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<br />e <br /> <br />e <br /> <br />e <br /> <br />the City of Cripple Creek and the Cripple Creek/Victor Mining Company, <br />recommendations are discussed in detail below. <br /> <br />These <br /> <br />Instream Flow Recommendation(s) <br /> <br />1 BLM's in stream flow recommendation is for 13,0 cfs (April I - October 31) & 4,5 cfs <br />(November 1 - May 31) (see BLM letter in Appendix A), <br />2 WWW & QR's flow recommendation is for 6,0 cfs (April I - July 31) & 4,25 cfs <br />(August I - March 31) (see WWW/QRExecutiveSummary in Appendix A), <br /> <br />Land Status Review <br /> <br /> Total Length Land Ownership <br />Upper Terminus Lower Terminus (miles) % Private % Public <br />Trail Gulch Felch Creek 6,9 92% 8% <br /> <br />This segment is approximately 8% public land and 92% private land, 100% of the public land is <br />managed by the BLM (See attached Figure I), <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, In <br />this reach of stream, a coldwater fish species was sampled (brook & brown trout) to indicate the <br />existence of a natural environment (See CDOW Reports: Fremont and Teller County Aquatic <br />Community Monitoring 1994 & 1995 and 319 Assessment in Appendix B), <br /> <br />Field Survey Data <br /> <br />WWW, BLM, CDOW and CWCB staff used the: R2CROSS methodology to quantify the amount <br />of water required to preserve the natural environment to a reasonable degree, The R2CROSS <br />method requires that stream discharge and channel profile data be collected in a riffle stream <br />habitat-type, Riffles are most easily visualized, as the stream habitat type that would dry up first <br />should the streamflow cease, This type of hydraulic data collection consists of setting up a <br />transect, surveying the stream channel geometry and measuring the stream discharge, Appendix <br />B contains copies of the field data collected in re:gards to this proposed segment, <br /> <br />Biological Flow Recommendations <br /> <br />The CWCB staff relied upon the biological expe:rtise of the cooperating agencies to interpret the <br />output from the R2CROSS data collected to develop the initial, biologic instream flow <br />recommendation, This initial recommendation is designed to address the unique biologic <br />requirements of each stream without regard to water availability, Three instream 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, one data set was collected with the results shown in Table 1 below, <br />Table I shows who collected the data (Party), the date the data was collected (Date), the <br />measured discharge at the time of the survey (Q), the accuracy range of predicted flows based on <br />Manning's Equation (240% and 40% of Q), the summer flow recommendation based upon <br />meeting 3 of 3 hydraulic criteria and the winter flow recommendation based upon 2 of 3 <br />hydraulic criteria. <br />