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<br />/ <br /> <br />( <br /> <br />- ~... ~~ ( '" ;-:C\ I ' ~~.tV <br />t; l' -.u \,"'.:\ J.~ -, r.. L~~ ..1 ~ t'J <br />.r.;.....:::,;.--=-=r!'. ;..~~..1.. .~ r"'~ <br />t:;,J..~".~, ',~ P ,..l.,llij., I".. '~ <br />t,~ ~~ .:~ ~ f~ ~.4 l. i ;1 ~.~ '\ ~-. ~~ F1' ' <br />~ .' ~._ ,-.1". \'_, <br />t, :; \: I: .' r~ ".j f'l '';' ,. i1~: . <br />u .. ...~-""..:.-::.~ t..~ 1 ..a.. Q <br /> <br />e <br /> <br />Mr. Jesse <br />Ma;-c:, 10, 1980 <br />P2ge 11 <br /> <br />'\I]ml <br /> <br />ADD I TI O~lAL SUGGESTIONS <br /> <br />Three additional suggestions are also made to assist the State <br />Ensineer in determining or verifying the cause of a change in the flow <br /> <br />c:: Thatcher. <br /> <br />First, additional side channels could be gaged to improve <br /> <br />or ~evelop a bet~er method of estimating the 'total side channel inflow. <br /> <br />Second, former mainstem stream 9ages, such as the Alralfa, R-3ar and <br />Hcenne gages, could be rescrrected to aid in es::i~ati~; s::rec:~ 105~~S <br /> <br />or ~ains in various river reaches as well as to indicate continuity of <br /> <br />strea:T,flovJ through tile project area. Third, the project ditch diver- <br />sions cocld be plotted on a g;-aph sho\oJing the relatio<1ship-bet'?,een <br />~ive;-sions without the Project and the flow of the Purgatoire River at <br /> <br />Trtnicad. <br /> <br />This relationship is shown <br /> <br />..... ,... <br />on rlgcre ;) on <br /> <br />a<1 a;.r,ual basis <br /> <br />e <br /> <br />and on Figure 6 on a ten year running average basis, An examination <br />cf Figure 5 reveals :hat with riverflow values in excess of E~,OOO <br /> <br />acre-feet no apparent relation exists between historic diversions and <br /> <br />river flow on the Purgatoire River near Trinidad. Therefore, these <br />values over 85.000 acre-feet are excluded from the ten year average on <br /> <br />r <br />.igure o. <br /> <br />If diversions with the Project on a ten year running <br /> <br />average basis are greater than this established historic relationshi?, <br />this would indicate a potential expanded use of water in the Trinidad <br /> <br />?roject area. <br /> <br />If this event occurs, the other checks should be made <br /> <br />to verify the cause of the departure (natural caUSe or man-made cause). <br />Since the limitation in the decree r~quires more from the State <br />Engineer than normal administration of the water rights, we would <br />suggest that the State Engineer require the District to submit an <br />annual report to the Division Engineer. We contemolate that this report <br />would at least include an analysis using the methods described herein <br />so that the Division Engineer could make the determination required by <br />the decree. <br /> <br />e <br />