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<br />~ <br /> <br />IN REPLY REFER TO <br /> <br />United States Department of the Interior <br /> <br />BUREAU OF LAND MANAGEMENT <br />Colorado State Office <br />2850 Youngfield Street <br />Lakewood, Colorado 80215-7093 <br /> <br /> <br />. <br /> <br /> <br />www.co.blm.gov <br /> <br />CO-932 <br />7250 <br /> <br />DEe 20 2COL <br /> <br />Mr. Dan Merriman <br />Colorado Water Conservation Board <br />1313 Sherman Street, Room 721 <br />Denver, Colorado 80203 <br /> <br />Dear Mr. Merriman: <br /> <br />The Bureau of Land Management (ELM) is writing this letter to formally communicate its <br />instream flow recommendation for Keyser Creek, located in Water Division 5. <br /> <br />. <br /> <br />Location and Land Status. Keyser Creek is part of the Canyon Creek watershed, which is <br />tributary to the Colorado River approximately six miles west of Glen wood Springs. The reach <br />that was surveyed starts at the outlet of Blue Lake and extends 3.8 miles to the confluence with <br />East Canyon Creek. This reach is comprised of75 percent federal and 25 percent private land. <br /> <br />Biological Summary. Fishery surveys indicate that the stream environment is in pristine <br />condition, and supports a self-sustaining brook trout fishery. Channel and bank stability, <br />availability of pool habitat, vegetative cover, substrate, and water quality are excellent for <br />salmonids. Because of some natural stream barriers, the stream also has potential to provide <br />habitat for Colorado River Cutthroat Trout. <br /> <br />R2Cross Analysis. BLM collected one data set on the creek and the resulting recommendations <br />were within the confidence interval for the R2Cross model. BLM's data analysis indicates that <br />the following flows are required to protect the fishery and natural environment to a reasonable <br />degree: <br /> <br />2.40 cubic feet per second is recommended for the high temperature period from May 1 to <br />October 31. This recommendation was driven by the wetted perimeter criteria. The fish <br />population in this stream appears to be limited primarily by the amount of physical habitat <br />available and not by other factors such as food supplies. Maintenance sufficient wetted <br />perimeter will prevent physical habitat from becoming more of a limitation on the number <br />and size of fish. <br /> <br />. <br />