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<br />• <br />DO] PILM <br />00 S TAI C OFFICE <br />ALDER CREEK <br />1m5 ,l!!!_ 15 kN 10: 59 <br />1997 <br />Alder Creek is a small, first order stream tributary to San Luis Creek in the <br />northern section of the San Luis Valley. The Alder Creek watershed encompasses <br />the northeast side of Round Mountain, six miles southwest of Poncha Pass. The <br />stream is characterized by moderate gradient (8%), cobble and gravel substrate with <br />abundant woody debris and overhead cover. The purpose of the survey was to collect <br />information for a minimum stream flow report. The survey site was located at the <br />USFS/BLM boundary. Alder Creek is inhabited by a self-sustaining population of <br />brook trout (721b/acre biomass), which range in size from 2 to 8 inches in length. <br />The estimated density of 2275 fish/acre suggests that the population has reached <br />carrying capacity. Average size of brook trout has not changed since a previous <br />survey in 1980. Harvest by anglers is encouraged to suppress population growth and <br />increase average size of brook trout. Previously suggested as a potential restoration <br />site for Rio Grande cutthroat trout, although there is no natural barrier. More <br />investigation is needed to determine the potential for native fish restoration. <br />Management Recommendations: <br />1) Stocking: Naturally reproducing brook trout population, with no stocking <br />required at this time. <br />2) Regulations: Maintain standard methods, bag and possession limit for <br />trout. <br />3) Habitat improvement: Coordinate efforts with USFS and BLM to minimize <br />livestock grazing impacts on the riparian vegetation. <br />4) Access/Facilities: None recommended at this time. <br />5) Info rmation/Education: Advertise as an exceptional brook trout fishery.