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<br />
<br />the dam during high runoff simply
<br />flows through the outlet at a steady,
<br />though unregulated rate,
<br />
<br />4. BUREAU OPERATION OF HERON
<br />RESERVOIR: The Bureau of Reclama-
<br />tion stores only imported San juan.
<br />Chama Project water in Heron reser~
<br />voir and releases it in accordance
<br />with requests from those who have
<br />contracted for its delivery. Water
<br />levels in the reservoir have generally
<br />been maintained at or near the
<br />400,000 af capacity since filling in
<br />1983. The Bureau is authorized to
<br />divert an average of 110,000 aflyr (not
<br />to exceed 135,000 af in anyone year)
<br />in order to replenish reservoir storage
<br />and to meet project requirements.
<br />
<br />The Bureau contracts provide that
<br />users must accept delivery of their
<br />water by December 31 of each year,
<br />Users are not entitled to carryover
<br />storage in Heron Reservoir; they
<br />therefore lose their right to water that
<br />is undelivered by the end of the year,
<br />even though they must still pay for it.
<br />This provision led to the situation
<br />where large flows from Heron were
<br />released in December, as buyers
<br />scrambled to find downstream stor-
<br />age space or a use for their water, and
<br />called for the water prior to the year
<br />end deadline.
<br />
<br />These extremely high December
<br />flows, followed by no SjC releases in
<br />the winter months when the natural
<br />Rio Chama flow is quite low, were
<br />frustrating to the U.S. Fish and Wild.
<br />life Service and others who wanted to
<br />see thriving fishe.ies on the Chama.
<br />Negotiations commenced and the
<br />Bureau, with the concurrence of SJC
<br />contractors, has on a year by year
<br />basis extended the December deliv-
<br />ery deadline into March and April to
<br />permit Heron releases for fish
<br />enhancement during the low flow
<br />winter months.
<br />
<br />The State of New Mexico, through its
<br />Interstate Stream Commission (ISC)
<br />and the State Engineer, is involved in
<br />the delivery of SjC water. The ISC
<br />acts as an intermediary between the
<br />Bureau and many of those who have
<br />contracted for SJC water, informing
<br />the Bureau when deliveries are
<br />
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<br />PriInai'y Owner:
<br />AUthorization:
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<br />Authorized Purposes:
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<br />Year COD1pleted:
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<br />Water $~pply Storage:
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<br />1otk.IS~orage ,CapaCity:
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<br />" 1:lp2 (P~ 87-483)' "f ,,'
<br />/,;Wate,r supply storage forSan Juan-Chama ProjeCt'
<br />1971
<br />400,000 af
<br />400,000 ai
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<br />'Herof;:Dam is the mairt s~ructurewhich Th~ Bureau of l~eclamati()n opeI~t~:s
<br />stotes water imported td'the Rio Grande Heron ~eservoir fr()J'tlI!sAibu.que;.que
<br />bas~hthr{)ugh the Sa~ JUan~S:hama,P~o- :;jdis,tri_ct o(fice. During tne'springa.ndearIy{
<br />ject:'Thereseryoll: is lOcated,on.,Willow sum.n"J~F.r,un?n, the Bureau divert~ ~~ter<
<br />Cr~ek ,l"?mediately upsrreamfrom its to Hero~ from'the San Juan.watershed via
<br />conflue~~'ce with the, Rio Chariia. Its e;"tire'" a series of tunnels Because o'f recent wt>t
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<br /><;apacitycif 400,000 a~ isd~,df~ated, to. stc.lr.~'~ yearS, the reservo-t! IS currentIyluU. Thea!
<br />ing'$JCwater~:and, I)_o:naturalJlows of.~Bure_au'annuaUy relea$~s under l00l0q0 af
<br />W,ill,ow Creek rfiayb~ impourided. {;,; "-fr9m HE;ronReservoir"to SJCcqntractors. ;
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<br />Primar)(Owner: Corps of E.Qgineers
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<br />Au:thorization: \; ~'1948FloodControIAct:
<br />Authorized;~;p~tes~~11~d'and:dirri'eriff'~~tf6,1 ~
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<br />Year Com. . plete'",d: " 19,;4., ~,.."'. "';"', '.' ";_ . '"
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<br />wa~~~,f_~Y'i;torage~ ,:~O", ::' ~~.' r_! ~~ ~ ,'>-\ ~
<br />To,ta(Stotage_~apacity;:~1".JQ,6,9-0Q~) ~ l\]~ ~ ~'1i ~"!
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<br />~ ~ ~~t:., ... '~~,~,;~1.\'~' ,:"S<>:q ~~""~ ..~~~~ ~ ~~ ~
<br />cqnst;u~it1}1pfJell)e~ Ca!l:yon Da:rI'\Y'as< d,esigned to hold up to 73,990 ,af of flood. ~~
<br />initiat~d~hortlY'aftei.jt~~wh,9Eiz~;1?p~t}:,:i vyaters and 3~pOO acre feet of sedim~t.
<br />194{ias.part~,~ comBrehen~l~,~do\l/~,,~_~lea~~s.,?(~aterfro~ ther~ervolt ,*
<br />con~:~Jpl~ f~r t~~~.tif'pe~ Riq)pra~.de~ ~ ~~:,~y tl1eC9~p~,<?f F:nginee,~s are J!rr,t~d in ~
<br />T~~.d~m~t,~l~~te~~~:n the.1e!p_~_l)j.ter.~, 'At c~,mjunctipn~itn, th~s)Jr:?~:5:ochi~ f$
<br />twb'md~supstr,eanlfrOl~ lts~onflu~nce':tg p-r~~ent majol;' flooding through. ~.
<br />with th~'>RioG.tande, The reservoir,Js!<r _1\lbtquerqtle~. ~ ;ii! ~ ~$1
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<br />~L1TQ~G?{RESERVOI~~ ,~
<br />
<br />Pi.ima'~x Owne'r'; it; B~.r~a~o~,'Re<c1amati~~Il
<br />Atithor~'atic)Jfi. ':1941 It\t~~.ior Approp~iation Act
<br />~'fl-" " i;:'.\tJ. ';{"" ";'_~"
<br />Auth9rized Put~ose!~i .:,W~ter~-QP_Bly;:fl()o.d co,n~~~ i\i ~ t~
<br />Year Completed: 1951( :~; 1,~ 4'~ ~
<br />'.'....::*:,::. fO: ,_ l)I1 :,:tii :"
<br />Water SUPl,ly Sil,ragg:'54,iJOO af !\
<br />Total Sto~~geCapadty: "'60,OOoaf ~, :; ~~ ~: ~ ,:~
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<br />Platoro[)amisthe onlyJederallY'fp~ded ir::igatqrS begttn paying f6r.the'-projEt~.t,
<br />reservoir proj~t in the,C()lorad~)'~rtio~;~" 'ihe'B'ureaJ'bfRe~iani~tion nor~i1Il;..':' ~
<br />ol tile,_:Ri~ :qra~de b~~in: ~t wa~con~ ~.~ n operates- tH~ d~ although' during fl~od..,
<br />struc,t~d pri~~o/'ilY-f?X_JJ,roy~di~g a$Ufh:il1 condltion$, the Corps of Engmeers
<br />,f~e~t:~~'W~~~~.~E sup~;~ :~_lfngat9;:OIl'; ~ "'a~sumes atithorit~~B&ause Cdlorildo'S Wd~~
<br />e. _~p,eJos:lverr,~l ,:;,' e secpnarr, ~~ebt,~nder the C()mpC\ct was elimimifed ~.'- ,;.
<br />purpose of fIood control. Dtle to restrlc~>it'~ : ."'1985'~, ,,-=,,6. ,,-. t"f""i"fu'C",,', PI 't' . ..'- ''i
<br />tiorls:impo's~dpY'theRicl"dra'naeCom<'.'.' '-In ..;;,,-i,..ne~iloPbll..?nSdtrh:~~lm~ ." '~{)-r:<?;'. ;~
<br />..". .... .>,.... ,'. .,..,,",,(io.<T','" ill arenowavil..a..e,an,' e.oca1conser.;, "-
<br />'Tact,:PIadtotO res~drv?1!_,haSrar7IYl &~~ ~(Jj ~,vansydistiict is'tons'i'dering'J~iifttha.Siri'g'
<br /><JP. e,atel<J.provl"ewat~rsuppy:to" "~lIith' ""'t' m ~ ''','' .~., ,
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