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<br /> <br />. <br /> <br /> <br />STATE OF COLORADO <br /> <br /> <br />Bill Owens. Governor <br />DEPARTMENT OF NATURAL RESOURCES <br /> <br />DIVISION OF WILDLIFE <br /> <br />AN eQUAL OPPORTUNITY EMPLOYER <br /> <br />Bruce McCloskey, Director <br />6060 Broadway <br />Denver, Colorado 80216 <br />Telephone: (303) 297-1192 <br /> <br />December 1 S, 2004 <br /> <br />Mr. Dan Merriman and Mr. Todd Doherty <br />Colorado Water Conservation Board <br />Stream and Lake Protection Section <br />1313 Shennan Street, Room 723 <br />Denver, Colorado 80203 <br /> <br />Re: Colorado Division of Wildlife Instream Flow Recommendations for Anthracite Creek. <br /> <br />Dear Dan and Todd, <br /> <br />The purpose of this letter is to officially transmit the Colorado Division of Wildlife's Instream Flow <br />Recommendations for Anthracite Creek in Gunnison County. The reach of stream covered by this flow <br />recommendation is from the confluence of Ruby Anthracite Creek to the confluence with Coal Creek, a <br />distance of approximately 11 miles. <br /> <br />The Colorado Division of Wildlife (CDOW) collected stream cross section data in August 1980 and October <br />1985. In addition, in the fall of 1998. the CDOW, with the assistance of staff from the Colorado Water <br />Conservation Board (CWCS), collected stream cross section information, natural environment data. and <br />other data needed to quantify Instream Flow needs for the Anthracite Creek. Anthracite Creek is classified <br />as a river (between 60 to 99 feet wide) and fishery surveys indicate the stream environment of Anthracite <br />Creek supports a self-sustaining brown and rainbow trout fishery. Anthracite Creek also supports <br />populations of Mottled sculpins, Speckled dace and Bluehead suckers. <br /> <br />The stream cross section data was analyzed using the R2CROSS program. The R2CROSS output was <br />eva luated usi n9 the methods described in Nehring (1979) and Espegren (1996). The CDOW has reviewed <br />the data collected to date and based on that review recommends that the CWCS appropriated the following <br />flow amounts to preserve the natural environment of the Anthracite Creek to a reasonable degree: <br /> <br />. 54 cubic feet per second is recommended for April 1 through July 14. This flow is required to <br />maintain the three principal hydraulic criteria of average depth, average velocity and percent <br />wetted perimeter; <br /> <br />. 39 cubic feet per second is recommended for July 15 through August 14. This flow is required <br />to maintain two of the three principal hydraulic criteria of average depth. average velocity and <br />percent wetted perimeter; and <br /> <br />. 17 cubic feet per second is recommended for August 15 through March 31. This flow is required <br />to maintain an adequate winter flow. <br /> <br />DEPARTMENT OF NATURAL RESOURCES, Russell George, Executive Director <br />WILDLIFE COMMISSION, Philip James, Chair. Jeffrey Crawford, Vice-Chair. Brad Phelps, Secretary <br />Members. Bernard Black - Tom Burke - Rick Enstrom - Claire O' Neal- Robert Shoemaker. Ken Torres <br />El( Officio Members, Russell George and Don Ament <br />