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<br />JOB COMPLETION R~PORT
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<br />INVESTIGATIONS PROJECTS
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<br />State of:
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<br />.!iF;,lLME X I CO
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<br />PrOject Ko,: F.19-D-4
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<br />Na,ma: StRte.''''irlp.. ROI1f'h Fi~h Control
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<br />Job No.: C-16-4
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<br />Ti t Ie: R~hgbi 1 i ta t1 "" of tb" San ,Juan R~
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<br />.1ll,UJlJi.us:.tJ..Q.Il:
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<br />Tha San Juan River, located in the northwest corner of New MeKico, is a
<br />major tributary of the Colorado River. It originates in the rugged San Juan
<br />Mountains in Colorado, enters New Mex1co near Rosa, and flows approximatoly 90 miles
<br />through the sta,te before 1:e-entering Colora,do.
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<br />The Navajo, Piedra, Pine and AnimB.s Rivers are the ma.in tributaries of. the
<br />San Juan f{1ver. The Animas River was not inc1udeu in this project since it enters
<br />the Ss,n Juan River below the Na,vajo Dam.
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<br />As a result of ' the Upper Colorado River Storage program the Navajo 0,1.In wa,s
<br />proposed [or the San Juan River and 1s now under construction, approxima,tely 14
<br />miles nOl'theast of Blanco" New Mexico. The construction wi 11 be completed by Septeln-
<br />bel' 1962, howe,.rer, water impoundment,wl,ll start uuring the spring of 1962.
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<br />The purpose of this reha,billta.ti.on project Was to eliminate the present trash
<br />fish populations in the San Juan River and tributa,ries upstream from the dam site.
<br />Since th" waters impounded by the Navil.jo l),1ffi will extend into Colorado, both states
<br />cooporated with this project, This report will include only the New Mexico pOI.'tion
<br />o[ the proJec.t. Our pOl't10n of the rehabilitation project included 15 miles of the
<br />P,no River, 30 miles of the San Juan Rival', and approximately sil<: miles of the
<br />Navajo Rivnr, A total of ,51 miles o[ WB.te1:'S wa,s troateu.
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<br />When the project W,9s initia.ted, tho possibility existed of having neIJ,rly
<br />20,000 acre-Ceet of wa.ter impounded by the beginning of the rotenoning. This
<br />po~sibj,bil1ty could not be disregarded, thel'efo,'c, the initiaL planning included this
<br />volume of wa.ter a,S a part of the project.
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<br />-The 1:'eha,bilita,C1on project started September 7, 1961. There was no wa.ter im-
<br />pounded at this time, so one phasa of the project was eli"inated.
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<br />n:.clmi..Q\lllli:
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<br />Liquid NOKfish with five percent active rotenone ingredients was used, Stream
<br />[1m,s wer" determined and the amount of rotenone required \Jas calC,ulated.
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<br />1'11" rotenone was applied at three different points along both the San Juan and
<br />l'ine Rl.vers. The upper sta.tion on the Pin" River tJas located a.t the COIOl'ado-New
<br />V-exico at.teline near La, Boca., Colorado. Tho second and third stations were loca.ted
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<br />F-19-D-4, Job No. C-16-4
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