,430 cfs Feb. 20 (gage haight, 3.15 ft);
minimm a y, t c s Apr. .i§iz-61: Max mu discharge, 4~l300 cía June 22, 1918 (gage height, 13.95 ft, site and datum then in use); minimm recorded,
3,900 cfi July 9, 1949 (gage height, 2.53 ft); mioiii daily, 5,440 cfs Aug. 4, 1914.
~.--Record8 excellent. Flow regulated by many reservoirs upstream. Between this station and station at King Hill, flow 1s regu"
lated at Swao Falla powerplaot aod C. J. Strike Reiervoir (iee above) aod by gravity aod pumping diveraioos. Divaroiooi for irriga-
tion of about 2,140,000 acrei (1960 determioatioo) above itatioo.
DAY OCT,NOV.DEC.JAN.FEB.MAR.APR.MAY JUNE JULY AUG. ~SEPT.
1 9,080 8,6BO 9,090 7,900 9,060 B,900 7,330 7,520 8,550 15,900 7,130 7,780
2 9,020 9,240 9,210 7,900 9,150 8,220 7,260 8,340 8,610 14,100 7,310 7,270
3 9,050 9,200 9,070 7,600 8,610 9,460 7,860 8,430 8,600 11,300 7,160 7,270
4 9,650 9,170 9,000 8,400 7,930 7,100 9,020 8,000 8,580 10,100 6,920 7,710
5 9,050 9,210 9,030 8,400 8,480 8,150 8,420 7,120 8,860 9,960 6,960 7,780
6 9,620 9,290 8,670 8,400 8,580 7,920 8,380 6,710 9,830 9,760 7,220 7,430
7 8,840 8,970 8,500 8,100 8,230 8,190 8,220 6,970 10,800 9,000 60930 7,650
8 9,170 9,130 8,660 8,100 7,740 6,930 7,880 6,790 11,100 8,760 7,120 8,210
9 9,250 8,910 8,960 8,100 7,980 7,740 7,430 7,920 11,400 8,970 7,200 8,510
10 8,710 8,600 9,020 8,500 7,480 7,890 9,080 7,480 11,900 9,840 7,270 8,630
11 8,740 9,220 8,740 8,200 8,090 8,120 8,490 6,850 11,700 9,790 7,620 B,190
12 8,970 9,170 8,5;40 7,780 7,740 7,9,50 6,600 7,930 11,700 9,900 7,810 8,250
13 9,090 9,340 8,660 B,080 7,560 8,080 8,050 7,340 llt200 8,060 7,140 8,180
14 9,200 9,140 8,660 8,110 8,100 8.680 7,420 7,970 11,200 7,160 7,180 8,520
15 10,100 9,190 8,740 8,300 8,650 8,550 7,860 7,530 10,300 7,410 7,460 8,480
16 9,690 8,990 8,630 B,490 8,550 7,730 6,550 7,040 12,800 6,590 7,090 80600
17 9,570 8,910 8,530 B,910 7,450 6,790 6,500 7,370 11,100 6,590 7,690 8,880
18 9,630 8,930 8,590 8,590 7,840 7,400 7,320 7,360 11,300 6,560 8,150 8,730
19 9,600 8,770 8,720 8,610 7,390 8,120 7,020 7,390 16,200 6,580 6,730 8,670
20 9,550 9,000 8,730 8,410 7,710 7,720 7,510 7,360 23,000 6,550 7,120 7,870
21 9,360 8,920 8,410 8,280 7,820 8,050 7,400 7,260 22,300 6,720 6,750 8,270
22 9,630 á,860 80930 8,380 7,590 7,980 6,420 7,200 22,100 6,870 7,020 8,460
23 9,430 8,800 8,780 8,580 7,940 7,960 6,840 7,480 21,200 6,600 7,300 8,630
24 9,750 8,820 8,510 10,800 8,270 8,070 6,930 8,880 17,800 6,800 7,630 9,190
25 9,650 8,670 8,130 9,170 7,440 7,490 7,940 9,550 18,200 7,110 7,070 9,090
26 9,860 8,790 7,770 9,030 8,050 7,390 6,680 9,490 14,400 6,560 7,280 7,350
27 9,750 8,530 8,100 8,820 8,360 7,860 7,230 8,950 14,000 6,940 6,880 8,880
28 9,520 8,620 8,600 8,810 8,670 9,670 7,110 7,950 13,600 6,880 7,410 8,290
29 9,560 8,740 8,600 8,660 ----8,080 7,040 8,720 12,900 6,680 7,490 8,340
30 9,530 8,840 8,300 8,450 ----8,25Q 7,470 8,890 14,000 6,730 7,780 8,680
31 9,010 -----8,300 8,870 ---7,870 -----8,330 ------6,640 7,760 ---
TOTAL 290,630 268,650 268,180 262,730 226,460 248,310 225,260 242,120 399,230 257,410 225,580 247,790
MEAN 9,375 8,955 8,651 8,475 8,088 8,010 7,509 7,810 13,310 8,304 7,277 8,260
MAX 10,100 9,340 9,210 10,800 9,150 9,670 9,080 9,550 23,000 15,900 8,150 9,190
MIN 8,710 8,530 7,770 7,600 7,390 6,790 6,420 6,710 8,550 6,550 6,730 7,270
AC-FT 576,500 532,900 531,900 521,100 449,200 492,500 446,800 480,200 791,900 510,600 447,400 491,500
DISCHARGE, IN CFS, WATER YEAR OCT08ER 1966 TO SEPTEMBER 1967
CAL YR 1966: TOTAL 3,477,460
WAT YR 1967: TOTAL 3,162,350
MEAN 9,527
MEAN 8,664
MAX 18,500
MAX 23,000
MIN 6,210MIN 6,420
AC-FT 6,897,000
AC-FT 6.272,000
11V~~/1(Pg
ii
SNKE RIV MAIN STE
13-1725. Snake River near Murphy. Idaho
iecation.--i,t 43.17'30". 10,, 116.25'12". in sEI..c.35, T.l 5., R.l W.. on right bank 4\ mil.. down.tr.am from Swan Fall. powerplant,
7 mil.. iirthtia.t of Ilrphy. .nd at mil. 453.5.
Drdnase ..ea.--41,900 .'1 mi. approxilltely.
hcord! .vdiabl....Augu.t to Octob.. 1912. Augu.t 1913 to S.ptemer 1968.
i!.--llital water-stag. reco..dar, Datu of gage 18 2,271.17 ft abov. men .ea leval, datum of 1929. .uppl..ntary adju.t..nt of 1947.
hio.. to Sept. 7, 1914. .taff gage .nd Sept. 7, 1914. to S4t. 30. 1935, graphic water-.tag. record.r, at .ie. 3. milea upstream .t
cltum 9.79 ft high.r. Oct. i, 1935, to Mar. lS, 1965, gr.phic wat.r-.tage r.cord.r, at pre.ent dt. and datum.
1!.--iis. di.cha..g. duri.. y.... 20.400 d. Jun. 20 (g.g. height. 7.80 ft); miniim, 5.490 cf. Apr. 18 (gag. height, 3.20 ft);
iìnim daily. 6,04 d. May 13.1912-68: Maiim di.c ... 4730 cf. Jun. 22 1918 .. h.i ht 13.95 ft. ait. and datum then in u..); mini..m r.cord.d, 3,900
da July 9, 19 gage haig t..5 ft) i mins. daily. 5,44 cf. Aug. 4. 1914..
&ø.--hcorda exc.llent. Flow ragulatia by IIny re..rvoirs up.tream. Between this .tation and .t.tion at King Bill. flow ia ragu-
i.tia at Sw.n Falla powlant .nd C. J. Strike Re.ervoir .nc by gr.vity .nd puming dberaio...Div.raion. for irrig.tion of .bout
2.140.00 &cr.. (1960 clterintion) .bov. .t.tion.
OISCI'ARGE,IN CFS,WATER YEAR OCTOBER 1967 TO SEPTEMBER 1968
DAY OCT NUV DEC JAN FER MAR APR MAY JUN JUL AUG SEP
1 8,(,20 11,100 11,(,00 13,300 10.(,00 13,900 7,&50 &,610 7,430 6,520 7,010 8,950
7-9,600 11.300 11,700 12.&00 10,300 12,100 7,350 (,.370 7,200 &,530 7,3&0 7,990
3 8,970 11 ,200 12.500 12,700 10,(,00 10.500 7,580 6,340 6,790 6,940 7,340 7,270
4 10.200 11,400 11.800 12,bOO 10,700 10,&00 8,480 (,,780 &,670 7,000 7,270 8,990
5 10,200 11,700 11.800 12,700 11 ,000 12,300 8,460 &,470 6,640 6,620 7,060 9,020
&9,310 '11,900 12,300 12,500 14,300 12,800 7,900 &,530 7,250 (,,970 7,250 8,420
7 10,700 12,300 12,200 12,500 8,790 13,200 7,6&0 6,510 9,300 (,,700 7,230 8,5&0
8 10,900 11 ,500 11 ,600 12,100 10,(,00 12,100 7,8&0 6,450 8,960 6,&30 7,310 7,710
9 9,610 12,000 13,400 12,100 10,100 9,400 7,520 6,450 8,980 6,480 7,140 8,380
10 10,600 1 it 800 12,600 11 ,900 12,100 7,000 7,840 6,4&0 9,800 6,460 7,460 8,480
~
11 'J,300 11,800 12,200 12,300 12,100 7,160 8,090 6,420 10,400 6,480 6,940 8,490
12 10,100 11,900 12,700 14,300 12,200 7,360 7,780 6,440 8,840 6,500 7,420 8,430
13 10,900 11 ,600 13,200 12,000 12,200 7,020 7,340 6,040 9,010 6,520 7,350 8,410
14 9,370 12,200 12,(,00 ,12.200 12.000 7,520 (,,830 6,050 9,240 6,660 8,400 8,290
15 9,930 11,600 11,700 10,500 11 ,500 7,800 6,850 6,270 8,510 7,230 9,950 8,220
16 10,700 11,700 11,700 12,200 10,900 7,660 7,170 6,300 9,650 7,200 9,030 8,080
17 9,660 11 ,200 12,100 13,300 11 ,400 7,630 7,650 6,270 9,450 7,150 8,980 8,430
18 10,500 11.100 13,600 13,400 12,600 7,660 6,820 6,330 13,500 6,580 9,280 8,240
19 10,000 11,500 ,13,100 12,100 14,000 7,430 6,940 6,480 17,600 (,,620 10,100 8,400
20 10,000 11 ,400 12,800 11,700 11,700 7.570 7,100 6,970 111,500 6,720 11 ,400 8,340
21 10,200 11,500 13,300 10,400 13,400 7,580 6,990 &.590 13,100 6.540 11 ,900 9,140
22 10,400 11,600 13,200 10,800 14,400 7,560 6,910 6,570 10,000 6,550 11 ,900 9,600
23 10,400 11,400 13,200 11,000 15,800 7,380 6,890 6,620 8,860 6,540 11,900 9,260
24 10,500 11,700 13,200 10,700 14,500 7,27h 6,810 6,670 7,760 6,610 lit500 9,040
25 10,500 12,100 12,600 10,400 14,300 7,250 6,850 6,790 6,820 7,040 10,500 10,&00
2&10.1100 11,300 12,100 10,400 15.200 7,270 7,000 6,1110 &,710 6,830 9,600 9,7/,0
27 10,1100 10,600 12,900 10,900 15,100 7,370 6,950 6,780 6,620 7,170 10,100 8,950
211 10,700 10.900 13,400 11,100 14,700 7,400 6,910 6,640 6,610 6,850 9,840 9,360
29 10,600 10,900 13,300 11.400 14,800 7,550 6,940 6,580 /,,570 6,830 9,140 9,810
30 11.300 10,600 12,700 11.400 7,510 6,7/,0 6,590 6,500 6,960 9,090 9,670
31 11.200 13,200 11,000 7,250 6,880 6,750 9,050
TOTAL 31&,570 344,800 390,300 368,500 361,890 270,100 219,880 202,060 273,270 209,180 275,800 262,290
MEAN 10,210 11,490 12,590 11.890 12,480 8,713 7,329 6,518 9,109 6,748 8,897 8,743
MAX 11,300 12,300 13.600 14,300 15,800 13,900 8,480 &,970 18,500 7,230 11,900 10,600
MIN 8.620 10,600 11,600 10,400 8.790 7,000 6.760 6,040 6,500 /,,460 6,940 7,270
AC~FT (,27,900 (,83,900 774,100 730,900 717,800 535,700 436,100 400,1100 542,000 414,900 547,000 520,200
CAL YR 1967:TOTAL 3,386,560 MEAN 9.278 MAX 23,000 MIN 6,420 AC-FT (,,717,000
WTR YR 1968 :TOTAL 3,494,640 MEAN 9,548 MAX 18,500 MIN 6,040 AC-FT &,932,000
SNAK RIVER ~IN STEM
13-1725. Snake River near Murphy, Idaho
LOTION.--Lat 43°17'30", long 116°25'12", in SE. sec.35, T.l S., R.l W., Ada County, on right bank 4.2 miles
downstream from Swan Falls powerplant, 7.5 miles northeast of Murphy, and at mile 453.5.
DRAINAGE AR. -- 41,900 sq mi, approximately.
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
GAGE.--Water-stage recorder., Datum of gage is 2,271.17 ft above mean sea level. Prior to Sept. 7, 1914, non-
recording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 miles upstream at datum
9.79 ft ,higher.
AVERAGE DISCHARGE. --~6 years, lO, 730 cfs (?, 774,000 acre-ft per year) 1 15-year base period (1952-67), 10,070 cfs.
EXTRES.--Current year. Maximum discharge. 38,600 cfs Apr. 25 (gage height, l0.08 ft)i minimum, ~,710 cfs July
8, 131 minimum gage height, 3.39 ft July Ij minimum daily. 6 760 cfs Au 7.
. Period of record. Maximum discharge, 47,3 0 c s June 2, 1918 (gage height, 13.95 ft, site and datum then
in use) i minimum recorded, 3,900 cfs July 9, 1949 (gage height, 2.53 ft)i minimum daily, 5,440 cfs Aug. 4,1914.
REMARKS.--Records ~cellent. Flow regulated by American Falls Reservoir 260,5 miles upstream (see sta 13-0765).
Diurnal fluctuation caused by hydroelectric plants upstream. At times, practically entire flow is diverted
at Milner during irrigation seasons. Surface-water diversions and ground-water withdrawals for irrigation ofabout 2,140,000 acres (1960 determination) above station.
REVISIONS (WATER YEA) .--WSP 1737. 1933 (M).
Rating table (gage height, in feet, and discharge, in cubic feet per second)
3.5 6,6504.0 8,1006.0 14,300
8.0 20,800
9.5 26,500
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1968 TO SEPTEMBER 1969
DAY
1
2
3
It
5
6
7
8
9
10
It
12
13lit
15
9,1309,3109,1909,5309,1t00
16
17
18
19
20
21
2223
21t25
262728
29
30
31
TOTAL
MEAN
MAX
MIN
AC-FT
9,5109,9009,5809,3709,550
9,51t09,5609,8109,6209,650
10,20010,60011,00010,90011,900
12,00012,200
12,50012,000
11 ,800
11,20011,10011,600
11 ,60G11,80011,700
326,B10
10,51t012,5009,130
61t8,200
OCT
11,90012,30012,50013,20013,100
12,60012,60012,000
lit, 300
11,900
13,50011,70013,90012,80013,300
12,1t0012,60012.30011,20012.200
11,1t0010,90011,100
12,70C11,200
10,600
11,1t0011,500
11,1t0012.600
367,10012,24011t,300
10,600728,100
NOV
10,30011,500
11,70011,00012,900
12.1t0012,30012,1t00
11,30012,000
12,00011,800
13.1t0012,600
12,500
12,1t00
12,,50013,70013,90012,100
12,30012,300
12,1t0012,50012,200
13,90013,90013,70013,10012,90013,000
386,90012,48013,90010,300767,400
CAL YR 1968 : TOTAL 3,523,780
WTR YR 1969' TOTAL 1t,516,610
DEC
12,800
12,20013,700
li, 90015,600
13,50016,80012,50016,10015,000
14,20015,30018,1t0019,10020,100
19,1t0016,80017,90018,300
17,1t00
20,50024,30023,60019,60017,700
18,50020,60020,10018,40018,70017,700
539,70017,41024,30012,200l,070M
MEAN 9,628
MEAN 12,370
JAN
16,70016,30016,90017,60018,600
18,00015,80017,800
17,1t0015.100
11,30015,70016,10016,50016,600
17,20015,20016,70016,20016,100
16,20015,90016,90015,900
15,1t00
16,1t0016,600'
16,200
463,30016,55018,60015,100918,900
FEB
16,10015,20016,10016,100
16,000
15,50015,80016,20015.70015,800
15,30015,700
16,ItOO
15,1t00
15,4011
16,1t0015,70016,40016,10016,500
18,1t0017,90017,00016,800
19,1t00
20,30020,90022,30022.00019.00019,600
53L,400
17, litO,22,30015.2001,054M
MAX 18,500
MAX 26,000
MAR
23,60021t,50022,80022,000
20.1t00
15,80017,50015,10012,30015,100
13,900
li, 100
lit, 800
13,1t00IIt,700
12,900
11,000
9,61t09,92011,600
12,00013.50017,30023,80026,000
22,50019,70022,900
22,1t00
21t,1t00
519,56017,32026,000
9,61t0
1,031M
MIN 6,040
MIN 6,760
APR
23,600
18,BOO17,700
IB,ItOO19,500
17,1t0018,60017,300
IIt,ItOO11,100
13,50010,60013,00010,10011.100
11,1t0011,20010,8009,16010,700
10,70010,7009,5209,60l)9,710
9,3109.1t809,0509,0509.280
9,1t1t0
391t,20012,72023,6009,050781,900
MAY
9,1t209,0908,910
9,21t09,360
8,580B,7508,2708,5209,510
9,690
10,3009,9509,9309,510
9,0509,080
8,31t0
8,31t08,1t00
7,990
8,0008,070
8,,1t008,280
8,68010,700
9,1t009,6509,320
270,7309,021t10,7007,990537,000
AC-FT 6,989,000
AC-FT 8,959.000
JUN
9,310
8,91t0
8,21t07.3707,570
6,9006,8707,1308,2608,350
7,8806,8507,1406,8606.850
6.9207,1007,3806,9307,370
6,9106,9207,3707,3307,060
6,9306,9707,5807,6807,3607,910
230,21t0
7.1t279,3106,850
1t56,700
JUL
7.850.7,510'
7,1t507,1006,950
7,5207,9207,lt007,1707,570
7,2908,2807,7607,2606,900
6,8706.7607,1206.9107,110
7,2307,2007,4207,,1907,120
7,01t07,1307,0007,0507.3307,650
226,0607,2928,2806,760
1t1t8,,400
AUG SEP
7,9708,1t307,9207,8207,580
8,1107,9607,9608,1208,130
8,3008,5508,2607,8508,160
8,8108,1t908,7508,6708,690
8,9609.8209,980
10,1009,880
10,3009,7009,2108,9609,170
260,6108,68710,3007,580516,900
. AI £1- .. ¡.lf~/14/)184 (j . I'SNAKE RIVER MAIN STEM
13172500 Snake River near Murphy, Idaho
.
LOCATION.--Lat 43'17'30", long 116'25'12", in SE~ sec.35, T.1 S., R.1 W., Ada County, on right bank 4.2 miles
downstream from Swan Falls poerp1ant, 7.5 miles northeast of Murphy, and at mile 453.5.
DRAINAGE ARA.--41,900 sq mi, approximately.
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft abve mean sea level. Prior to Sept. 7, 1914, non-
recording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 miles upstream at datum9. 79 ft higher.
AVERAGE DISCHAGE.--57 years, 10,730 cfs (7,774,000 acre-ft per yearl; IS-year base period (1952-67), 10,070 cfs.
EXTRES.--Current year' MAXimu disçharge. 26.400 cfs May 24, (gage height, 9.88 ftl; minimum, 5,920 cts July 20
(gage height, 2.84 ttl. m~imum daily, 6,510 cts JU1~ 17.Period ot record. Max um dIscharge, 47,300 cfsune ~2, 1918 (gage height, 13.95 ft, site and datum then
in use); minimum recorded, 3,900 cfs July 9, 1949 (gage height, 2.53 ft); minimum daily, 5,4~0 cts Aug. 4,1914.
REKS.--Records excellent. Flow regulated by American Falls Reservoir 260.5 miles upstream (see sta 13076500).
Diurnal fluctuation caused by hydroelectric plants upstream. At times, practically entire flow is diverted
at Milner during irrigation seasons. Surface-water diversions and ground-water withdrawals for irrigation ofabout 2,140,000 acres (1960 determination) above station.
REVISIONS (WATER YERS) .--WSP 1737. 1933 (M) .
Rating table (gage height, in feet, and discharge, in cubic feet per secondl
(Shifting-control methd used Nov. 16 to Jan. 26, Apr. 17 to June 22, July 31 to Aug. 20)
3.0 5,2704.0 8,100
6.0 14,300
8.0 20,800
9.5 26,500
DAY
1
2
3
4
5
8,9508.9308,6109,1709,490
OCT
DISCHARGE, IN CU81C FEET PER SECOND, WATER YEAR OCTOBER 1969 TO SEPTEMBER 1970
JUN
9,86010,1009,24010,1009,B50
9,0509,7809,20010,1009,080
9,4309,99010,3008,9609.500
9,5709,6509,7509,7809,780
9,7509,7509,7409,5309,230
9,1909,4209,3009,3009,280
287,5609,585
10,3008,960570,400
NOV
9,190
9,78010,90010,60010,300
10,50010,1008,97010,00010,700
10,20010,1009,8709,7009,750
9,7809,7109,3509,3509,690
9,5109,7909,6809,4709,630
10,0009,7709,5909,6309,4809,150
304,2409,814
10,9008,970603,500
CAL YR 1969 TOTAL 4,331,530
WTR YR 1970 TOTAL 3,964,630
6
7
8
9
10
11
12
13
14
15
9,8909,9709,9809,7309,670
9,940
10,0009,6509,8409,030
16
17
18
19
20
21
22
23
24
25
9,5509,6209,8309,83010,100
9,79010,40010,80010,30010,200
26
2728
2'1
30
31
10,400,1,570
10,40010,40010,2009,690
TOTAL
MEAN
MAX
MIN
AC-FT
303,'1309,80410,8008,610
602,,800
DEC
9,9109,660
'1,6609,5909,980
11,10011,00010,700
10,400
11 ,600
10,80011,50012,00011,70012,900
13,80013,40013,50013,500
13,300
13,30013,50016.50016,00016,200
12,90014.00017,00015,90013,10011,400
389,80012,57017,0009,590
773,200
MEAN 11,870
MEAN 10,860
JAN
11 ,600
12,00012,700
11,700
11,000
11,60011,700
11,300
11 ,000
11 ,000
11,70014,40014,70014,70014,700
11,20014,40011,10011,10011,200
11,30010,80011,1009,99011,000
8,0607,4207,470
321,94011,50014,7007,420638,600
FEB
7,5207,3307,7608,0307,140
,1,9909,7309,420B,8209,400
9,8209,060
8,960
8,5208,520
8,7208,5308,7808,3607,200
7,0607,8408,2208,3007,110
7,4008,750B,2708,450B,6008,130
25'1,7408,379
9,9'107,060
515,200
MAX 26,000
MAX 24,600
MAR
7,0007,8107,000
7,0'10
8,100
8,0407,1408,7809,560
11,500
13,80013,20012,80012,50011,300
13,60019,30019,10017,50015,600
14,00014,00012,90010,800
'1,710
9,4709,4409,86013,00017,400
3'H030011,710
1'1,3007,000696,800
MIN 6,760MIN 6,510
APR
17,10014,80014,700
14,100
14,100
13,90012,70012,400
14,000
15,900
17,80021,60023,70017,70020,200
18,40017,80014,90016,20014,500
15,10015,70020,30023,40019,300
19,40022,00021,00022,300
19,40018,900
543,30017,53023,70012,400l,078M
MAY
17,60018,10017,20016,40017.700
12,2009,4108,3908,3608.100
10,00010.7009,680
10.200
18,100
21,30024,60024,40023,10020.800
18,40016,90016,30011,00010,900
8,1008,9608,1309,20012,400
426,63014,22024,6008,100846,200
AC-FT 8,592,000
AC-FT 7,864,000
13,10019,40021,200
20,00015,500
8,8709,3508,2508,5707,350
6,5106,5407,7206,7406,6,50
6,5706,5106,6506,6806,540
6,9706.6506,6806,7106,740
6,7706,9707,3506,9706,9707,140
274,6208,859
Zl,ZOO6,510
544.700
JUl
7,1407,1707,1107,3507,260
7,2607,5207,0907,0207,130
7,0807,4507,7407,5907,340
7.1807,0607,0407,0507,010
6,9707,0106,9706,9906,990
6,9607,0107.0407,0607,0307,140
221,7607,1547,7406,960439,900
AUG SEP
8,310
8,,2108,3608,0108,370
8.60010,1009,~nO9,230
9,ZOO
8,6109,3809,120
8,9409,220
9,9109,5009,4609,4309,370
9,7509,70010.3009.8109,880
10,1009,89010,0009,8809,860
279,8109,32710,3008,010555,000
i1t~~1' 7I (Í '" "'", LOCATION.--Lat 43°17'30", long 116°25'12", in
downstream from Swan Falls powerplant, 7.5
SNAKE RIVER MAIN STEM
Snake River near Murphy, Idaho
DRAINAGE ARA. --41, 900 sq mi, approximately.
SE~ sec.35, T.l S., R.l W., Ada County, on right bank 4.2 miles
miles northeast of Murphy, and at mile 453.5.
PERIOD OF RECORD. --August to October 1912, AUgust 1913 to current year.
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft above mean sea level. Prior to Sept. 7, 1914, non-
recording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 miles upstream at datum
9.79 ft higher.
AVERAGE DISCHARGE. --58 years, 10,820 cfs (7,839,000 acre-ft per year); l5-year base period (1952-67), 10,070 cfs.
EXTREMES.--Current year: Maximum discharîe, 35,000 cfs Air. 28 (gage height, 12.21 ft); minimum, 6,430 cfs July
13 (gage height, 3.14 ttl; minimum dai y, 7,030 CfS Ju y 254
Period of reOord: Maximum discharge, 47,300 cfs June 22, 1918 (gage height, 13.95 ft, site and datum then
in use); minimum recorded, 3,900 cfs July 9, 1949 (gage height, 2.53 ft); minimum daily, 5,440 cfs Aug. 4,1914.
REMARKS. --Records excellent. Major regulation by Amrican Falls Reservoir 260.5 miles upstream (see sta 13076500).
Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irrigation of aboút2,590,000 acres of which about 701,000 acres are by withdrawals from ground water (1966 determnation).
REVISIONS (WATER YEAS) .--WSP 1737: 1933(M).
DAY
1
2
3
4
5
'hß9010,0009.~90
'1,540
'I. ?¡;O
Rating table (gage height, in feet, and discharge, in cubic feet per second)
3.44.06.0
6,9708,32013,900
8.010.012.0
20,40027,30034,300
neT
DI~CHARG(, IN cueic FEET P(R SECOND, W~rER YEAP OCTOBER 1970 TO SEPTEKBER 1911
JUN JUL
23.30021,100
21,90020,10019,600
12,t,O'"12,70010,300
10.300
10. '100
10.?00
10. (;00
11.300
1 I. ~OO11,900
11,50012.10011.20011.50013.400
12,50012.30012.60012.60012,600
12, BOO12.50011.90013.20013,400
13.40012.50013.60012,70012.700
363.30012.110
13.60010.200720.600
'WV
12.60013,100
1 l. 30012.60013.700
14,200\l,50014.10017.50015.500
i 5, 500U.l0013.'10014.300
14,300
14.000
13,90014.90013.90014.200
14.70013.60012.400
14,500
13.900
14.00015.20015.40015,30015.40015.300
441.80014.25017.50012.400876.300
CAL YR 1970 TOTAL 4.228.150
WTR YR 1971 TOTAL 5.775.620
6
7
8
9
10
9,810
'1.7509,540
'I. ~IO9.330
11
12
13
14
15
9.810
10.50012.50011,90010.900
16
17
18
19
20
21
2223
24
25
26
27
28
29
30
31
12.50012.20012.20012.20013.000
12.50012.40013.00013.20012.400
12.70013.000
12.40012.30013.00013.000
TOTAL
MEAN
MAX
MIN
AC-FT
354.15011.42013.2009.280702.500
riEC
15,400
15,40015,500
15,500
13,800
11,9001,.90014,70015.50016.000
14.00015,50016,80015.60015.100
15.40022,00028,10032.90030.400
26.50020.00020.30019.60019,000
18.40018.20018,10019.30018.60018.000
568.400
18.340
32.900
11.900
1,127M
MEAN 11.580
MEAN 15.820
JA\j
IB,50,)
18,4DO
18,900
18.BOO17,100
17 .00017.00017,20011.30018.600
IB.20016.'10018.20017.80018,300
18.30018.10017.90018.100
17 .900
11.50017.600
11.30017.50015.600
\13.50013.50012.800
484.50017.30018.90012.800961.000
MAX 24.600
KAX 33.600
FER
10.'10012.200
I, ,(,00
12, 'jOO
13 .400
14.60012,900
13.40013 .000
13,HOO
12,90013.00013.20013,80013,500
12.60012.900
13 .10013.70014,100
13.80013.30016.00013.10019.400
14.700
17,50016.80018,90016.80021.800
444.20014.33021.80010.900881.100
flAR
,4,80028,50028,60027,70025.300
25,90025.10021.70026.80028.900
30.00029.90030.70030.300
29.500
2'1.20029,100.26.60029,10030.800
29.80029.00028.10028.20029.200
29.300
33.30033.60031.80031.600
868.40028.95033,60024.800
1.122M
MIN 6.510
MIN 7.030
APR
29.00028,700
2A,500
2B,OOO27,900
27,900
29.2ÚO
2'1,800iO,20030,100
30.10030,500
31'¡OO30,000
31,100
30.30030.70028.60028.60028.400
25.80027.10027.00027.20025.300
19.90020.20021.90020.90019.50017.700
841.20027.14031.10017.7001.669M
MAY
17,600
19,100
18,300
23.70022.800
23.50023.80024.70023.50021.500
19.90019.00017.70018.10018.800'
17.40019.20020.00017.50014.400
14.20015.80016.80014.20014.800
15.80017.50018.00020.70021.300
569.60018.99024.70014,2001.130M
AC-FT 8.387.000
AC-FT 11.460.000
14,20015,z00
14,30013,40013.900
11.10010,1008.1207,1607.510
8.4607.2707.3707.2707.140
7'¡107.1307.2307.1307,030
7.2807.5007.5207.5007.3107.190
340.89011.00023.3007.030676.200
7,1607,100
7,1301,2701,290
7.3207.2607.2607.2907.500
1.4507,3307,4307.4801.470
7,4707,2807,4107.5507.420
7.4207.5407.1507.1407.380
7.6107.3207.3207.3707.6808.130
228.9307.3858.1307.10045...100
AUG SEP
8,2408,9608,0507,990,. 8.620
8.5308.860
8,h209,1909.130
9,4508.3708.580
8, aiO8,730
8,3409,0308,7108,5808.950
9.2109.9209.9809.5909.540
9.1709.4109,8609.8309.800
270,2509.0089.9807,990536,000
1V4P~.
SNAKE RIVER MAIN STEM
13172500 Snake River near Murphy, Idaho
LOCATION.--Lat 43°17'31", long 116°25'12", in NW\¡NE\¡SE\¡ sec.35, T.l 5., R.l W., Ada County, on right bank 4.2
miles downstream from Swan Falls powerplant, 7.5 miles northeast of Murphy, and at mile 453.5.
DRANAGE ARA. --41, 900 sq mi, approximately.
PERIOD OF RECORD. --August to October 1912, August 1913 to current year.
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft above mean sea level. Prior to Sept. 7, 1914, non-
recording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 miles upstream at datum
9.79 ft higher.
AVERAGE DISCHAGE.--59 years, 10,910 cfs (7,904,000 acre-ft per year); 15-year base period (1952-67), 10,070 cfs.
EXTREMES.--Current year: Maximum discharge, 31,700 cfs Mar. 3 (gage heisht, 11.15 ft); minimum, 6,890 cfs Aug.
20 (gage height, 3.26 ft); minimum daily, 7,050 cfs July 19,20. Ii
Period of record: Maximum discharge, 47,300 cfs June 22, 1918 (gage height, 13.95 ft, site and datum then
in use); minimum recorded, 3,900 cfs July 9, 1949 (gage height, 2.53 ft); minimum daily, 5,440 cfs Aug. 4,1914.
REMAS.--Records excellent. Major regulation by American Falls Reservoir 260.5 miles upstream (see sta 13076500).
Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irrigation of about2,590,000 acres of which about 701,000 acres are by withdrawals from ground water (1966 determination).
REVISIONS (WATER YEARS) .--WSP 1737: 1933(M).
DISCHARGE,IN CUBIC FEET PER SECOND,WATER YEAR OCTOBER 1971 TO SEPTEMBER 1972
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUl AUG SEP
1 10,200 19,800 20,100 17,600 ,17,700 25,700 26,10C 18,900 11,000 13,300 7,600 8,270
2 13,000 21,800 20.100 17,700 17,500 20,600 25,300 18,400 10.900 11,300 7...00 8,340
3 14,500 21,200 20,000 18,000 17 ,000 22,700 26,000 19,500 10,400 9,830 1,360 8,010
4 17,"00 20,800 18,800 18,100 15,900 28,400 27,100 19,400 9,9..0 8,640 7,620 8,540
5 17,200 21,900 19,600 16,500 16,000 22,800 26,100 18,100 11,500 7,330 7,620,_8,840
6 15,600 21,900 17,900 15,000 15,000 21,100 25,600 16,900 11 ,300 7,4"0 7,580 8,540
7 17,500 21,400 18,500 15,6CO 16,10'J 23,500 24,600 16,600 13,800 7,530 7,400 9,780
8 17,200 Z1,7CO 17,700 16,500 17,000 23, 800 24,500 17,900 16,700 7,420 7,600 8.760
9 17,500 22,100 17 ,900 16,600 17,5QC 22,700 25,100 17,100 '19,200 7,330 7,600 9,890
10 17,700 20,800 17,400 15,400 16,700 22,900 25,600 15,800 23,100 7,440 7,550 8,510
11 19,300 21,000 18,000 16,000 17,400 24,500 26,800 13.900 25,700 7,420 1,510 9,730
12 18,400 19,400 17,700 14,100 18,000 25,100 26,100 15,100 25,700 7,420 7,440 10,500
13 18,500 18,100 18,ItC li, 900 19,100 24,700 27,600 13. 100 25,600 7,330 7,600 10,300
14 18,100 17,100 18,300 16,800 18,600 22,700 27,900 13,400 25,300 7,250 7,580 10,200
15 18,300 15,500 16,700 15,200 18,400 18,800 27,900 15,500 24,600 7,200 8,030 10,100
16 17,600 15,800 16,200 16,300 19,600 18,100 28,700 17 ,200 21,300 7,220 7,580 10,300
17 19,000 18,500 15,300 18,000 19,200 16,700 29,200 15,700 20,700 7,160 8, iao 10,300
18 19,500 20.800 16,400 16,900 19,200 17,200.28,800 13,400 20,100 7,100 7,550 10,700
19 19.300 20,300 17,600 20,300 20,500 18,200 27,400 11,600 19,800 7,050 8, 3 It 10,300
20 20,000 21,400 18,000 25,800 20,000 17,700 26,400 12,100 17,600 7,050'7,800 10,200
21 20,300 21,300 16,700 20,400 19,10"18,400 25,900 13,800 15,500 7,080 8,420 10,3002220,400 20,300 16,900 22.700 19,200 18,600 25,400 16,900 16,200 7,100 8,320 9,7302320,400 19,500 17,100 25,200 19,6:10 20,700 24,100 20,300 16,300 7,330 8,220 9,910
24 19,400 19,100 17,900 24,700 18,300 21,300 23,400 18,100 16,100 7,270 7,780 9,7802520,000 19,400 18,300 20,800 19,500 23,400 23,200 15,800 13,600 7,290 8,420 9,730
26 20,600 20,100 17,300 19,600 19,200 25,000 23,600 18,700 13,200 7,....0 7,970 10,5002721,200 19,300 17,200 20,200 19,600 25,300 22,000 19,900 13,200 7,400 8,320 10,600
28 21,100 19,500 16,700 18,600 20,400 25,100 21,800 18,200 13,600 7,290 8,370 10,7002922,400 19,6GO 16,200 17,300 25,700 26,000 19,600 18,100 15,800 7,290 8,440 11,1003022,800 19,500 14,100 18,000 27,900 19,500 17,900 15,800 7,270 8,760 10,9003119,200 17 ,900 17,200 27,800 13,700 7,380 8,440
TOTAL 573,600 598,900 546,900 566,000 537,000 697,400 761,300'511,000 513,540 239,900 244,400 293,360
MEAN 18,500 19,960 17,640 18,260 18,520 22,500 25,380 16,480 17,120 7,739 7,881t 9,779
MAX 22,800 22,100 20,100 25,800 25,700 28,lt00 29,200 20,300 25,700 13,300 8,760 Ihl00MIN10,200 15,500 14,100 14,100 15,000 16,700 19,500 11,600 9,940 7,050 7,360 8,010
AC~FT 1, 138M 1,188M 1,085M l,123M l,065M 1,383M ltSl0M l,OlltM I,019M 1t75,800 1t84,800 581,900
CAL YR 1971 TOTAL 6,335,770 MEAN 17,360 MAX 33,600 MIN 7,030 AC-FT 12,570,000
WTR YR 1972 TOTAL 6,083,300 MEAN 16,620 MAX 29,200 MIN 7,050 AC-FT 12,070,000
M Expressed in thousands.
fid;~1Z3
SNAKE RIVER MAIN STEM
13172500 Snake River near Murphy, Idaho
LOCATION.--Lat 43°17'31., long 116°25'12., in NW~NE~SE~ sec.35, T.1 S., R.l W., Ada County, on right bank 4.2
mi (6.S km) downstream from Swan Falls powerp1ant, 7.5 mi (12.1 km) northeast of Murhy, and a~ mile 453.5
(729.7 km).
DRAINAGE ARA.--41,900 sq mi (10S,500 sq km), approximately.
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft (692.253 m) above mean sea level. Prior to Sept. 7,1914, nonrecording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 mi (5.6 km)
upstream at datum 9.79 ft (2.9S4 m) higher.
AVERAGE DISCHAGE.--60 years, 10,940 cfs (309.S cu m/s) 7,926,000 acre-ft/yr (9,770 cu hmyr); IS-year base
period (1952-67),' 10,070 cfs (285.2 cu m/s).
EXTRES. --Current year, Maximum discharge, 21,900 cfsmaximum 'gage height, ,. . m; minimum isc arge,
or 0.S53 m); minimum daily, 5,910 cfs ( cu s u y , .
Period of record, Maximum discharge, 47,300 (1,340 cu m/s) cfs June 22, L91S (gage height, 13.95 ft or
4.242 m, site and datum then in use); minimum recorded, 3,900 cfs (110 cu m/s) July 9, 1949 (gage height, 2.53
ft or 0.771 m); minimum daily, 5,440 cfs (154 cu m/s) Aug. 4, 1914.
179
(gage height, S.25 ft or 2.515 m);cu s Jul 14 (gage height, 2.80 ft
RERKS.--Records good. Major regulation by American Falls Reservoir 260.5 mi (419.1 km) upstream (see sta
13076500). Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irriga-
tion of about 2,590,000 acres (1,050,000 sq hm) of which about 701,000 acres (284,000 sq hm) are by withdrawals
from ground water (1966 determination).
REISIONS (WATER YEA) .--WSP 1737: 1933 (M) .
DAY
TOTAL
MEAN
MAX
MIN
AC-FT
.
1
2
3
4
5
11,20012,10011,10011.7001,,000
12,700
14,800
17,40018,20018.300
Rating table (gage height, in feet, and discharge, in cubic feet per second)
(Shifting-control mèthod used Oct. 1 to Feb. 24)
3.04.06.0
5,560S,240
13,900
8.010.0 20,40027,300
OCT
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1972 TO SEPTEMBER 1973
JUN
19,000
18,200
18,700
19,10019.000
18,70017,900
18,10019,00018,500
17,10016,80017,80018,90019.100
18,80018,60018.60018.60018.500
18.800lS,30017.S00
17.40017.100
17.30018.00016.80018,10017,500
546,10018,20019,10016,800
1,08314
NOV
13,900
16,80019,50019,40018,900
lS,OOO17,50015,40016,80017,600
17,40017,80017,50017.00016.300
16.10016,20015,50016,40016,100
17,60017,800lS.00020,30020,500
19,80019,700
19,40.018,80019,70018,500
550,20017,75020,50013,900
1,09114
DEC
18,10018,30017.20017.400
17 ,100
14,20013,70016,80018,00014,600
15,20015,900
16,70018,30018,600
17,20016,90019,40019,80019,400
19,00018,60019,10019,20017,100
16,20017,40016,20015,60015,300l',SOO
531,30017,14019,80013,700
1,05414
CAL YR 1972 TOTAL 5,977,300 MEAN 16.330
WTR YR 1973 TOTAL 4,657,040 MEAN 12.760
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
19,100lS,60018,70017.70019.200
19,90019.300
19,60019,60021,100
20,30020,200
19,400
19,40018,900
M Expressed in thousands.
26
27
28
29
30
31
16,60012,30010,90013,00016,400
17,400
JAN
17,60016,60015,30015,40015,400
16,50016.60016,50018,10019,000
19,00019.000
18,900 _18,401('17,300
16,40016,90016,70015,50015,200
15,30015,30015,50015,40015,400
16,00016,70017,300
467,20016.69019,00015,200926,700
MAX 29,200
MAX 21,100
FEB
17,70018,20019,20016,700
17 ,SOO
lS,500
17,SOO
17 ,400
16, SOO
17 ,300
15,80015,50015,50015,60015,900
15,900
16,90016,000
17 .00016,300
15,90015,40015,60015,50015,500
14,40014,40012,200
12,10011,500
10,900
491,20015,B5019;20010,900974,300
MAR
11,30012,20014.00013,20013,200
12,80013,800
1-4,60013,30014.400
14,30015,00014,40016,20015,900
lS,70020,60019.000
18.50013,700
15,300l',900
14,70014,40014,000
10,90010,30010,50010,50012,200
426,800l',23020,60010,300846,600
MIN 7,050
"'IN 5,910
APR
11,60012,6009,6009,4009,130
9,0607,3207,9208,1607,5~0
7,9307.7007.8407,6907,970
7,8207,5207,7807,3207,800
7,860
S,2807,9107,5107,790
7,7407,4608,0707,350
7,4107,470
254,5908,21312,6007.320505,000
MAY
7,4407,4307.4307,4507.390
7,4207,170
7,4207,2007,230
6,7506,7006,6706,7106,830
7,6708,3708,3207,9407,730
7,3507,200
6,6406,7406,780
6,6006,5006,2106,0506,070
213,4107,1148,3706,050423,300
AC-FT 11,860,000AC-FT 9,237,000
6,0606,1706,1506,1106,060
5,910
5,9205,9305,9405,920
5,9205,9105,9606,0206,200
6,0706,2106,1506,1506,250
6,6906,870
7,1707,1307,360
7,0306,9906,8006,820
6,8306,760
197,4606,3707,3605,910391,700
JUL
6,7206,7406,660
6,8306,800
6,8,306,7006,6506,7306,730
6,6406,5406,4606,2706,540
6,4106,2006,2006,3206,610
6,7106,6806,7406,8306,560
6,8407,2007,3307,0906,8607,100
207,5206,6947,3306,200411,600
AUG
8,8608,6208,64010,1009,910
9,500
10,3009,2908,4709,460
254,1608,472
10,3007,060504,100
SEP
7,060
7,3808,7008,0508,300
8,5S0s,oio7,7907,4907,880
8,1507,5508,1108,0907,820
7,9908,8908,2008,4208,550
517,10016,68021,10010,900
1,02614
?!a/~~"'7Lir "1. SNAKE RIVER MAIN STEM
13172500 Snake River near Murphy, Idaho
LOTION.--Lat 43°17'31", long 116°25'12", in NW~NE~SE~ sec.35, T.1 S., R.1 W., Ada
~2J~78km~~ downstream from Swan Falls powerp1ant, 7.5 mi (12.1 km) northeast of
DRAINAGE ARA.--41,900 sq mi (108,500 sq km), approximately.
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
GAGE.--Water-stage.recorder. Datum of gage is 2,271.17 ft (692.253 m) above mean sea level. Prior to Sept. 7,
1914, nonrecord~ng gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 mi (5.6 km)
upstream at datum 9.79 ft (2.984 m) higher.
AVERAGE DISCHAGE.-~61 years, 10,990 cfs (311.2 cu m/s) 7,962,000 acre-ft/yr (9,820 cu hm/yr); 15-year baseperiod (1952-67), 10,070 cfs (285.2 cu m/s).
County, on right bank 4.2
Murphy, and at mile 453.5
EXTRES.--c~rrent year: Maximum discharge, 31,800 cfs 901 cu A r. 24
minimum d~scharge, 5,740 cfs (163 cu m/s) u y gage e g . t or(167 cU~/SI July 21... "
Perl ?f record: Maximum discharge, ,47,300 (1 340 cu m sl cfs June 22 1918 (gage height, 13.95 ft or4.242 m, s~te and datum then in usel; min~mum recor c s cu J 1 9 1949 ( h . h 2ft or 0.771 m); minimum daily, 5,440 cfs (154 cu m/sl Åug: 4, 1914. s u y, gage e~g t, .53
RERKS.--Records good. Major regulation by American Falls Reservoir 260.5 mi (419.1 km) upstream (see sta
13076500). Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irriga-tfion of about 2,590,000 acres (1,050,000 sq hm) of which about 701,000 acres (284 000 sq hm) are by withdrawalsrom ground water (1966 determination). '
REVISIONS (WATER YEAR) .--WSP 1737: 1933(M).
Rating table (gage height, in feet, and discharge, in cubic feet per second)
(Shifting-control method used Dec. 30, 31, Jan. 19, 31, Feb. 2 to June 15, June 24 to July 7)
DAY
1
2
3
4
5
8,9409,1308,7008,Z708,510
3.04.06.0
5,560
8,240 .13,900
8.010.011.0
20,40027,30030,800
OCT
DISCHARGE, IN CU8IC FEET PER SECOND, WATER YEAR OCT08ER 1973 TO SEPTEMBER 1974
JUN
9,Z709,8809,4309,6909,770
9,8BO
11,00010,10010,300
10,400
10,8009,670
10,80010,400
ia, zoo
10, iao10, zoo10,50010,50010,300
10,500
10,50010,50010,50010,900
10,50010,40011, zoo10,90010dOO
309,39010d10
11, zoo9,Z70613.700
NOV
10,90010,70010,50011,000
11 ,400
11,600
11 ,400
11 ,600
1 Z, 400
1Z,600
LZ,8001Z,60013,10011,40011,800
11,70011,80011,80011,90011,900
1Z,OOO
1Z,OOO
LZ,OOO1Z,10011,800
LZ,OOO11,30011,500
10 ,40013,30013,300
366,60011,830
13,30010,400
727,ZOO
CAL YR 1973 TOTAL 4,006,370
WTR YR 1974 TOTAL 4,990,890
M Expressed in thousands.
6
7
8
')
10
11
12
13
14
15
9,000
,8,760
"9,OZO8,8609,770
9,9109,770
9,8509,690'1,430
16
17
18
19
20
21
2Z
23
24
25
9,1909,880
9,5309,370
8,R40
'1,2909,0509,1209,2909,210
26
27
28
29
30
31
9,2709,6409,2908,9209,6409,000
TOTAL
~EAN
"'AX
MIN
AC-FT
266,7409,2509,9108,Z70568,700
DEC
1Z ,00011,40010,20010,200
11 ,600
12,00010,900
11 ,600
11,600
11 ,000
llt90011,200ia, ioa11,500
1Z, 000
14, iao14,60014,900
15,ZOO13,500
13,600
LZ,500
11 ,800
11 ,6'00LZ,500
LZ,60012,00010,900
11 ,80012,30013,400
376,500
12,150
15,20010,100746,800
MEAN 10,980
MEAN 13,670
JAN
13 tiOO13,500
14,ZOO
13 ,80014,700
15,00014,50015,300
15,80016,000
14,60014,80015,50015,90015,400
15,40015,40014,800
16,ZOO19,500
16,700
14,50013,70013,50015,000
16,60016,10017,700
427,200
15,260
19,50013,i00847,400
MAX 20,600
MAX Z'I ,000
FEB
16,50015,700
15,ZOC
Ib ,900
17 ,80C
19,60020, soc20,400
24,30023,800
23,'100Z4,100
23 ,bOO24,80025,600
25,800
Z9,ZOO27,50027,30026,100
26,30025,40e24,00023,40023,900
21,ioe
16,000
13, boe15,90014,70U20,800
672,70021,70028,20013,600
1 ,334~
~AR
22,40025,20025,40024,80025,100
25,40025,20024,700
24,90022,600
22,80024,30024,20027,i0027,600
Z6,80025,10024,90024,50027,800
26,00025,20028,10029,00025,900
25,i0025,50025,00022,80027,200
760,bOO
25,35029,0002Z,400
1,509M
~lN 5,910~IN 5,900
APR
25,30024,50024,00022,10022,700
23,00023,30023,700
23,200Z3,200
23,00023,10024,00022,40022,000
21,30020,300
18,bOO18,20016,800
17,300
16,20016,700
16, zoo16,700
15,70015,60015,80016,40014,20014,800
620,30020,01025,30014,200l,230M
"AY
16,40017,40016,60017,10016,700
16,20016,20015,800
16,50016,500
16,50016,50015,70015,10014,700
12,00010,30012,20011,600
11,600
11,700
11,60012,90015,50015,500
15,50015,20014,60014,60014,800
443,50014,78017,40010,300879,700
AC-FT 7,947,000
AC-FT 9,899,000
15,00015,50015,50014,00014,500
15,40013,30012,4009,290
'1,510
7,8608,700
7,9707,9707,400
6,8106,2206,2406,3006ti60
5,9005,9206,3006,3806,300
6,Z20601906,i60
601606,1905,970
273,7208,83015.5005,900542,900
JUL
6,0806,3006,4106,5706,650
7,190
6,6806,7306,6507,000
7,2107,3007,2707,1906,650
6,6806,9206,8706,7306,760
6,9706,9506,9206,920
70190
7,2107,0506,9206,7606,8406,950
212,5206,855
7,3006,080421,500
AUG
241,1208,0378,8906,970478,300
7,0006,9707,0007,0307,460
7,540
7,4807,4307,4301,510
1,7607,1007,9508,1408,300
8,7308,7308,8908,5908,510
8,4908,8608,6508,5108,810
8,3808,2708,2708,3008,430
185
m);cfs
SEP
'JYøIt" /t1
SNAKE RIVER MAIN STEM
13172500 Snake River near Murphy, Idaho
LOATION.--Lat 43°17'31", long 116°25'12", in NWkNEkSEk sec.35, T.l S., R.l W., Ada County, on right bank 4.2
mi (6.8 km) downstream from Swan Falls powerplant, 7.5 mi (12.1 km) northeast of Murphy, and at mile 453.5
(729.7 km).
DRAINA ARE.--41,900 sq mi (108,500 sq km), approximately.
PERIOD OF RECORO.--August to October 1912, August 1913 to current year.
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft (692.253 m) aboe mean sea level. Prior to Sept. 7,
1914, nonrecording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 mi (5.6 km)
upstream at datum 9.79 ft (2.984 m) higher.
AVERAGE DISCHARGE.--62 years, 11,040 cfs (312.7 cu m!s) 7,998,000 acre-ft/yr (9,840 cu hm/yr), 15-year baseperiod (1952-67), 10,070 cfs (285.2 cu m/s).
EXTREMEs.--Current yeari Maimum discharge, 28 200 cfs
minimum discharge, 5,580 cfs (158 cu m/s) Aug.(162 cu m/s) Aug. 1,
periOd of record. Maximum discharge, 47,300 (1,340 cu m/s) cfs June 22, 1918 (gage height, 13.95 ft or
4.242 m, site and datum then in use), minimum recorded, 3,900 cfs (110 cu m/s) July 9, 1949 (gage height, 2.53
ft or 0.771 m)¡ minimum daily, 5,440 cfs (154 cu m/s) Aug. 4, 1914.
RES.--Records good. Major regulation by American Falls Reservoir 260.5 mi (419.1 km) upstrl'am (see sta
13076500). Diurnal fluctuation caused by hydroelectric plants upstream. Diversions abve station for irriga-
tion of about 2,590,000 acres (1,050,000 sq hm) of which about 701,000 acres (284,000 sq hm) are by withdrawalsfrom ground water (1966 determination).
REVISIONS (WATER YEAR) .--WSP 17371 1933(M).
DAY
1
23
4
5
6.7
8
9
10
11
12'
131415
16
17
18
1'920
21
2223
2425
26
2.1
2429
30
31
lOTAI.
MlAN
MAX
MIN
AC.,F'
OCT
8.8609.130~.1609.0208.700
Rating table (gage height, in feet, and discharge, in cubic feet per seoond)
3.04.06.0
5,5608,24013,900
8.010.011.0
20,400
27,300
30,800
DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1974 TO SEPTEMBER 1975
12.40012.50012.70012.40012.500
12t10013.00012.900
110900
110200
10.60010.60010.80010.70011.000
10.80011.30012.100
15.10015.100
10.600
11.80010.300
12.40011.400
12.40012,00011.90012.000
l2.200
369.30011.98015.10010.300712.700
NOV
11080012.20012.80013.10014.000
14.80013.10013.700
12.80013.300
12.50013.40014.100
13.80013.800
13.70014.60014.000
13.40013.200
14.30013.00013.00012.500110400
..lt50015.70014.50015.00015.00013.900
4l'.90013.48015.70011.400828.900
DEC JAN
14.20014.00013.50013.90014.100
15.00015.00017.000
15.10015.300
FEB
13.90013.80014.20014.90014.600
14.90014.80014.80014.80014.800
15.30015.90015.60016.30017.900
16.00015.20015.30015.40015.300
13.20013.10015.40015.30014.900
14.40014.600
14.900
419.50014.98017.90013.100832.100
MAR
-IS.70016.90018.70016.90016.400
16.10016.70017.30015.70015.300
13.80012.60012.400oll.90012.100
15.20013.50013.10015.60020.000
22.20021.90021.70021.10021.100
22.60024.10022.30022.50022.400
2CibOO
548.40017.69024.10011.9001.088M
APR
2Oy10022.40022.20019.100ii.200
15.70020.20018.800
1'8.80018.$00
18.20018.30019.60025.20026.700
2fJt300
25.40025.700?,6.40025.900
26.10026.10025.30025.70025.100
23.10024',980
2'3.iOO23.90025.700
680,90022,70026.7001$,700
1,351M
MAY
2$.20025.30025.00022.60020.900
23.80023.90023.60024.10025.100
26,20025,60025.80023.20022,400
21.70024,40025,90025,50024.500
24.40023.70'024.90023.10022.600
22,10023.10023,10021,70021.40020.900
736.30023.75026.20020.9001,460H
JUN
20.700 ,¡21.60020,10019.80019.800
21lt700lS.80019.400ia.400
18.300
17.900n,300
1'1'.100ltt,30013.200
10\,100la.l00U.300
11.000
11 ,800
9.350lh20012.200
16.20014.700
14.70013,4008,8309,811',,750
453.84015.13021,6008,750900,200
CAL. YR 1914 TOTAL'5,128.600 MEAN 14,050 MAX 29.000 MIN 5.900 AC-FT 10.170.000WTR YR 1975 TOTAL 5,059.410 MEAN 13,860 MAX 26.700 MIN 5,710 AC-FT 10.040,000
7.940
'h81O9.6709,3509,590
9.9lD
lIÎ.50010,50010.900
10,.600
10.60011.30010,40010.40010.900
1 OtSOO10.80010.400
10"BOO10.400
10,80012.20012.600
120400
12,/50012.300
323.240--lih43012,8007,940
641.100
M Expressed in thousands.
lli.l00
14..70014.70014.50014'.700
14,70014.70014.60014,50014.500
14..70014.7001..70014,10013.900
13'0900
14,00014.40013.70013.80013.900
449,60014,50017.00013.500891.800
JUL
90320ltt1406.6106.9507,UO
7.7607.360,7,.860
7.,9806.630
7.2207.4007.8807.1707.420
7.0306.6006,6106.3906,240
6.3906.3806,3206.2806,230
6,1705,9305,9105,8905,1705.750
212,7006,8619.3205,750421.900
AUG
~.7106.2506.3606,5407,240
6,.7206,330li.8706.1706.800
6.5606,5206,290
6.4206.340
6.2806,5306,5406.6207...80
7,UO, 7,210, 7,200
7.0507,380
7,2707.2906.9407,0307.1807.180
208.4106,7237...805,710
413'''00
SEP
7.070,7.5208.1808...208.5"0
8.0707.9706,730
709607,380
7.2807.4607."07,7308,260
9,1208.2608.130
8.1108.500
8.7009.4709.390
8.8809.300
9.120
9.0309.190
9,0709.040
249.3208,3119.4706.730494,500
.1V~340 SNAKE RIVER MAIN STEM
13172500 SNAK RIVER NEAR MURPHY, ID
LOCTION.--Lat 43°17'31", long 116°25'12", in NW~NE~SE~ sec.35, T.1 S., R.1 W., Ada County, Hydrologic Unit
17050103, on right bank, 4.2 mi (6.8 km) dowstream from Swan Falls powerp1ant, 7.5 mi (12.1 km) northeast of
Murphy, and at mile 453.5 (729.7 km).
DRAINAGE ARE.--41,900 mi2 (108,500 km2), approximtely.
WATER-DISCHARGE RECORDS
PERIOD OF RECORD.--August to OCtober 1912, August 1913 to current year.
REVISED RECORDS.--WSP 1737: 1933(M).
GAGE.--Wàter-stage recorder. Datum of gage is 2,271.17 ft (692.253 m) above mean sea level. Prior to sept. 7,
1914, nonrecording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 mi (5.6 km)
upstream at datum 9.79 ft (2.984 m) higher.
REMARKS.-- Records ROod. Major regulation by American Falls Reservoir 260.5 mi (419.1 km) upstream (see sta
13076500). Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irriga-
tion of about 2,590,000 acres (1,050,000 hm2) of which about 701,000 acres (284,000 hm2) are by withdrawalsfrom ground water (1966 determination) .
AVERAGE DISCHARGE.--63 years, 11,100 ft3/s (314.4 m3/s) 8,042,000 acre-ft/yr (9,920 hm3/yr).
EXTRES FOR PERIOD
EXTREMES FOR CURRNT YEAR.--Maximum discharge, ~9,700 ft3/s (a41 m3/s) Apr. 12, 13 (gage height, 10.70 ft or
3.261 m); minimum discharge, 5,350 ft3/s (152 m3/s) July 17 (gage height, 2.92 ft or 0.890 m); minimum daily,5,~20 ft3/s (153 m3/s) July 17.
Rating table (gage height,in feet,and discharge, in cubic feet per second)
2.9 5,300 8.0 20,4004.0 8,240 10.0 27,3006.0 13,900 11.0 30,800OISCI1I1RGE. IN CUBIC rEFT PER SECOND. WATER YElR OCTOBER 1975 TO 5F.PTEMBER 1976MEANVALUES
OilY OCT NOV DEC JAN FEB MAR APR MIIY JIJN JUL AUG SEp189M12"'0 13BOO 15400 15900 19700 24.00 26200 20000 ..5900 .¡6660,,7B40?9?40 I"AOO 15600 15200 16100 IA900 25200 "5800 20BOn 5530 B040 77303904n12400172no15500166001700025100247001920056607000724049080121;0 17600 15300 16500 17200 24700 2660U 16700 5710 7350 6700591101260016000163001630017400258002560016400557082306830Fo909/\12foO 17000 16900 16300 17800 25900 24200 15400 5560 B380 710071000011'100 17000 17600 14300 15400 25900 25300 13200 5590 7910 7440II9980125001720016500162001140026400261001730056307390809091090012noo17300151001710010500273002670017200561068407640in103001250017600lFo500172no1050028100266001560056406920739C11114001250017200185001700010300282002560016600565070108820I?12400 12500 16800 15"00 16200 11200 28900 25400 18800 5660 7020 1010013153001270017000151001690010BOO'29500 24400 IB500 5660 7020 10200141420012200lFo500163001650010400"B700 24900 1800n 5640 6490 105001512800119001660013600170001440028800"5900 18800 5670 5980 10200lFo1280n11000130001600017200inOO28400"5500 19400 55BO 7950 11000171420012200132001710016200192002890024700186005420814010900IA13FoOO13700155001670016500226002850025300168005450946011100191270n12AOO132001570017100242002730024600157005440875010400"0 13600 12500 14600 16400 15700 24800 28000 23500 14400 5510 8580 10900"I 1350n 13400 15100 15600 16100 2?400 27300,22100 12800 5620 8660 10700,,?1280n 15400 15300 15400 16400 23000 25800 22400 12000 5740 8540 10500?-3 1260n 15400 lf-l00 15900 16500 23100 "5700 23200 10800 6120 8660 1090024I ioon 15500 lFo500 15700 16300 23100 25800 23000 11900 5980 8900 II 1 00.?E;11400 15700 lFo500 15600 16900 23200 25300 22400 12200 5980 8650 110002¡:12Aon 15600 1¡:300 15800 16400 24400 23700 23000 9550 5830 8530 1 I I 00271220n15500lFo30n15800168002330025110022100847059508350112002A1410016AOO163001580017600239002760021900673060708260110002913600lMOO15500158001850024000281002270066506130735011000301290n156001f-900 15800 25000 27600 22200 6440 6390 7290 1060031132001580015900246002090065407940TOTAL3Fo8800404100496500494000480300580800806900753500444940178430242250287220MEANIiC¡OO 13470 16020 15940 16560 lA740 26900 24310 14830 5756 7.1US,-'JLMAX1530016AOO176001850018500250002950026700208006540946011200MIN8960110001300013600143001030023700209006440542059806700AC-FT 731500 80 I 500 984800 979800 952700 1152000 1600000 1495000 882500 353900 4B.QSO S6JlCAL VR 1975 TOTAL 5228370 MEAN 14320 MAX 26700 MIN 5710 AC-FT 10370000WTR VR 1976 TOTAL 5537740 MEAN 15130 MAX 29500 MIN 5420 AC-FT 10980000
Wat /97713172500S::ER::R::RS:::HY, ID
LOCTION.--La 43°17'31", long 116°25'12", in ~NE~SE~ sec.35, T.1 S., R.1 W., Ada County, Hydrologic Unit
17050103, on right bank 4.2 mi (6.8 km) downstream from Swan Falls powerp1ant, 7.5 mi (12.1 km) northeast of
Murphy, and at mile 453.5 (729.7 km).
DRAINAGE ARE.--41,900 mi2 (108,500 km2), approximately.
WATER-DISCHAGE RECORDS
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
REVISED RECORDS.--WSP 1737: 1933 (M).
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft (692.253 m) above mean sea level. Prior to Sept. 7,
1914, nonrecording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 mi (5.6 km)
upstream at datum 9.79 ft (2.984 m) higher.
REMARKS.-- Records 900d. Major regulation by American Falls Reservoir 260.5 mi (419.1 km) upstream (see sta
13076500),. Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irriga-
tion of about 2,590,000 acres (1,050,000 hm2) of which about 701,000 acres (284,000 hm2) are by withdrawalsfrom ground water (1966 determination).
AVERAGE DISCHARGE.--~4 years, 11,Q70 ft3/s (313.5 m3/s)8,Q20,000 acre-ft/yr (9,e90 hm3/yr).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 47,300 ft3/s (1,340 m3/s) June 22, 1918 (gage height, 13.95 ftor 4.242 m, site and datum then in use); minimum recorded, 3,900 ft3/s (110 m3/s) July 9, 1949 (gage height,
2.53 ft or 0.771 m); minimum daily, 5,120 ft3/s (145 m3/s) June 30,1977.
Dec.4 ( age height, 7.55 ft or 2. l01 m);eig , 2.70 ft or 0.~23 m); minimum daily,
DISCHARGE. IN CUBIC FEET PER SECONO. WATER YEAR OCTOBER 1976 TO SEPTEMBER 1977
MEAN VALUES
DAY OCT NOV DEC .JAN FEB . MAR APR MAY JUN JUL AUG SEP
I 10300 12000 14600 11900 12300 10300 7780 6.270 7110 ~5270/5710 ~6730210800121001390012100124001060081406190684052705920676039750131001580012300117001060092406300616054806000670041130012000184001190011800111009000657060505530605065205113001190011200122001170011200935069506050608060806160
6 118,00 12300 17300 11800 11200 11300 8460 7050 62Z0 6050 5970 58407125001190015900l1löOO11400117007240616063505970587065208135001140015700116001130010700759070007670595060306300912500124001570011900113001170063807160624058206190660010123001250015700116001120011200592075106650571063006730
11 13300 12300 14200 11600 10900 11500 7380 6810 7480 5630 6240 649012132001130014300111+00 10900 11300 6410 7050 7510 5630 6270 654013-t4700 11400 13700 11100 12000 10900 7270 7050 7590 5610 6110 657014147001190013000111+00 11100 10000 7110 6890 7590 5320 6050 64901513300126001360011100118001150063806600754053006030"54"..,-
16 13400 12400 13300 11100 11300 11100 6620 6270 7430 5300'5950 64301713000129001160011200111001010068406\130 7270 ~5920 654018,13100 12100 12700 11200 11300 9880 6870 6000 6760 5740 6920191320012400121+00 11600 11300 9800 6700 6130 6680 5370 5790 7000ZO12400'12800 12300 12600 9770 8380 6320 6:;40 6380 5350 5740 6600
21 12000 1~500 12800 11800 9510 7480 6570 7000 6130 5450 5690 730022'11600 . 12400 12100 11800 9720 8920 6620 6780 6190 5450 5660 7130231140012700116001190010100102006600665061605530579071302411600137001160011900102001010065406080603054305950751025 -11400 12700 11700 12000 9930 9590 6870 7300 5950 5760 5820 7300
26 11400 11900 12700 12100 9640 9100 6650 8050 5740 6030 67&0 724027114001350011900121009910873059507:;70 5500 6160 6780 743028111+00 15200 12000 12100 9910 8620 6080 7JOO 5270 6460 6760 1700291160014900127001220099906240711051906080673076203012000147001200012300932062707000~5790 6700 7700311180011700122009100713057406730
TOTAL 377950 377900 424100 366100 306690 316010 211390 212JOO 194850 175370 1119330 205040MEAN1219012600136801183010950101 YO 704b 684d 6495 5657 6107 6835MAX'14700 15200 18400 lZ100 12400 11 700 9350 8b50 7670 6460 6780 1700MIN97501130011600111009510748059206\100 .~5270 5660 5840.~FT 749700 749600 841200 727300 608300 626800 1+19300 421100 386 347800 375500 406700
CAL YR 1976 TOTAL 5448290 MEAN 14890 MAX 29500 MIN 5420 AC-FT 10810000WTR VR 1977 TOTAL 3357630 MEAN 9199 MAi(18400 ""IN 5120 AC-FT 6660000
.. ~
'T
'Y~99
1r~~!~8'SNAK RIVER MAIN STEM .
13172500 SNA RIVER NEAR MUHY, ID
LOTION.--Lat 43°17'31", long 116°25'12", in NWkNEkSEk sec.35, T.l S., R.l W., Ada County, Hydrologic Unit
17050103, on right bank 4.2 mi (6.8 km) downstream from Swan Falls powerplant, 7.5 mi (12.1 km) northeast of
Murphy, and at mile 453.5 (729.7 km).
DRAINAGE AR.--41,900 mi2 (108,500 km2), approximtely.
~~",.., . d.E": WATER-DISCHAGE RECORDS
PEiüOD OF RE~.--AugUst to'octob~~~;~~ugust 1913 to current year.
. '¡-c-""--
REVISED RECORDS.--WSP 1737: 1933(M).
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft (692.253 m) National Geodetic Vertical Datum of 1929.
Prior to Sept. 7, 1914, nonrecording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site
3.5 mi (5.6 km) upstream at datum 9.79 ft (2.984 m) higher.
RES.-- Records ~ood. Major regulation by American Palls Reservoir 260.5 mi (419.1 km) upstream (see sta
13076500) . Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for, irriga-
tion of about 2,590,000 acres (1,050,000 hm2) of which about 701,000 acres (284,000 hm2) are by withdrawalsfrom ground water (1966 determination).
AVERAGE DISCHAGE.--65 years, 11,040 ft3/s (312.7 m3/s) 7,998,000 acre-ft/yr (9,a60 hm3/yr).
EXTRES FOR PERIOD OF RECORD.--Maximum discharge, 47,300 ft3/s (1,340 m3/s) June 22, 1918, gage,height, 13.95 ft
(4.252 m), site and datum then in use; minimum recorded, 3,900 ft3/s (110 m3/s) July 9. 1949, gage height.2.53 ft (0.771 m); minimum daily, 5,120 ft3/s (145 m3/s) June 30, 1977.
minimum discharge, 4,860 ft3/s (138 m3/s)
(149 m3/s) July 17.,
Rating table (gage height, in feet, and discharge, in cubic feet per second)
(Shifting-control method used Oct. 1 to Dec. 22)
DAY
2627
28
29
30
31
TOTAL
MEAN
MAX
MIN
AC-FT
1?
34
C;
7480
7030
7030
7570
1700
2.84.0 5,0408,240 6.08.0 13,90020,400
OCT
DISCHARGE. IN CUbIC FEET PEH SECONO. WATEk YEAR OCTOBER 1~77 TO SEPTEMBER 1978
MEAN VALUES
7910179078101780 '
7111 0
7480
76707"7076607850
1750
71110
7650
7600
7490
78bO
8180
81008100
1680
79207960
80108150
8380
86408390
8610
86208360
238890
79638640
7480473800
CAL YH 1917 TOTAL
WTR YR 1978 TOTAL
"
7
Il
9
10
11
12
13
14
1 c;
170n
74811
7540
7350
73811
7430805n
79707970
795/1
1"
17
III
19
20
8001117607730
789/1
7780
ZI22
Z3
Z4
25
7590
7920
8050
7650
76711
7970
7840
7920
7950
7700
170/1
238750
1702
8050
7030473600
foOV
83008310
112808050
A130
8~508240
8380
83608210
8320
1'0308270A420
9140
1040098909070
78110
8190
8430
1970
82707860
8190
80008300
8140
11320
B410
8190
260420
8401
104007800
516500
29157403239140
DEC
80008190
80&08110
8030
81908240
7~9079208410
849.)
8410
8650
8050
8110
8160
10~00
1080091008300
8840
80S07970
8b20
9H,O
910089208920
8840
8730
8860
265940
8~79
10800
7~90
527~00
JAN
88408970881091608940
8430
8350
9430
109009450
86509640
819086508050
9050
8300
8970861\
8140
83009080
8840
9320
9270
9130
9350
9880
250770
8956
109008050
497400
FF.1
93709510
9850
102009800
10200
10600
104009960
10100
10900
103009800
10900
1'(100
9750
10400
10400
10400in700
114001100011900
11'400
12300
1160010700
11600
12000
11000
11400
330940
10680
124009370
656400
MEAN 7988 MAX lZ700
ME AN 8874 MAX 17600
MAR
¡¿ZOO110001100010100
10500
10400
11400
14500
1290013500
1370013300
13900
13600
11800
12000
11700
12000
12100
11400
15800
11600
16700
16700
1bOOO
1bOOO
15Z00
15600
15"00
15100
403100
13440
17600
10100
799500
MIN 5120MIN 5270
APR
15000
15000l'..00
12:.00
11~00
10/00
141000
140101113..00
13'000
13100
11bOO
11-s00
l1"'Ou12/00
13~OO12!00
9-S20
1001008/60
9-SZu
91$00
12JOO
111:00
11400
11900
12bOO
11900
11900
11::00
11100
375800
12!20
150008760
745..00
AC-FT
AC-FT
MAY JUN
10700
8680
7540
7240
7270
6680740072107080
6840
7050
ilOOO
803n
14307430
7430
6700
5950
66006970
639n680068106540
6030
60005590
5960
5780
5780
209910
6997
107005590416400
57830006425000
JUL
54605470
5550
5430
6110
6340
6880
7160
66107000
5800563059106170
5830
562052705560
5380
5410
5380
5390
5510
6420
57bO
5720
5880
5750573058905960
18198058707160
5270
361000
~62906030569057505940
61106290
5900
6140
60Z0
5720579058105990
63bO
6780658071707b40
7610
7530
7670
7480
b910
7120
68107030
6870
6790
6910
7050
203780
657476705690404200
(2.323 m);
5,270 ft3/s
AUG SEP
6tl6U
6850
6840
68306980
845088009440
9490
9500
104009650
10600
12900
11400
110008510
8950
9070
9540
9730
10000
10100
10100
10000
100009920
8840
9630
8480
278860
9295
12900
6830
553100
"
lÝ~J./ j ~;iy' /1~a3172500SNAKE RIVER MAIN STEM
~3 SNAKE RIVER NEAR MURPHY, ID
LOCATION.--Lat 43°17'31", long 116°25'12", in NW~NE~SE~ sec.35, T.1 S., R.1 W., Ada County, Hydrologic Unit
17050103, on right bank 4.2 mi (6.8 km) downstream from Swan Falls powerp1ant, 7.5 mi (12.1 km) northeast'ofMurphy, and at mile 453.5 (729.7 kml.
DRAINAGE AREA.--41,900 mi2 (108,500 km2) , approximately.
WATER-DISCHARGE RECORDS
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
REVISED RECORDS. --WSP 1737: 1933 (M) .
GAG~.~-wa~er;st~ge7re~~~~er. Datum ~f gage is 2,271.17 ft (692.253 m) National Geodetic Vertical Datum of 1929.
3r~or. 0(5 e6Pk.), , nonrecording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site. mi . m upstream at datum 9.79 ft (2.984 ml higher.
RERKS.-- Recor~s good. Major.regu1ation by American Falls Reservoir 260.5 mi (419.1 km) upstream (see sta
~i0765~0)b' Diurna1 f1uctuation caused by hydroelectric plants upstream. Diversions above station for irriga-on 0 a out 2,590,000 acres (1,050,000 hm2) of which about 701 000 acres (284 000 hm2) are by withdrawalsfrom ground water (1966 determination). "
AVERAGE DISCHAGE.--66 years, 11,030 ft'/s (312 4 '/) 7 991 000 /. m s '\' acre-ft yr (9,850 hm' /yr) .
EXTREMES FOR PERIOD OF RECORD.--Ma~imum dis7harge, 47,300 ft'/s (1,340 m'/s) June 22, i918, gage height, 13.95 ft
(4.252 m), site and ~a~um the~ in use; minimum recorded, 3,900 ft'/s (110 m'/s) July 9, 1949, gage height,
2.53 ft (0.771 m) i minimum dai1y, 5,000 ft'/s (142 m'/s) July 2, 6, 1979.
EXT~S FOR.CURRNT YEAR.-.Maximum discharge, 24,400 ft'/s (691 m'/sl Jan. 13, gage height, 9.44 ft (2.877 m);
minimum discharge, 4,640 ft'/s (131 m'/s) July 3 gage height 2 58 ft (0 786 m)' minimum daily, 5,00& ft'/s(142 m'/s) July 2, 6. ".. ,
ç,tgm
L10f".-,
Rating table (gage height, in feet, and discharge, in cubic feet per second)
~ :: Jli.5,; ~:~/' "iT6.0
DAY
1
;.
34
C;
6
7
H
9
10
IIP
13
14
15
..6..0
9100
10600
101009870
1/\
17
1'1I"
20
11200
10400
10..0010500
10500
212?
23
24
?5
10500
J 0"0010400
103009960
,2/\n
2829
30
31
96109nO
1040011100
12100
12000
TOTAL
"i:~N
MAX
MIN
AC~F T
3042109811-
12100
6\110603400
CAL Y~ 1978 TOTAL
~TR Yk 1979 TOT AL
4970
859014300
8.09.0 2020023100
OCT
DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1918 TO SEPTEMBER 1979
MEAN VALUES
8820
8990
tl340b910
7060
12700
12600
11900
1130011800
NOV DEC
11\100llbOO
11800
1270013000
1240\112700
11400
12600
12900
1360\1
11500
11600
12900
11900
1310u
1580022800
1780U15700
15900
1590U
1530014900
15500
15000
1400014600
1430013900
1380U
1360014000
13800
1400U
14700
441900
1425022800
11400876500
MEAN 9108
MEAI' 10b80
JAI'FEB
15500
1550015500
15500
15500
15500
1570016000lb500
15600
15500
14800
1550012600
15200
12200
15bOO
1400012700
13200
1330014500
14800
14100
13500
13600
15100
13600
16100
16300
15100
15200
1550015400
15900
16000
15700
1590015900
15900
15900
17100
16900
15700
17600
17600
1800018300
1880018500
17900
493700
159301!l00
13300979300
MAR APR MAY
8'l9U
B96U
9160
8540
772\1
7bl08140
8030
711909420
8160
7750153071307500
792u
69706880
6910
7330
2424607821_
9420
6880480900
AC-rTAC-FT
JUN
76407500
7200
67006500
65006600
66006700
6700
64506300
6500
63006240
7010
823074707bl07470
6210
61806100
6830
7640
6940671065206660
6520
64406460
62406160
5800
JUL
5630
5000
522050505220
50005020
505050505080
50805110
505050805110
5080
54605490
5330
5440
5440544058005800
5740
1679605418 _
62705000
333100
AUG
5910
6320
62706240
6130
6010
6050
61306050
6070
5110
613062106210
59605910
6910
8B80993010100
10400
93909190
95608960
8090
11008230
18601950
7750
1920
77207720
181080008060
239430 2386507724c: 195510100 93305910 6990
414900 413400
111
SEP
8140
8120
84008510
8190
8400
1580
69907360
1020
1240
730014101410
1080
83409330
88808170
1830
1330
1530
81101830
1890
8510
811083..08'008090
tl6t:0
9390
95609300
1'790
112uo12500
12000
11200
11400
10900
1100011900
11500
11600
12700
12700
1270012400
12600
12900
1300013000
1300012200
11700
119001270012500
13600
364600
12150131\0
10900123200
1?40013300
12800
12100
81120
10300
1?400
126001130013200
12300
11500
1060011t:00
1?700
111100
1160011900
127001?l00
I?OOO
1300012900
1250012400
10900
373520
1205013300
1'820140900
3543410
38911750
13100
12500
12900
13300
13300
12900
1300013000
402100
14360Ib500
12200197600
MAX 17600
MAX 22800
1780017500
16900
14300
10800
11800
11800
13400
1640018800
177001650017000
16100
16100
IblOO
15300
14'l0014600
13500
12100
1330013400
1340013400
13400
12500122009780
11000
432380
1441018800
'l180857600
MIN 5210
"IN SOOO
18bO
1.J60
7lbO1330
1::80lb40
1918406595
76405800392400
1028000
7733000
.1V~y/ jea'lito
114
.
SNAKE RIVER MAIN STE
13172500 SNAE RIVER NEAR MURPHY, 10
LOCTION.--Lat 43.17'31", long 116.25'12", in NWi.NEi.SEk sec.35, T.l S., R.l W., Ada County, Hydrologic Unit
17050103, on right bank 4.2 mi (6.8 km) downstream from Swan Falls powerplant, 7.5 mi (12.1 km) northeast of
Murphy" and at mile 453.5 (729.7 km).
DRAINAGE AREA.--41,900 mi2 (108,500 km2), approximately.
WATER-DISCHARGE RECORDS
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
REISED RECORDS.--WSP 1737: 1933 (M).
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft (692.253 m) National Geodetic Vertical Datum of 1929.
Prior to Sept. 7, 1914, nonrecording gage and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site
3.5 mi (5.6 km) upstream at datum 9.79 ft (2.984 m) higher.
RERKS ._- Records good. Major regulation by American Falls Reservoir 260.5 mi (419.1 kr) upstream (see sta
13076'500). Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irrig~-
~ion of about 2,590,000 acres (1,050,000 hr2) of which about 701,000 acres (284,000 hr2) are by withdrawalsfrom ground water (1966 determination).
AVERAGE DISCHAGE.--67 years, 11,010 ft'/s (311.8 m'/s) 7,977 acre-ft/yr (9,840 hm'/yr).
EXTRES FOR PERIOD OF RECORD.--Maximum discharge, 47,300 ft'/s (1,340 m'/s) June 22, 1918, gage height, 13.95 ft
(4.252 m), site and datum then in use; minimum recorded, 3,900 ft'/s (110 m'/s) Julv 9, 1949, gage height,
2.53 ft (0.771 ml; minimum daily, 5,000 ft'/s (142 m'/s) July 2,6,1979.
EXT~S FOR CURRENT YEAR.--M ximum dischar e 29 000 ft' s m'/s) June 5, gage height, 10.95 ft (3.338 m);minimum, 5,580 s) Ju y 16, gage height, 2.92 ft (0.890 m).
Rating table (gage height, in feet, and discharge, in cubic feet per second)
(Shifting-control method used Jan. 20 to May 29)
2.94.06.0
5520
859014300
8.011.0 20200
29200
OISCHARGE.IN CUHIC FEEl PER SECOND. WATFR YEAR OCTOBER 1979 TO SEPTEMBER 1980MEAN VALUES
OAY OCT NOV DEC JAN FEf3 'lAR APR MAY JUN JUL AUG SEP
1 8060 8910 8140 8480 7220 8430 7550 9220 22400 6180 6270 71602823089608310"610 1130 11430 7530 13100 23700 6520 6350 727038170891084507970722071'60 H60 13000 24400 6550 6270 6880481709930876078607380786078901100026200618061601210581209250803078307020711607950843027600638063008000
6 8170 919ú 8230 8450 7380 8030 8200,9500 27400 6380 6380 721078340910011650771107530851012700996028200655063007190882009080811079507610862013ÓOO93002800078906410113098280902086807690817085701150085102740067106320155010831082007113078308480882y13800953027100641063208370
11 8280 7410 7240 8ó20 7690 8200 13700 9840 2ó400 6100 6320 998012800076408230&450 7050 8230 12800 11900 23000 5910 621,0 973013809085708590848073001103012000130002020057106160101,0014803088808ó50837071ÓO73110113001510016600569061309900157810820079701190074407500114001700015900569060109250
16 8310 8280 7920 13000 7470 7720 11600 17100 14900 5690 6020 1020017857087407890122007190&570 12200 17300 12300 5770 6160 98101885108f-50 8000 10500 6930 7530 9840 17800 11200 5650 6210 998019896060ÓO6590102001040073609900ló40013000574064909210209011064308570967010200800079501450011400574069909500
21 8960 8650 8570 7670 10200 6930 7220 14000 11300 5170 6910 9420221000082808540"'480 10200 8820 82ÓO 13900 10300 5770 6770 9560239"'10 8430 7830 11540 9670 8140 8450 13000 8430 5740 6630 9HO2493308880628084508930840082001280095605740680093302594208880841108400620084508260148008590580067109960
26 9100 8880 7610 11430 114nO 8590 8370 18900 7950 5820 6710 930027896089907780114007&90 8310 8030 19300 7410 5960 6660 95002889ÓO8570845017110795079708260221,00 6770 6070 6550 85402989908"'50 8060 7550 8430 7190 7950 22500 6490 6270 6440 786030905064007500&200 7810 7890 23900 6600 6""0 61,10 811,03189906170828077502220063506600
TOTAL 267260 260420 254910 271020 235710 2S1930 291460 41,9190 510700 189370 199060 263140MEAN86218&81 tl223 6743 8128 S127 9715 14490 17020 6109 6421 8771'!AX 10000 9930 6760 13000 10400 6930 13800 23900 ~fl?OO 7890 6990 101,00MIN781074107240755070207190716081,30 6490 5690 6020 6880AC-FT 530100 516500 505600 537600 467ÓOO 499700 ~78100 891000 1013000 375600 391,800 521900
CAL YR 1979 TOTAL 3639010 I4EAN 9970 MAX 221100 MIN 5000 AC-l'7218000WTR YR 1980 TOTAL 3444180 MEAN 9410 MAX 28200 MIN 5690 AC-l'6832000
" .ji a:r ) e-ý 11 g I .
SNAKE RIVER MAIN STEM 117
13172500 SNAKE RIVER NEAR MURPHY, ID--
LOCATION.--Lat 43°17'31", long 116°25'12", in NWltNEltSElt sec.35, T.1 S., R.1 W., Ada County, Hydrologic
unit 17050103, on right bank 4.2 mi (6.8 km) downstream from Swan Falls powerp1ant, 7.5 mi (12.1 km)
northeast of Murphy, and at mile 453.5 (729.7 km).
DRAINAGE AREA.--41,900 mi2 (108,500 km2), approximately.
WATER-DISCHARGE RECORDS
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
REVISED RECORDS.--WSP 1737: 1933(M).
GAGE.--Water-stage recorder. Datum of gage is 2,271.17 ft (692.253 m) National Geodetic Vertical Datum of
1929. Prior to Sept. 7, 1914, nonrecording gage, and Sept. 7, 1914, to Sept. 30, 1935, water-stage
recorder at site 3.5 mi (5.6 km) upstream at datum 9.79 ft (2.984 m) higher.
REMARKS.-- Records good. Major regulation by American Falls Reservoir 260.5 mi (419.1 km) upstream (see
sta 13076500). Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station
for irrigation of about 2,590,000 acres (1,050,000 hm21 of which about 701,000 acres (284,000 hm2) are bywithdrawals from ground water (1966 determination).
AVERAGE DISCHARGE.--68 years, 10,980 ft3/s (311.0 m3/s) 7,955,000 acre-ft/yr (9,810 hm3/yr).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 47,300 ft3/s (1,340 m3/s) June 22, 1918, gage height,
13.95 ft (4.252 m), site and datum then in usei minimum, 3,650 ft3/s (103 m3/s) July 7, 1981, gage
height, 2.22 ft (0.677 mIi minimum daily, 4,530 ft3/s (128 m3/s1 June 28, 1981.
EXTREMES FOR CURRENT YEAR.--Maximum discharge, 20,500 ft3/s (581 m3/s) June 16, gage height, 8.10 ft
(2.469 m)i minimum, 3,650 ft3/s (103 m3/s) July 7, gage height, 2.22 ft (0.677 m)l,minimum daily,'
4,530 ft3 Is (128 m3 Is) June 28.
u i SCl1A(lØE.IN CU.,lC FEE r PE" SlCONO.~ATE~YEAH DCTOHER 19110 TO SEPTEMIlER 1981
MEAN VALUES
OilY OCT NOV UEC JAN FEB '-AR APR 'lAY JUN JUL AUB SEP
1 11'+'+0 1I'l20 10'+00 10300 9090 '1" 70 9'[phone] '[phone]
2 11550 9090 10300 9860 9200 8920 10..00 10000 18000 '[phone]
3 827U 10900 10300 9!iI0 9320 84'+0 10'+00 7650 111200 '+61U 5800 6660
'+81SU H10U ll1UO \/\10 9290 7820 1u..00 7310 18300 '[phone]
5 7930 10..00 lU9UU "'d30 \i3¿0 6610 10300 6780 17900 5140 5880 7250
6 8210 12500 10900 1 U 1 00 91'0 7200 10300 5970 17500 5380 5690 6910
7 7960 11:;00 1l00~98;'0 d91l0 7250 111100 5550 16900 51'+0 5630 7930
8 1I0'+U 107UO 10bOO lU10U '.660 807u 1280U 5'+'+0 16800 5020 5610 75'+0
\I 7870 97'U 10500 9920 '11110 7650 9890 5'+0 16100 5190 5'+0 72'+0
10 7730 "950 9600 9090 8950 1111'+11 a\l50 5660 16500 5000 5610 7910
11 8130 llo90 9920 n20 87:0 h80'92(,0 5860 17700 5110 5770 8370
lC~7tl7U 81130 99'+U 91:30 7J10 7820 9930 6'[phone] 9030
13 7900 8b'+0 10000 98\10 .,970 87.10 8920 7080 19700 5690 5940 9080
1'+1l11l0 10'+00 10100 1300U "930 77bO 8tl60 5660 19500 5220 5580 9250
15 8070 9740 10100 119..0 85':0 7900 8690 5580 19500 5000 5610 8880
16 8150 9'+00 10'+00 \1920 b550 7170 8860 5550 19500 5380 5690 8760
17 \10&0 10100 10300 101100 il5:;U 79UO 1'80 5660 1'+00 5160 5860 8750
18 9320 96\10 10600 \1770 llS50 7930 7b70 6360 8950 5190 5810 8650
1 \I 9000 1 U 1 OU 11830 H2O tl6'tU 79&0 '(20 '6720 7730 5300 5820 7860
2U 90&0 9llJIl 9800 "'11 0 d'+JO '1&i!1l 776U 6520 666U 5300 5930 8180
ê:\160 10200 J 0000 10300 75110 84411 tl270 7650 &220 ''[phone]
22 9&90 11300 10400 9ó\l'1 liO 10 IHi:O 10100 7960 6080 5330 5870 84(,0
23 9bOO 11 100 10'+00 9170 '11:0 ob'+O 12100 7390 5970 5380 6070 8510
2'+9370 10.,00 1 U 1 00 "'1:60 7960 b3JO 12700 8070 5610 538U 6350 9110
25 9490 10900 1 u1UO 11'+00 1l0'+0 69"0 13000 7560 5610 5'[phone]
2&8950 10300 10900 111130 /l00 7&20 15600 70bO 5""0 5550 6260 8390
21 6119U 11..&0 ill'JO J 0 1 00 13'+0 7000 1'\100 7310 '[phone]~9520 10300 ..510 11830 75311 b270 1'300 9230 '+530 6'+0 6110 97110
29 9350 lL10U 10100 9370 101 UO 130UO 13200 ~"ä 5630 6160 9040
3U 9350 10"00 10000 8660 1000U 12100 141100 '[phone]
31 9350 102UO 8\11l0 9i:30 15600 5610 6730
TOTAL 26dflú 30508U 320060 305100 235220 2443"0 3J6150 23\1820 379'+00 16'+070 183370 249530
MEA.,8b61i 1017U 103i!U "',,'+2 ..401 7ea2 10540 '136 12650 5293 5915 8318
MIIX 11690 12"00 ll1UO 1080U \1320 10100 15bOO 15600 19700 6'+0 6730 9790
MIN 7730 86'+0 9570 IlbbO ,,9'0 bno 7220 54'+0 '[phone]'+40 6660
AC-FT 533000 605100 &3'[phone]&6600 ,+tl,+bOO 627100 475700 '7 325400 363700 '+9'+900
CAL YR_lia 0 ToT ilL 35554'+u MEAN 971'+MIIX 21\200 MIN 5690 AC-FT 7052000
WTR YR 1981 TOTAL 3210tl50 MEAN 87111 MAX 1970U MIN 4530 AC-FT 63611000
)r¿tE j£iY I1Q!
SNAKE RIVER MAIN STEM
.
13172500 SNAKE RIVER NEAR MURPHY, 10
LOCATION.--Lat 43°17'31", long 116°25'12", in NW\NE\SE\ sec.35, T.1 S., R.1 W., Ada County, Hydrologic
Unit 17050103, on right bank 4.2 mi (6.8 km) downstream from Swan Falls powerp1ant, 7.5 mi (12.1 km)
northeast. of Murphy, and at mile 453.5 (729.7 km).
DRAINAGE AREA.--41, 900 mi 2 (108,500 km2), approximately.
PERIOD OF RECORD.--August to October 1912, August 1913 to current year.
REVISED RECORDS.--WSP 1737: 1933(M).
GAGE.--Water-stage recorder. Datum of gage, is 2,271.17 ft (692.253 m) National Geodetic Vertical Datum of
1929. Prior to Sept. 7, 1914, nonrecording gage, and Sept. 7, 1914, to Sept. 30, 1935, water-stage
recorder at site 3.5 mi (5.6 km) upstream at datum 9.79 ft (2.984 m) higher.
REMARKS.-- Records good. Major regulation by American Falls Reservoir 260.5 mi (419.1 km) upstream.
Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for irrigation
of about 2,590,000 acres (1,050,000 hm2j of which about 701,000 acres (284,000 hm2) are bywi thdrawa1s from ground water (1966 determination).
AVERAGE DISCHARGE.--69 years, ll.2.,Qfi;3/s (311.5 m3/s) 7,970,000 acre-ft/yr (9,830 hm3/yr).
EXTREMES FOR PERIOD OF RECORD.--Maximum dischüSe, 47,300 ft3/s, (1,340 m3/s) June 22, 1918, gage height,
13.95 ft (4.252 m), site and datum then in use: mi;.i:iJlu_~~,3~~5~gi....t3/s (103 m3/s) July 7, 1981, gage
height, 2.22 ft (0.677 m): minimum daily. 4.530 ftJ/s (128 m'/š) June 28,1981.
EXTREMES FOR CURRENT YEAR.--Maximum daily discharge, 25,900 ft3 Is (733 m3 Is) May 13: minimum, 4,910
ft3/s (139 m3/s) Jan. 12, gage height, 2.83 ft (0.863 m): minimum daily, 5,970 ft3/s (169 m3/s)
July 25.
DAY
TOTAL
MEAN
MAX
MIN
AC-FT
1
2
3
4
5
6
7
8
9
10
8610866086408690
9000
8720
90609720
9520
9520
10100
10300
10900
9260
10400
10100
972010300103009940
OCT
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1981,1° SEPTEMBER 1982
MEAN VALUESNOV DEC JAN FEB MAR APR MAY JUN JUL
276810
9227
9970
8920
549100
CAL YR 1981 TOTAL
WTR YR 1982 TOTAL
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
9660
994010000
10100
9540
10400
9800
9800
9720
94609150
299030
9646
10900
8610593100
9630
9430
94909260
9030
9320
90309170
8860
8810
8830
8890
10100
9170
8950
8580
9150
8640
8580
8410
9000
8920
8920
8920
8920
8980
8950
9170
9570
8950
8920
8950
9570
9030
8920
8980
900090009630
9970
9890
96309260
9490
9430
8750
9350
87009260
10200
1280011900
9970
9430
8720
7870
9290
9260
8980
8010
8410
285390
920612800
7870
566100
3178230
4504260
997082708150
90308920
773081008720
7960
8180
9060
8270
9150
8610
8610
9230
86908610
8640
8920
8890
9090
8720
8920
8980
8780
8240
9170
872088608380
269570
8696
9970
7730534700
MEAN 8707MEAN 12340
8350
7840
8410
8380
9090
8520
9350
8410
929010100
14000
19500
21900
16300
14600
1610018300189001520012000
120001150012000
333300
11900
21900
7840661100
MAX 19700
MAX 25900
8490
87509060
8610
8350
12500
13200
14000
14200
13000
12000
9770
10700
12700
13100
12500
13000
13200
13100
13000
13600
1370013000
12300
12000
11800
1160011000
10100
9100
9200
9770
14600
15800
1980020300
3976401283020300
9100788700
206002240022900
22900
23700
22800
2280023000
23000
21600
21400
22600
24200
23600
23600
25200
25400253002530024400
25600
24700
24400
24300
24100
24000
24000
23700
2300022900
70740023580
25600
206001403000
MIN 4530MIN 5970
714800
23060
25900
174001418000
AC-FT
AC-FT
23000230002300022900
22500
230002420024800
24200
25200
25500
2570025900
25300
24600
24400244002470024500
24500
24300
22900
23000
2260022300
21600
204001740017800
1820019000
18400 .203002120020900
20200
20000
19300
19100
18800
17000
14200
11200
9430
9060
7870
9570
9350
10000
9520
9600
1010010000935010600
9920
390610
13020
21200
7870
774800
63040008934000
10200
11500
15300
11900
13700
14500
14600
13100
13200
12800
8750
97709230
9170
8720
10800
8580
8150
8350
7030
6640706060106140
5970
6010
6190
6120,
6120
68306450
289170932815300
5970
573600
9090
8980
9350
8980
9520
ÀUG
6580
7130
6900
7060
6300'
7070
7470
7420
7670
7740
7500
7370
67607090
6960
7150
8280
9770"
6560
6950
6760
73708440.8440.
8390
8110
7900
83708790.9640.9570,¡
2375107662
9710
6300
471100
93
SEP
10100914089709300
9110
8850
89909210
9160
9670
9540
93409510
9740
111700
10700
10900107001070010600
10800
10800
10800
1070010700
10800
10800108001090011000
303030
10100
110008850601100
..J/~ j e-a-~r,Ç$
SNAKE RIVER MAIN STEM
.
13172500 SNAKE RIVER NEAR MURPHY, ID
LOCATION.--Lat 43.17'31-, long 116°25'12-, in NW~NE~SE~ sec.35, T.1 S., R.1 W., Ada County, Hydrologic Unit
17050103, on right ban 4.2 .i downstream from Swan Falls powerp1ant, 7.5 mi northeast of Murphy, and at mile453.5.
DRAINAGB AR.--1,900 .i2, approximately.
PERIOD OF REORD.--Auust to October 1912, August 1913 to current year.
REISE! RECORD.--lP 1737: 1933(M).
GAGE.-~ater-stage recorder. Datum of gage is 2,271.17 ft National Geodetic Vertical Datum of 1929. Prior to
Sept. 7, 1914, noarecording gage, and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 mi
upstreaa at dab. 9.79 ft higher.
REMAR.-- Records excellent. Major regulation by American Falls Reservoir 260.5 mi upstream. Diurnal fluctu-
ation caused by hydroelectric plants upstream. Diversions above station for irrigation of about 2,590,000
acres of which abot 701,000 acres are by withdrawals from ground water (1966 determination).
AVERAB DISCHB.--70 years, 11,080 ft3/s, 8,027,000 acre-ft/yr.
EXTREMES FOR PERIOD OF REORD.--Maximum discharge, 47,300 ft3/s June 22, 1918, gage height, 13.95 ft, site and
datum then in usei ainiaua, 3,650 ft3/s July 7, 1981, gage height, 2.22 fti minimum daily, 4,530 ft3/s
June 28, 1981.
EXTREMES FOR CORRMT YEAR.--Maximum discharge, 32,400 ft3/s May 6, gage height, 12.06 fti minimum, 5,850 ft3/s
July 24, 25, gage height, 3.02 fti minimum daily, 6,360 ft3/s July 27,
Rating table (gage height, in feet, and discharge, in cubic feet per second)
DAY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1617
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
MEAN
MAX
MINAC-FT
3.23.54.0
6350
7190
8600
6.09.012.0
1440023200
32200
DISCHAB, IN COBIC FEET PER SECOND, WATER YEAR OCTOBER 1982 TO SEPTEMBER 1983
MEAN VALOESoc NO DEC JAN FEB MAR APR MAY JUN JUL
1200012000118001130011500
1130011300112001140011500
1320011800132001260010500
1210016100160001590015700
14800
162001620016200
16200
162001620016200
16400
1900018200
434200140101900010500861200
1820017700179001840018300
1880019600188001880018100
1880018200182001770018000
1810018400204002030020300
19900
19600
19900
19200
19000
1900019200188001830018300
564200
1881020400177001119000
1830019500193001780019800
1950019100
192001850018300
18400
18500185001860018900
1950019400195001950019300
1930019500
21300
19400
19800
18700
169001830017500
1840017900
586400
18920
21300
16900
1163000
18700
1880018800
18200
19400
1960019900
20500
20200
19600
19200
18200
18400
18800
18800
18400
1710016000
1700018400
183001820018400
1810017400
17500
17800
17200
17600
17300
17200
56900018350
20500
160001129000
17100
16700
16400
16000
16400
16800
16200
16100
15000
15500
16000
16000
16000
17200
18600
16900
16700
16100
15900
16000
1600015900160001600016000
16000
16000
16100
455600162701860015000903700
16000
16300
17400
18100
17200
16400
15500
15200
15200
14400
13700
13900
14200
15900
16400
16400
16200
13800
13200
12000
980010400108001110013200
137001620016800
1930018600
18200
46550015020193009800923300
19100
18400
17700
19500
19600
19700
20400
20400
20100
19100
19200
190001860017000
16600
15400
16800
17200
16600
16900
1720018000186001960019700
203002010021600
2300024300
5697001899024300154001130000
24100
25800
25400
25100
25600
30600
31200
30400
30500
30100
29100
29700
3080031000
29900
28900
28100
26700
25100
25300
25200244002330023300
23000
221002170021500221002220023100
815300
26300
31200
215001617000
22900
24900
24300
23300
23000
22900
22800
23300
23000
23200
23700
24200
2500025200
26200
26200
26700
26400
25900
23900
21500
187001910019300
18300
1610015500150001590016600
663000
22100
26700
15000
1315000
CAL YR 1982 TOAL 5280480 MEAN 14470 MAX 25900 MIN 5970 AC-FT 10470000
WTR YR 1983 TOAL 6103340 MEAN 16720 MAX 31200 MIN 636û AC-FT 12110000
17300
1800017200
18500
19900
20900
20100
17800
14800
14400
13100
1290012900
14800
16500
16100
16700
16200
15700
14100
12900
94807990
6600
7070
644063606610653068706530
411280
13270
20900
6360
815800
6610
7160
7450"
7540
7070
7100
8120
8080
7830
7930
8960
996090308470
9290
92408840
8450
8180
8370
8680
984010400
11400
10800
1100010900120009710
96709430
277510
8952
12000
6610
550400
AUG SEP
9150
9020
8990
8950
8980
9030
9340
10100
9520
8910
8930
90209230
9660
9680
9700909092909320
9240
10100
10600
10900
10900
10800
10800
10800107001050010400
2916509722
10900
8910
578500
SNAKE ~1VER MA1~ STE~217
13172500 SNAKE RIVER NEAR MURPHY, 10
LOCATION.--Lat 43"17'31", long 116'25'12", in NW1/4 NE1/4 SEliA ..~.35, T.l 5., R.l W., Ada Cou~ty, Hy~rolo;l~ Unit 17050101,
on right bank 4.2 .1 doinstr.a. from S.an Falls oo..rplant, 7.5 .i north.ast of Murphy, and at mil. 4~3.5.
ORAINAGE AREA.--41,900 .i2, appro.isat.iy.
PERIOO OF RECORO.--August to O~tob.r 1912, August 1913 to current year.
REviseo ReCOROS.--WSP 1737: 1933'04).
GAGE.--~at.r-stag. recorder. ~atu. of gage Is 2,271.17 ft National GeOdetic V.rtical O.tu~ of 1929. Prior to Sept. 7, 101.,
nonr.cordlng gaga, and Sept. 7,1914, to Sept. 30, 1935, .at.r-sta~e recorder at sits 3.5 mi upstream at ..tum 0.79 tthhher.
qe~ARKS.-. Records aood. M.jor reoul.tion by '..rican Falls Reservoir 260.5 mi upstr.... Oiur~al fluctuation C~US.O by
hydroelectric ølants uøstream. Diversions above station for irrication 01 about 2,590,OCO acrei 01 w"iCh soout 7:1,SJ0
.cres are by aithdra.als from ground ..t.r (1966 d.termination).
AVeUGE OISCHARGe.--71 y..rs'tt¡:I~t) f~;~:~'l 07,000 acre-ft/yr.
HHE"ES FOR peRIOO OF RECORO.--"aximu'¡-discharge, 47,300 tt3/s June 22, 1918, ~age hoi;ht, 13.95 ft, sito and onum tron .n
use; minimum, 3,650 ft3/s July 7, 19'1, gage h.ight, 2.22 ft; minimum .aily, 4,530 ft3/s June 25, 1031.
EXTREME S FOR CURRENT YEAR.--Maximum discharoii 35,300 tt3/s Jun.1 il,gage height,12.35 ft;~inimu:n,5, ~ce Hl/s ,iu~ .¿!. ,
9a~e h.ight,2.93 ft;minimum daily, 5,990 tt3/. Aug.2 j.
Pating table (gog.hoight,in f.et,and d i ,charge,in cubic:feet per second)
3.0 5eOO 8.C 2J2:;0
4.0 8600 10.0 26800
6.0 14400 12. J 35100
01 SCHUG;,IN CU3IC i=E: T PER SECOND,WATEP YEAR OCTOBER 1983 TO SEDTEH!eR 19~ 4
"eAN VALUeS
DAY OCT NOY O~C JAN FE'MAR APR "AT JUN JU~Ath;S!' ;,
1 11100 23700 20700 22700 23200 12200 2e500 ,'6CO 2geoo 100e;;131~0 ~ ~)
2 11000 22400 19700 22510 23200 12900 20400 27600 2! 1 00 1 a~oc 13500 00,)
3 11400 19700 18900 22200 23100 11600 21400 27700 2040'J 16900 14700 l~oJ
4 12300 17800 19300 22200 22700 11100 21400 29100 2eeOO 1620C 1 43~O 4,0
5 1300e 18000 19600 22700 21400 12100 21600 304eo 21400 14600 13300 ~'"J':
~12000 18200 17700 23600 20100 12300 21500 30900 25000 15700 13'00 1!"-'\..,...U,J...J
7 12S00 17400 H600 23400 19400 12300 2231)0 295eo 30200 15aoo 125eo ~.; 1 j
a 13200 18200 18700 23900 19100 11400 22400 29700 308eo 1 ~70C ;300 'i"!2::
0 13700 18200 20500 24700 17900 11300 22600 23100 32100 ' 145CC 8970 ¥ ~ 5;:
10 13500 19000 21500 24800 HOOO 13300 21300 28100 32600 lHca 8490 970;)
11 13400 20400 21500 24700 15500 13700 23400 Z6000 34 ~OO 1 !80e 77eo 913;)
12 14000 20100 22800 24700 13100 ~14600 25000 26700 34400 1280e 7no Q21 ::
13 16400 20200 22400 24500 14700 14300 26400 27400 34400 9620 7HO hlJ
14 16400 20300 22800 24200 13~00 11100 25000 28500 34000 920C'82~C Y7~t)
15 16400 20100 22500 24300 1c200 11500 26300 25ilOC 34000 92:0 ~OOO 10SC~
16 13900 20100 22000 23800 15400 13300 27200 30600 34600 ~BO '~11700
17 16100 20700 21900 21000 15400 13100 28200 33100 3510:7600 ~ HO 10jC\O
18 17100 22100 22100 22700 15500 14300 30100 34800 34900 722e ~~10700
19 17500 22500 23100 2~600 13400 13900 30500 34900 34S0'6940 9420 'l'HeO
20 18300 ZHOO 2H'0 22300 12700,13900 28100 34800 34600 624' -9510 9; ~ 0
21 19000 22800 22200 22100 10600 14400 26300 34700 32600 7300 9000 10600
22 19700 21000 21400 22100 10300 ..1.1800 23;)00 345eo 33300 taao 5600 H6C
23 20500 21400 18400 22100 11000 14200 23000 34500 32600 S40 5~90 1 :)2') J
24 20800 23100 18700 22100 12900 15700 22,00 34500 32200 10000 8460 1130,j
25 20800 22000 19600 22100 11200 15100 24500 34500 310')0 101ca !890 nz::.
, 26 23100 20700 20600 23500 12100 15100 30700 34500 3040C 1420 9400 104CJ
27 23200 21000 21200 23800 12200 13900 31900 34200 2770e 9200 1010e 1~900
26 24700 20900 21300 23200 12200 12900 32000 33200 22000 92%0280 12S0C
29 23600 21800 21400 23200 12300 17500 30aoo 33900 18800 9230 937C 11')00
30 23100 21500 22000 23200 20000 29900 32eeo 19ne 9740 940C 11')CO
31 23700 21800 23400 20400 311CO 11 eoo 9110
TOTAL 525400 615700 651700 720900 456800 430200 762600 968700 922400 35221e 302640 :!!JS~~v
"SAN 16950 20620 21020 23250 15750 13880 25420 31250 307511 11360 9763 10200
"AX 24700 23700 23800 24800 23200 20400 32000 34900 35100 19000 14700 13200
''l~11000 17400 17700 22100 10300 11100 20400 26700 1!800 6240 5990 73eo
AC-FT 1042000 1227000 1293000 1430000 906100 853300 1513000 1921000 1'30000 698600 600300 606yOJ
CAL YR 198~TOTAL 6314340,MEAN 17300 MAX 31200 MIN 6360 AC-cT12524000
WTq YR 1984 TOTAL 7018230 MEAN 19180 MAX 35100 MIN 5990 AC-FT13921000
Not.. --No gag..-helght recol"d :lee.10 to Jan.18, May 24,25,Au;.15.
W aL J-e /1 f. 131.72500SNAK RIVE MAIN STEM
SNA RIVE NEA MUPH, 10 .LOCTION.--Lat 43°17'31", long 116°25'12", in NWl/4 NEl/4 SEl/4 ..c.35, T.l S., R.l W., Ada Count.y, Hydroloiic Unit
~~~~~~03, on riiht. bank 4.2 mi dowst.r.am from Swan Falls pow.rplant., 7.5 mi north.aat. of Murphy, .nd at mil.
DRAINAGE AR. --41, 900 mi 2, approximat.ely.
PERIOD OF RE.--August. to October 1912, August 1913 to current year.
REISED REORS.--WSP 1737: 1933(M).
GAGE.--Wat.r-stag. r.corder. Datum of gaie ia 2,271.17 ft aby. National G.odetic Vertic.l D.tum of 1929. Prior
to Sept.. 7, 1914, noo.cording iage, and Sept. 7, 1914, to S.pt. 30, 1935, wet.r-stage record.r at site 3.5
mi upst.ream at dat.um 9.79 ft. hiiher.
RE. -- Estimated daily discharies: June 18-21. Racords iood. Major regulat.ion by American Falla R.s.rvoir260.5 mi upstr.am. Diurnal fluctuation caused by hydro.l.ct.ric plants upstr.am. DiY.rsiona aboy. station forirriiation of about 2,590,000 acrea of which about 701,000 acrea ar. by withdrawals from ground wat.r (1966
determination) .
AVEGE DISCHAE. --72 yeara, 11,240 ft 3/., 8,143,000 acr.-ft./yr.
EXTRS FO PEIOD OF RERD.--Maximu diacharg., 47,300 ft3/s Jun. 22, 1918, gage height, 13.95 ft, sit. anddat.um then in use; minimu, 3,650 ft3/s July 7, 1981, gag. h.ight, 2.22 ft; minimu daily, 4,530 ft.3/s June
28, 1981.
EXTRES FOR CUNT YE.--M.ximu discharge, 23.900 ft3£l Oct 25, iai. height, 9.18 ft; minimu, 4,540 ft3/s
June 23, iai. height, 2.65 ft; minimu daily, 4,940 ft Is Jun. 24.
DAY
1
2
3
4
5
12000
12100
11500
10900
11300
Rating table (iaie height, in fe.t, and dischari., in cubic feet p.r a.cond)
2.74.0 4670
8250
6.0
8.0
10.0
14000
20000
28700
DISCHAGE, IN CUBIC FEET PE SECOND, WATE YE OCOBER 1984 TO SEPTEMER 1985
ME VALUES
OCT
22900
22300
21900
21700
20800
20300
21400
20900
20900
20900
20900
20900
21600
20800
21000
21200
21100
21200
21100
21000
21000
21500
21600
21700
21700
21900
20900
21100
22400
22400
641000
21370
22900
20300
1371000
NOV
22800
22300
21500
21700
19500
18700
19500
19300
18700
15000
13300
14500
14400
14400
14300
12500
9960
12700
11700
12800
11400
13400
15200
15300
15500
17500
20300
17800
18000
19300
19300
512560
16530
22800
99110
10 i 7000
CAL YR 190A TOTAL OOA0200
WT YR 1985 TOTAL 5253000
6
7
8 ,;
9
10
13100
15900
16000
15900
15900
11
12
13
14
15
15900
16000
17400
18200
19200
16
17
18
19
20
19500
21100
22300
22000
21800
21
22
23
24
25
22300
22200
22300
21300
23000
26
27
28
29
30
31
21500
22600
22200
22100
22200
22600
TOTALME
MA
MIN
lIC'I'T
572300
18460
23000
10900
ii:i~OOO
DEC
19300
19300
18800
18700
17500
17500
18500
18400
18600
19000
18700
18600
18700
18500
18500
18600
18800
19300
19000
19000
19000
19000
,19300
19400
18900
17800
17500
17800
19400
19100
19200
579700
18700
19400
17500
11~0000
H1AN
MEAN
JAN
19200
19000
18200
18400
19400
19800
19500
19400
18800
17100
17000
17000
17100
17100
16900
17100
17100
16800
16800
16500
16500
17000
17300
18500
16600
16700
16200
15700
492700
17600
19800
15700
innoo
18980
14390
FEB
15700
14400
14000
14900
13100
12500
11500
11900
12200
11900
12300
13900
15700
16500
17300
17600
11800
18100
14700
13100
13800
15700
15800
15800
15900
15900
17200
18700
20100
19600
19100
476700
15380
20100
11500
114 ~~OO
MA
MA
MA
20200
22400
22000
22500
21700
22800
22900
22100
22000
23100
21700
20800
21100
20200
21600
21700
20400
20300
19500
19500
18600
18600
18700
18100
16100
17000
16900
15800
15400
14200
597900
19930
23100
1UOO
llAliOOO
35100
23100
AP
13600
11400
9510
8880
8580
9400
10300
11200
11300
11300
13300
18300
20400
20400
19800
20000
20900
18200
15800
15300
14100
14200
12300
10300
8080
7260
7630
8470
8480
9470
10300
398460
12850
20900
72110
7110300
MIN
MIN
MAY
12200
15500
15600
14600
14300
13000
9750
7460
7590
7100
244000
8133
15600
41140
4A4000
5990
4940
JUN
5490
5560
5510
5710
5550
6590
6150
6070
5800
6910
7340
8150
7150
9130
8500
7030
6360
5600
5780
6830
6280
6530
7880
5800
5600
6720
6050
6610
6400
6160
5310
5750
5160
4940
5050
6810
6650
6930
6980
6950
5420
6390
5610
5400
5510
6860
7610
7480
7010
7690
6700
200550
6469
7690
5490
307000
AC-FT13782000
AC-FT10419000
JU
229410
7400
83AO
11130
4~~000
AUG SEP
1560
8110
7910
8000
7680
8360
8860
8860
9560
8480
6690
6990
7530
7060
6700
8790
9110
10300
11300
11300
6130
7160
7790
7400
6290
12000
11700
11500
11100
10900
6200
7430
7370
7600
7650
10800.
10900
11200
10600
10200
7900
7380
7530
7510
7580
10300
10500
10500
10400
9770
7580
8220
7960
8340
7000
7160
10200
10300
10200
9750
9980
307720
10260
12000
83110
1110400
289
W2~/ J. I~!~VE~INSTFM
13172500 SHA RIVE NEA MURPHY, ID .311
LOCATION.--Lat. ~3.17'31", lonS 116.25'12", in HW\NE\SE\ aec.35, T.l 5., R.l W., Ada Count.y, HydroloSic Unit
17050103, on riSht. ban 4.2 mi downatream from Swan Falla poerplant, 7.5 mi nort.haast. of Murphy, and at. mila453.5.
DRAINAGE AR.--41,900 mi2, approximataly.
pERIOD OF RECORD.--Ausust t.o Octobar 1912, Ausuat 1913 to current. yaar.
REISED RES.--WSp 1737: 1933(1').
GAE.--Wat.r-stase recorder. Datum of sasa is 2,271.17 ft abova National G.odetic Vartical Dat.um of 1929. Prior
t.o Sapt. 7, 1914, nonr.cordins sase, and Sept. 7, 1914, to Sept. 30, 1935, wat.r-stasa r.cordar at sita 3.5
mi upstr.am at datum 9.79 ft hish.r.
RE.-- Estimat.d d.ily dischars.s: Jan. 1 to Fab. 26. Recorda iood. Major raiulation by American FallsRaa.rvir, 260.5 mi upst.raam. Diurnal fluctustion caus.d by hydroal.ctric plants upst.raam. Divaraions abov.
st.ation for irriiation of about 2,590,000 acr.a, of which about 701,000 acres ara irrisatad by withdrawals from
sround wat.r (1966 d.t.rmin.tion).
AVEE DISCHAE.--73 years, 11,300 ft3/a, 8,187,000 .cr.-ft/yr.
EXTRS FO PEIOD OF RE.--Maximu discharie, 47,300 ft3/a Jun. 22, 1918, ias. h.iiht, 13.95 ft, aita and
datum th.n in usa; minimum, 3,650 ft3/a July 7, 1981, sas. h.iSht, 2.22 ft; minimum daily, 4,530 ft3/s Juna
28, 1981.
EXTRS FOR CURNT YEA.--Maximu daily discharia. 33.700 ft3/a Feb. 21; minimu, 4,750 ft3/s July 18, sasa
haisht, 2.73 ft;! minimu daily, 6,180 ftS/a July 18.
DAY
1
2
3
4
5
10500
10300
10000
9920
9560
Ratini tabl. (iase hèisht, in feet, and discharge, in cubic feet per second)
3.0
4.0
6.0
5480
8250
14000
8.0
10.0
12.0
20000
26700
34000
DISCHAGE, IN CUBICttT PER SECOND, WATER YE OCTOBER 1985 TO SEPTEMER 1986
ME VALUES
OCT
10100
10400
10300
10300
10400
12200
11600
11400
10900
10800
11300
10600
11100
12300
9630
10400
14500
13500
12700
12600
10800
11400
12000
11600
11100
11900
12300
12100
12800
16000
3411030
11630
18000
9630
892300
NOV
15500
15900
15800
15000
12800
12700
9580
8930
11500
11800
11200
10300
10700
9840
10600
12300
13700
12600
10900
11200
12300
11600
12000
12600
11600
12000
13300
14000
12900
13200
13500
38111:10
12310
15900
8930
757000
CA YR 1985 TOTAL 4573230WT YR 1988 TOTAL 5891310
6
7
8
9
10
9380
9700
9800
10300
10000
11
12
13
14
15
10000
10500
10100
10000
10200
16
17
18
19
20
11200
11100
10700
10100
10200
21
22
23
24
25
10200
9950
10000
10000
10200
26
27
28
29
30
31
10500
10700
10400
10300
9880
11720
TOTALME
MA
MIN
AC-FT
315410
10170
11200
9380
8251100
DEC
13000
13400
12700
12100
12400
12500
12200
12600
12500
12200
12100
11900
11900
12000
12200
14000
14300
15000
14100
13600
14100
13500
12400
12100
12900
12800
12700
12900
12500
13900
1,5000
401:100
12950
15000
11900
798400
MEME
JAN
15500
15000
14000
13500
13200
12200
12000
11800
11900
10500
12700
12500
13200
15000
16000
18000
20500
25500
29000
33500
33700
24700
20500
23500
25800
22000
20800
20600
517100
18470
33700
10500
1028000
12530
15590
FEl
20000
20100
20500
19500
18700
19700
19900
20400
24600
28300
27600
27400
27700
28200
28500
28300
24000
20400
16100
15700
15700
20600
27800
29700
30000
29600
30000
29600
30100
30000
30600
7511300
24490
30600
15700
15015000
MA
28300
30800
31100
30500
30400
30200
29600
29800
25700
22900
21900
23400
24000
23000
24900
26600
26800
26400
26900
27000
25800
26000
26000
23100
21100
24300
23700
23400
25200
25200
784000
26130
31100
21100
1555000
MA
MA
23100
33700
APR
23800
24200
23900
24800
24000
24100
25300
24600
27000
27200
27500
28300
27500
27700
27100
25900
26900
26500
26300
26100
25900
23400
21200
20000
21400
23000
23300
23300
23500
22000
22700
768400
24790
28300
20000
1524000
MIN
MIN
~Y
21800
20600
20700
21000
19900
19500
21100
20800
22200
22600
24000
24600
24800
23000
23500
23700
24900
24000
22500
21700
21900
21900
21900
22100
21300
17900
15600
13300
11100
10300
1I24200
20610
24900
10300
1238000
49~0
6180
JUN
8870
9080
7760
8420
8620
8500
9130
9150
8780
7880
6840
6950
6770
6660
7150
7440
7580
6180
6840
6750
6950
7500
7810
7950
7570
7770
235890
7603
9150
15180
4157500
JU
7390
6590
7040
7080
6690
237100
7648
8800
6490
470300
AC-FT 9071000
AC-FT 11289000
AUG SEP
6490
6510
6610
7200
7190
8770
8910
9340
9020
9130
7380
7220
7360
7610
7390
9100
9130
9480
9870
9620
7270
7420
7650
6860
7320
9910
9850
10600
10300
10100
7690
7290
8190
7370
8210
10100
10600
10500
10400
10200
8610
8800
8460
7480
7790
10400
10700
11100
11000
10900
8540
8570
8220
8230
8330
78~0
12800
12100
13700
14500
15800
317930
10600
15800
8770
630600
298 yY~j~/187
SNAKE RIVER MAIN STEM
13172500 SNAKE RIVER NEAR MURPHY, 10
LOCATION.-Lat 43°17'31", long 116°25'12", in NW"/. NE "1. SE "1. sec.35, T.1 S., R.1 W., Ada County, Hydrologic
Unit 17050103, on right bank 4.2 mi downstream from Swan Falls powerplant, 7.5 mi northeast of Murphy, and
at mile 453.5.
DRAINAGE AREA.-41,900 mP, approximately.
PERIOD OF RECORD.~August to October 1912, AUgust 1913 to current year.
REVISED RECORDS .-WSP 1731: 1933 (M) .
GAGE.-Water-stage recorder. Datum of gage is 2,271.11 ft above National Geodetic Vertical Datum of 1929. Prior
to Sept. 7, 1914, nonrecording gage, and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5
mi upstream at datum 9.79 ft higher.
REMARKS.-No estimated daily discharges. Records good. Major regulation by American Falls Reservoir, 260.5 miupstream. Diurnal fluctuation caused by hydroelectric plants upstream. Diversions above station for
irrigation of about 2,590,000 acres, of which about 701,000 acres are irrigated by withdrawals from ground
water (1966 determination).
AVERAGE DISCHARGE.-74 years,11,290 ft'/s,8,180,000 acre-ft/yr.
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge,47,300 ft 'Is June 22,1918,gage height,13.95 ft,site
and datum then in use;minimum,3,650 ft'/s July 7,1981,gage height,2.22 ft;minimum daily,4,530
ft!/s June 28,1981.
EXTREES FOR CURRENT YEAR.-Maximum discharge,21,200 ft'/s Oct.31,gage height,8.40 ft;minimum,4,920
ft!/s Mar.23,gage height,2.79 ft; minimum daily,5,360 ft'/s June 2¡.
Rating table (gage height,in feet,and discharge,in cubic feet per second)
2.5 4140 6.0 14000
3.0 5480 8.0 20000
4.0 8250 10.0 26700
DISCHAGE,IN CUBIC FEET PER SECOND, WATER YEA OCTOBER 1986 TO SEPTEMER 1987
ME VALUES
DAY OCT NOV DEC JAN FEB MA APR MAY JUN JUL AUG SEP
1 14700 20600 18600 17800 10000 8910 11900 8070 7270 5420 6040 8010
2 15700 19000 17400 17600 10000 8760 9510 7900 7430 5380 8200 7730
3 15900 17300 18600 18300 12000 9290 9630 8330 6180 6410 6680 7540
4 16400 15300 18400 18800 9700 8140 7260 7450 7460 6770 6330 8010
5 17500 14000 18500 17900 10300 7600 8030 7280 6350 5960 6960 7640
6 16900 9900 19000 17600 12300 10700 7420 7440 6830 5610 6330 7840
7 17300 9840 18300 17800 12800 9560 6990 6480 6450 6260 6830 8100
8 17100 10400 17800 18000 12900 8120 7920 6540 6830 6640 6330 8740
9 17100 13500 17400 18000 13000 8230 7490 5960 8360 5610 6420 8330
10 17000 16100 17900 18100 11300 8850 7650 5970 7070 6250 7100 8370
11 17400 15900 18000 17900 8700 9940 7740 6620 6780 6440 7190 8340
12 17900 15900 18000 17500 7920 9810 9230 5940 8130 7340 7050 8530
13 18800 17000 18000 16900 7690 7930 8980 6340 7090 6590 6600 8270
14 18400 16600 18400 18100 6740 7360 9920 6040 7220 7720 6880 8190
15 17800 16700 18400 17800 8060 10200 9940 6330 5930 6790 7300 8200
16 17900 16600 18600 17100 8620 8870 8890 6210 5940 6640 6990 8330
17 18000 16400 18000 16800 8900 9460 7370 6110 5730 6350 7340 8280
18 18500 16300 17900 15000 9510 8270 7680 6490 5410 7100 7300 9060
19 18600 15800 18000 14700 9640 6270 7950 7760 6030 6740 7570 8460
20 18800 16000 18300 14400 9990 7820 6640 8160 5910 8660 6540 9100
21 19300 16200 18800 13300 9660 9530 8760 8200 6400 8470 7280 9130
22 18700 16600 19100 12900 8870 7710 8000 6380 5390 8460 6330 9210
23 18700 17100 18800 11400 9270 6180 6740 7670 5740 8270 6670 9030
24 18800 17700 18100 11900 9550 7570 7090 7080 6670 7910 7360 9120
25 19200 17900 18200 11600 9910 7310 7530 7040 5360 7140 6760 8930
26 19200 18900 18800 11700 8920 7720 7030 8060 5940 7360 6880 8780
27 19200 18300 18100 12100 9160 6930 7040 7510 5950 7310 6110 8760
28 19300 18200 18000 12100 9180 9230 6950 7710 5370 7250 6960 8760291930018900180001100010400718077306440592073108920301960019100181001130010400692076706440683081108880312070017700108008900737060408370
TOTAL 559700 488040 565200 476200 274590 265970 241380 219840 194100 211640 216120 254590
MEAN 18050 16270 18230 15360 9807 8580 8046 7092 6470 6827 6972 8486MA2070020600191001880013000107001190083308360866083709210
MIN 14700 9840 17400 10800 6740 6180 6640 5940 5360 5380 6040 7540
AC-FT 1110000 968000 1121000 944500 544600 527600 478800 436100 385000 419800 42$700 505000
CAL YR 1986 TOTAL 6258060 MEAN 17150 MA 33700 MIN 6180 AC-FT 12410000WTR YR 1987 TOTAL 3967370 ME 10870 MA 20700 MIN 5360 AC-FT 7869000
If f; f£~-I./jr~~'
SNAKE ~;~ER MAIN STEM
\I..e a :r"
13172500 SNAKE RIVER NEAR MURPHY, ID .305
LOATION.-Lat 43°17'31", long 116°25'12", in NW'/, NE'/, SE'l, sec.35, T.1 S., R.1 W., Ada County, Hydrologic Unit 17050103,
on right bank 4.2 mi downstream from Swan Falls powerp1ant, 7.5 mi northeast of Murphy, and at mile 453.5.
DRAINAGE ARE.-41,900 mi', approximately.
PERIOD OF RECORD.-August to October 1912, August 1913 to current 'year.
REVI SED RECORDS. -WSP 1737: 1933 (M) .
GAGE.-Water-stage recorder. Datum of gage is 2,271.17 ft above National ,Geodetic Vertical Datum of 1929.
7, 1914, nonrecording gage, and ,Sept. 7, 1914, to Sept.' 30, 1935, water-stage recorder at site 3.5
datum 9.79 ft higher. '
Prior to Sept.
mi upstream at
RES.-No estimated daily discharges. Records good. Major regulation by American Falls Reservoir, 260.5 mi upstream.
Diurnal fluctuation caused by hydroe1ectriê'p1ants upstream. Diversions above station for irrigation of about 2,590,000
acres, of which about 701,000 acres are irrigated by withdrawals from ground water (1966 determination).
AVERAGE DISCHAGE.-75 years, 11,240 ft'/s, 8,143,000 acre-ft/yr.
EXTREMS FOR PERIOD OF RECORD.-Maximum discharge, 47,300 ft'/s JUne 22, 1918, gage height, 13.95 ft, site and datum then in
use; minimum, 3,650 ft'/s July 7, 1981, gage height, 2.22 ft; minimum daily, 4,530 ft'/s June 28, 1981.
EXTRES FOR CURRENT YEAR.-Mximum discharge,.11,800 ft'/s Oct. 22, gaqe heiqht, 5.25 ft; minimum, 4,410 ft'/s Dec. 13, gage
height, 2.60 ft; minimum daily, 5,320 ft'/s June 23. 25.
Rating table (gage height, in feet, and discharge, in cubic feet per second)
DAY
6
7
8
9"
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
9790
11400
11400
10100
10200
2.5
3_0
4140
5480
4.0
6.0
8250
14000
OCT
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1987 TO SEPTEMBER 1988
MEAN VALUES
JUN
8870
9220
9210
9120
8950
9320
9120
8470
8800
8810
9210
8950
9190
9590
9300
9380
9460
9780
9780
9760
8320
8590
8680
9150
8450
NOV
9270
8990
9150
8560
9030
8350
8590
8720
9610
9240
9940
8800
7910
8880
8810
258990
8355
9900
5440
513700
DEC
8930
8340
9340
9820
9800
8480
6480
8500
9600
9440
9900
9820
7220
5440
7420
8650
7780
8720
8170
8550
8210
7570
7900
8290
8230
8090
8340
7720
8160
7850
8230
249380
8045
9150
7390
494600
JAN
7930
7900
8610
7820
8100
7910
7720
8010
8250
8290
7690
7390
9150
8290
8290
7740
8530
8030
7920
7730
8370
7530
8130
7760
8060
7890
7910
8010
8220
8220
7980
233890
8065
8660
7600
463900
FEB
8390
8660
7830
7600
7990
, 8420
8000
9030
7990
8150
MAR
8410
8290
7870
7760
6390
7900
8170
7350
6950
7690
7320
7480
7220
7220
7710
7160
8040
7910
7570
7260
7510
7120
6710
7680
8190
7220
223140
7438
8610
6550
442600
APR
6820
7080
6970
7170
7600
7670
6940
6760
7920
7850
7610
7230
7350
7520
7120
6990
7510
6910
8390
8030
8610
7580
7800
8100
7640
7210
7970
7280
6550
6960
210820
6801
8630
5500
418200
..:...:. YR 198' 1'C7AL .'n 7~r'CO MEA 8699 1"_loX :880C :i::~. 5,360 AC-'E: 6298000
NTR YR 1988 TOTAL 2769200 MEA 7566 MA 11400 MIN 5320 AC-FT 5493000
26
27
28
29
30
31
10200
9900
9710
9510
9970
9810
TOTAL
MEAN
MAX
MIN
AC-FT
296280
9557
11400
8470
587700
8480
8410
8760
8920
8430
8770
8160
9770
9590
8970
265300
8843
9940
7910
526200
8070
7950
7710
8010
8060
8320
8450
8410
8090
8640
7700
7850
8220
7730
7990
8070
8100
8080
8100
7640
7860
8230
8070
8070
237690
7667
9030
6390
471500
MAY
6070
7280
7010
7690
7140
6170
7110
8430
8360
6980
7500
7310
6830
6330
6070
6300
6330
7300
6910
6390
6820
6120
5860
6200
6330
6670
6280
5500
6200
6700
8630
192830
6428
8500
5320
382500
8030
8420
8500
7280
7700
7650
7130
6740
6770
6690
6170
6090
5910
5970
6410
6060
5920
6160
6030
5710
6090
5660
5320
5440
5320
5610
6310
5520
6240
5980
183400
5916
6380
5430
363800
JUL
5990
5980
5900
6000
6050
5590
6000
6010
5960
6040
5830
5430
6380
5950
5790
5870
6120
5990
5860
6000
5500
5780
6010
5930
5690
6070
5880
6160
6180
6010
5450
195670
6312
7100
5570
388100
AUG SEP
5750
6290
5570
6280
6070
6750
6760
6830
7510
7150
6040
5830
6770
6020
6140
7110
6750
6850
7400
7000
6230
6420
6220
6110
6120
6860
7030
7880
7890
6910
6200
6740
6620
5960
6370
7470
6740
7340
7330
7370
6160
6320
6540
6960
6610
7620
8230
7920
8610
8360
7040
6030
6970
6110
7100
6080
7530
7520
7480
7630
7980
221810
7394
8610
6740
440000
322 /Clte¡JVa/~/~~
SNAE RIVER MAIN STEM
13172500 SNAK RIER NE MURPHY, ID
LOTION.-Lat 43°17'31", long 116°25'12", in NW'/. NE'/. SE'l. sec.35, T.1 5., R.1 W., Ada County, Hydrologic Unit,17050103,
on right bank 4.2 mi downstream from Swan Falls powerp1ant, 7.5 mi northeast of Murphy, and at mile 453.5.
DRAINAGE AR.-41,900 mil, approximatê1y.
PERIOD OF RECORD.-August to October 1912, August 1913 to current year.
REISED RECORDS.-WSP 1737: 1933 (M) .
GAGE.-Water-stage recorder. Datum of gage is 2,271.17 ft above National Geodetic Vertical Datum of 1929. Prior to Sept.
7, 1914, nonrecording gage, and Sept. 7, 1914, to Sept. 30, 1935, water-stage recorder at site 3.5 mi upstream at
datum 9.79 ft higher.
RES.-No estimated daily discharges. Records good. Station equipment includes satellite telemtry. Major .,egu1ation
by American Falls Reservoir, 260.5 mi upstream. Diurnal fluctuation caused by hydroelectric plants upstream. (Diversions
above station for irrigation of a~t 2,590,000 acres, of which about 701,000 acres are irrigated by withdrawals from
ground water (1966 determnation) . ~
AVERAGE DISCHAGE.-76 years. 11,200 ft'/s, 8,114,000 acre-ft/yr.
EXTRES FOR PERIOD OF RECORD.-Mximum discharge, 47,300 ft'/s June 22, 1918, gage height, 13.95 ft, site and datum then in
use; ml_~1"'11"".3,650 ft'/s July 7,1981, gage height,2.22 It; minimum daily,4,530 ft'/s June 28,1991.
EXTRES FOR CURREN YEA.-Mximum dischrge, 16,100 ft'/s Mar.11, gage height, 6.77 ft; minimum,S, 160 It'/s May 23,gageheight,2.85 It; minimum daily,S, 710 ft'/s July 9..
Rating table (gage height,in feet, and discharge,in cubic feet per seCOnd)
(Shifting-control method used June 5 to Aug. 23)
3.0 5480 5.0 11100
4.0 8250 6.0 14000
7.0 17000
DISCHAGE, CUBIC FEET PER SECOND, WATER YEA OCTOBER 1'88 TO SEPTEMER 1'89
MEAN VALUES
DAY OCT NOV DEC JAN FEB MA APR HAY JON JUL AUG SEP
1 7600 8080 8160 7700 7680 9590 9320 6600 6970 -5980~6640 8130
2 7810 8310 8540 7460 7770 8770 8460 6620 7240 -5740.-6810 65003762081408420792087408810781071106770--850 ..7040 77204771087907850851075709880889070606470""930-6590 752057840886076007590846010300866063006700609066607660
6 7790 8730 8170 7870 7200 9460 7970 6740 6820 6660 6750 7500775108530785076106830869094106440767062606690916087490777084607560715010300830066107340622070208170977507800838072107100103001080069506930-5710 -7120 8000107830885082408120737011700826070706760- 5730-6530 7910
11 7590 8850 8250 8090 7770 15300 8800 7370 6280 .-820 -6660 8420127700885078207810771011400910081'0 6400 6100 7770 8210137890887080508120721012300971087106540634069007910147430890080007810652011500941082506650648075008820157230801080107770841010600852068506440630079508860
16 8000 8480 8080 7490 8230 8990 8920 7670 6310 6510 7840 842017805082308170736083409360935076806040716079108370187720850081107710821087909180824060506610639080801983008370754082708290847089607870639068906770802020811082007740788010500919089807770-5930-6850 7310 9240
21 8290 8040 8360 7510 11600 8730 8830 7910 6130 6100 7320 903022890083908030748010500832089207470651061507580895023822084407860754098607980843067106330637076508970
24 7510 8390 7890 7460 9200 8590 8790 6920 6160 6400 7490 8850
25 7860 9100 8320 8190 9580 9140 8860 6450 6280 6270 8780 8680
26 8230 9230 7400 7860 8890 8610 8580 6900 6650 6560 7790 8610277780886078607690949010500853064106880655073808830288440862087407590995097208010646073906200875084102988508030867075508930689068806060705091108970
30 8490 8160 7860 7390 9170 5830 6810 ..5960 ..6860 8680 86203182507730767096407110651081'0
TOTAL 245790 254380 250160 239790 236130 '303030 260480 222130 197050 1'6250 229570 250540
MEAN 7929 8479 8070 7735 8433 9775 8683 7165 6568 6331 7405 8351
-7
MA 8900 9230 8740 8510 11600 15300 10800 8710 7670 7160 9110 9240
MIN 7230 7770 7400 7210 6520 7980 5830 6300 5930 5710 6390 6500AC-FT 487500 504600 496200 475600 468400 601100 516700 440600 390800 389300 455400 496900
CAL YR 1988 TOTAL 2698960 MEAll 7374 MA 9230 MIN 5320 AC-FT 5353000
WTR YR 1989 TOTAL 2885300 MEAN 7905 MA 15300 MIN 5710 AC-FT 5723000