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<br />f <br />\,1 <br />~ <br />I <br />I <br />t <br />I <br />,I <br />ij <br />i <br />II <br />I <br />I <br />I <br />f <br />I <br />, <br />I <br />I <br /> <br />representing the City of Cripple Creek and the Cripple Creek/VictDr Mining Company. These <br />recommendations are discussed in detail below. <br /> <br />Instream Flow Recommendation(s) <br /> <br />1 BLM's instream 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 1 - July 31) & 4.25 cfs <br />(August 1- March 31) (see WWW/QRExecutive Summary in Appendix A). <br /> <br />Land Status Review <br /> <br /> Total Length Land Ownership <br />Upper Terminus Lower Terminus (miles) % Private % Public <br />Cripple Creek Trail Gulch 3.6 40% 60% <br /> <br />This segment is approximately 60% public land and 40 % private land. 50% of the public land is <br />managed by the BLM and 50% is managed by the Colorado State Land Board (See attached <br />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. 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 A). <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 hydTaulic 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 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 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, four data sets weTe collected with the results shown in Table 1 <br />below. The four surveys are listed in the order of where they are located on the segment, starting <br />from the most upstream survey to the most downstream sUTvey. Table 1 shows who collected <br />the data (Party), the date the data was collected (Date), the measured discharge at the time of the <br />survey (Q), the accuracy range of predicted flows based on Manning's Equation (240% and 40% <br />