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<br />received and considered only one flow recommendation for this reach of East Fork of Parachute <br />Creek. That recommendation is discussed in detail below. <br /> <br />Instream Flow Recommendation{s) <br /> <br />1 BLM's in stream flow recommendation is for 2.3 cfs (April 1 - June 30), 1.9 cfs (July 1 to <br />July 31), 1.1 cfs (August 1 - August 31) and 0.8 cfs (September 1 - March 30) (see BLM <br />Letter in Appendix A). <br /> <br />Land Status Review <br /> <br />Upper Terminus <br />Second Anvil Creek <br /> <br />Lower Terminus <br />First Anvil Creek <br /> <br />Total Length <br />(miles) <br />1.9 <br /> <br />Land Owners hi <br />% Private % Public <br />0% 100% <br /> <br />This segment is located on 100% public land managed by the BLM (See attached Figure 1). <br /> <br />Biological Data <br /> <br />The Colorado Division of Wildlife (CDOW) and BLM have conducted field surveys of the <br />fishery resources on this stream and have found a natural environment that can be preserved. The <br />BLM has conducted field surveys of the fishery resources on this stream and have found a <br />natural environment that can be preserved. As reported for this reach of stream in their <br />September 24, 1999, letter to the CWCB, "Fishery Surveys indicate that the stream environment <br />is in stable condition and supports both Colorado River cutthroat trout and brook trout. From <br />historic data it appears that the brook trout population is out competing the native trout <br />population. Spawning substrate, pool habitat and food availability are excellent for salmonids <br />but lack of vegetative cover in some reaches is a limiting factor. This underscores the <br />importance of maintaining adequate flows so that stream temperatures do not become <br />excessively high." (see CDOW Report and BLM Fishery Surveys in Appendix B), <br /> <br />Field Survey Data <br /> <br />BLM and CWCB staff used the R2CROSS methodology to quantify the amount of water <br />required to preserve the natural environment to a reasonable degree. The R2CROSS method <br />requires that stream discharge and channel profile data be collected in a riffle stream habitat- <br />type. Riffles are most easily visualized, as the stream habitat types that would dry up first should <br />the streamflow cease. This type of hydraulic data collection consists of setting up a transect, <br />surveying the stream channel geometry and measuring the stream discharge. Appendix B <br />contains copies of the field data collected in regards to this proposed segment. <br /> <br />Biological Flow Recommendations <br /> <br />The CWCB staff relied upon the biological expertise of the cooperating agencies to interpret the <br />output from the R2CROSS data collected to develop the initial, biologic in stream flow <br />recommendation. This initial recommendation is designed to address the unique biologic <br />requirements of each stream without regard to water availability. Three in stream flow hydraulic <br />parameters, average depth, percent wetted perimeter and average velocity are used to develop <br />biologic instream flow recommendations. The CDOW has determined that by maintaining these <br />three hydraulic parameters at adequate levels across riffle habitat-types, aquatic habitat in pools <br />and runs will also be maintained for most life stages of fish and aquatic invertebrates (Nehring <br />1979; Espegren 1996). <br /> <br />For this segment of stream, two data sets were collected with the results shown in Table 1 below. <br />The two surveys are listed in the order of where they are located on the segment, starting from <br />