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<br />. <br /> <br />. <br /> <br />e <br /> <br /> <br />~Y_.... <br /> <br />~~" <br /> <br />t. <br /> <br />-~--:-:...... <br /> <br />John Roach, Ph.D. <br />Aquatics Specialist <br />Colorado Water Project <br />1320 Pearl Street, Suite 320 <br />Boulder, CO 80302 <br />303.440.2937 <br /> <br />TROUT <br />UNLIMITED <br /> <br />February 21,2007 <br /> <br />Mr. Jeff Baessler ami Mr. Todd Doherty <br />Stream and Lake Protection Section <br />Colorado Water Conservation Board <br />1313 Sherman Street, Room 723 <br />Denver, Colorado 80203 <br /> <br />Re: Trout Unlimited Instream Flow Recommendations for Arapaho Creek. <br /> <br />Dear Mr. Baessler and Mr. Doherty, <br /> <br />Trout Unlimited in conjunction with the Colorado Division of Wildlife (CDOW) is <br />formally submitting this instream flow recommendation for Arapaho Creek, located in <br />Grand County, Water Division 5. <br /> <br />~ <br /> <br />Location and Land Status. Arapaho Creek originates at the outflow of Caribou Lake, <br />which sits at an elevation of 11,100 feet in a basin between North Arapaho Peak and <br />Satana Peak. It flows generally northwest through U.S. Forest Service dropping nearly <br />3,000 feet to its confluence with Buchanan Creek at 8,400 feet over a distance of <br />approximately 7.8 miles. From there the stream continues northwest through Monarch <br />Lake and on to Lake Granby. The proposed instream flow reach is between Caribou <br />Lake and Arapaho's confluence with Buchanan Creek. It is entirely on Forest Service <br />Land. <br /> <br />Biological Summary and R2CROSS Analysis. In July and September of 2006 TV and <br />CDOW collected stream cross sectional data, natural environment data, and other data <br />--. <br />needed to quantify Instream Flow needs. Fishing surveys indicated a healthy, apparently <br />self-sustaining population of brook trout in Arapaho Creek. <br /> <br />Stream cross sectional data were analyzed using the R2CROSS program, and the output <br />was evaluated using the methods described in Nehring (1979) and Espegren (1996). <br />Based on the results from the R2CROSS analysis ofthe cross section and the available <br />biological data Trout Unlimited and CDOW recommend that the CWCB appropriate the <br />following flow amounts to preserve the natural environment of Arapaho Creek to a <br />reasonable degree: <br />