|
<br />7~..:,:,',
<br />~P<::."
<br />
<br />) l ... ~ '1
<br />
<br />.'. "~~'.'
<br />
<br />'"..;.;
<br />,. '~
<br />
<br />'.,.,..
<br />
<br />~'[Q"
<br />,.."..
<br />.<t~T.i
<br />
<br />MINIMUM REQUIRED RESERVOIR RELEASE
<br />
<br />~f
<br />
<br />'.....
<br />
<br />Minimum releases are required from some system facilities to satisfy
<br />prior water rights and fish and wildlife requirements.
<br />
<br />.. '.-
<br />
<br />.......
<br />.~:::.:;.
<br />
<br />'. ~ :. ..'
<br />
<br />.:.::.~~~~
<br />.--:.t.C
<br />
<br />Releases from Lake Granby to satisfy fish requirements were established
<br />by the Secretary of the Interior on January 19, 1961. A release from
<br />Lake Granby of 20 ft3/s is required from October through April of
<br />each year. During the remaining months of the year, the control point
<br />is almost 3 miles downstream from the dam. Although the seepage from
<br />Granby Dam and some inflow from tributaties enter this stretch of
<br />stream, there are also diversions for several irrigation ditches
<br />between Granby Dam and the control point. Except in years of sub-
<br />normal inflow, a flow of 75 ft3/s during the May-through-July period,
<br />40 ft3/s during August, and 20 ft3/s during September is required
<br />at this point. The flow during the May-through-September period can
<br />be reduced if forecasts indicate that the inflow during the water
<br />year to Shadow Mountain Lake, Grand Lake, and Lake Granby (less the
<br />decreed rights in the reach of the Colorado River between Granby Dam
<br />and the mouth of the Fraser River,) and the water capable of being
<br />pumped from Willow Creek Reservoir in that year is 230,000 acre-feet
<br />or less. The following reductions in fishery flow will apply on the
<br />basis of a forecast to be made by the Bureau of Reclamation, using
<br />information from all available sources, during the last week in ~pril:
<br />
<br />\?:~
<br />;}.(;:
<br />
<br />:~~~~~.'
<br />
<br />.4'~~::
<br />:':-.:..::
<br />~::';'.:. ,~
<br />;.:;~,;..}
<br />
<br />~.:./i~.
<br />.:j::.
<br />{>~:~
<br />
<br />~i~~1
<br />>:/\
<br /><<.:.~
<br />.}/-:.;..
<br />..'.......
<br />.. :,....
<br />:=;.:.:.jo:
<br />;('\.
<br />:,.,..:~'
<br />..~..- .'.~
<br />~,:'~;'K~
<br />;'.~~;;:?:-
<br />
<br />220,000
<br />210,000
<br />195,000
<br />Less than
<br />
<br />230,000
<br />220,000
<br />210,000
<br />195,000
<br />
<br />15
<br />20
<br />25
<br />30
<br />
<br />~<~~{:
<br />r~1~:~
<br />f~:;"~""
<br />~.:Y~-,..:
<br />~.~~:'(
<br />i{~:f:
<br />~/:?~.
<br />
<br />Forecas t inf low
<br />in acre-feet
<br />
<br />Percentage reduction
<br />in minimum release
<br />
<br />Willow Creek below Willow Creek Reservoir is not considered as a fishery
<br />resource since an irrigation ditch a short distance below the dam
<br />generally uses the entire flow in the late summer months. In the
<br />Secretarial Determination, no releases were provided to maintain Willow
<br />Creek as a live stream. However, a release of 7 ft3/s, or inflow,
<br />
<br />~~;~
<br />~~
<br />
<br />Adjustments will be made in the reductions, when appropriate, based
<br />on revised forecasts and consideration of actual flows during May,
<br />June, and July.
<br />
<br />,~..:::'-':'
<br />:':"':"..
<br />
<br />"~'~:: .
<br />
<br />.........
<br />
<br />-.". '."
<br />
<br />37
<br />
<br />:~?.;'....~......~...~.~:......'.'..~:~..'.~. ..:.. ' '. ... :,.r' . " '. '.. -.,'.' .... ..;:~.',~"',
<br />. :J::.<.._:. ~~.<: ~..~~..~:.,.:~..:.::...?:::;...',,:;,'-:-::.:: ~.~;: ~.
<br />;.:::::".,'.'.~. . . ,." ," . . ....:'. .' ' ~~:. '".:: :, :'.-.
<br />
<br />.; :.~.~.}~.:.:). '~.:~'>..': :- -;'.' i:
<br />
<br />. ,; ./,)" -' ~ .' :- ...::~~~;~:.:-:.~. ::..~ .-.
<br />~..... Co. ..' . .::. _.- ,... _. .
<br />
<br />"::,-:~~. .
<br />'....'. :"':.:: .;-..~:.:..
<br />
<br />, . . ~.. :', ~;- .:.?~.:~::~:~,-:~::~~q.:3..>Y':.:~?~;~.:::':'~;~:.'..::'.::"~';
<br />.. :.....-........ .:....
<br />.'
<br />
<br />,,:;:---~ . .;.
<br />
<br />""-'/',
<br />
<br />'J;
<br />
|