WSP03707

• File Number: 8141
• Description: Fryingpan-Arkansas Project
• State: CO
• Basin: Arkansas
• Water Division: 5
• Date: 3/7/1960
• Author: Acting Secretary of
• Title: Letter from Acting Secretary of the Interior transmitting a Report and Findings on Ruedi Dam and Reservoir Colo Pursuant to the Federal Reclamation Laws
• Water Supply Pro - Doc Type: Report/Study

107:1

-34

RUEDI DAAI AND HESERVOJR, COLO.

. A summar)' of the resen'oir opemtion study (Aug.19~9-:July 1948)
-in terms of uverag-e llnntutl quantities of water in ncre.feet follows.
for' the 19-ye:ll' period. . . . .
"' Alt.lI011O"h t.he ayerftge flTlTlual mllnlclpa.l and IT'I(lustrl1l..l w'atel' re-
lease frOl~ Hucdi Reser\"oir is 34,600 acre-ff~et~ examination of in-
di,'idual years (May through April) in the stufly discloses that in
years of low stream flows such as W;J1, 1934, and 1940, the I'e~!llred
releases would lie GG,OOO, 70,000, and 61,00U acre-feet, respectl\-ely,
nIl ha5ell upon 20]4 l'cquirelllents. Huedi Reservoir, therefore, would
provide suhstantia.l water supplies from storage in t.hose years of low
Slx~anl flows. ,
A,'erag-e llJllllIal releases to Hvoid spills and ndditionn.l winter water
represent, lUHlepelldahle yields as they w01lJtl not. lie il\'nilable ill
cri tical years.
'Vith respect. to releases for a.VOifla.llce of spi1]s~ it, \\'a~ aSS111l1ec1 t.lwt
by April 1 of each ye.ar H forecnst. of inflow nnd required releases
would he made for the ensuing spring and ~mmme-I' mont.hs. In case
any of the forecasts indieatcd that spills would oecur if only releases
for 1IIHIlllatury bypasses nnd municipal nlld industrial water reqllire-
111f'.nts were Il1ncle., t.hen addit.ional releases would be made in such a
mnnncl' ns to wake, t.he total rC'servoir outflow quite uniform und to.
enhance the operat.ion for flood oontrol. Such releases to Hyoid spills
mi,ght e.nhance fish floW's and he beneficial to power generation, if any,
ilnd po:::sibly for downst.ream irriga.t.ion use"

\-.

"

I~F'T.OW
Undcplctcd flow at lltledL_________________________________________
Less depletions:
Hn:'lk-lvnnbne dh"ersions______________________________ 4,400
Fryingpan-ArkansRs diversion3_________________________ ai, noo

A1~Crfl"tl
f1:n"'UlJl
f1C1'c-Jeet
171. 500'

62.300

DepIetro reservoIr Inflow _____________________________ ______~______ 100. 200
Less reservoir evnporntion_________________________________________ 800

Net resen-oir water supply__________________________________ 108,400

OUTFLOW

Down!-\t:r~am rights and F-ryingrmn.A.rl:i:ansas refl1acernenL___________
Fish flows:
Idenl refJuiremenL___________________________________ 5-1.100
Les~ Rucky Fork inflows______________________________ -8.100
Le!;s creditable olltfhnv for d(lWTIstrC'aIll ri::;hts llnd re-
plncement__________________________________ _______ -Ii, ;.00
Less IlRturnl streamflow shortngesL____________________ -5,200
Net ~sh reJeaseg_________________________________________~__
Additionlll relefl!':e!'1 for municipal nnn industrial -water ______________
nelea8P~ to n.oirl sJlill~____________________________________________
Undependable winter releases___ _____ _ ____ _ ____ _ ____________

20,000

1:23.300
34,600
22, GOO
i,900

Tow. 1 reservoir outflow _ __ _ __ __ __ _ ____ ___ ________ __ _______ ___
1 A,"ni\~b\(> [or dl>WDl>lrenm lli\1l11clp:Jl 8.Dd Industrial \H;E'.
Altholl/!,h the operation studv shows tha.t. there would be no releases
requin..'{) for municipal and in"dustria.l water during winter months,
some releases would be made in these mont.hs in some years in addition
to the manrlatory rel"'~ses explained pre\'iously. Siudies sho\\' that.
l'eser\'Oir content could be drawll down to 67,000 aCl'e-feet. by M:trch 31
in any year nnd that n.n mundatory and municipal ftll(l indust.rial water
l'elell.5e requirements could still be lllei during the ensuing yenr e.veIl'

108. 400,