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iii iiiiiiiiiiiuiii ~ <br />Divisional Correspondence ONy <br />STATE OF COLORADO <br />DIVISION OF WILDLIFE <br />DEPARTMENT OF NATURAL RESOURCES <br />TO: John Woodling DATE: Ju17 28, 1993 <br />FROM: John Alves <br />RE: SLV fish investigations pertaining to mining operations <br />Enclosed are lake and stream surveys conducted in 1992 and 1993 on La Jara Creek, Terrace <br />Reservoir and Rito Seco Creek. These investigations were designed to monitor the influence <br />of mining operations at Summitville and Battle Mountain Gold Mine otl the fisheries of <br />these waters. <br />It appears that irrigation diversions from the Alamosa River to Ls Jara Creek near <br />Capulin, has impacted the fishery of La Jara Creek. Electrofishing surveys revealed fish <br />populations upstream of the diversions and well downstream of the diversions, however a <br />fishery is missing between these sites. <br />A gill net survey at Terrace Reservoir in 1990, following a reported sF:ill at Summitville <br />Mine, revealed that mining pollution had eliminated the trout fishery. The 1993 lake <br />survey report supports that analysis. <br />The Rito Sego Creek trout fishery, above and below the Battle Mountain Mine supports <br />adequate populations of brown and brook trout. There is evidence of si:.tation and erosion <br />created by road construction at the mine. <br />Electrofishing surveys are planned for the Alamosa River this fall. Flease provide maps <br />of the Wightman Fork tributary streams requested for surveys by the SI~A. I'll try to fit <br />this work into my schedule for August as requested. <br />cc: Langlois <br />Apker <br />Malmsbury <br />Albert <br />Rauch <br />Navo <br />Harry Posey (Minerals and Geology) <br />Andrew Archuleta (USFWS) <br />