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To date, staff has received and considered only one flow recommendation for this reach of the East Fork of Parachute Creek. That recommendation is discussed in detail below. Instream Flow Recommendation{s) I BLM's in stream flow recommendation is for 2.0 cfs (April I - June 30), 1.5 cfs (July 1 to July 31),1.0 cfs (August 1- August 31) and 0.8 cfs (September 1- March 30) (see BLM letter in Appendix A). Land Status Review Upper Terminus JQS & Golden Castle Lower Terminus Second Anvil Creek Total Length (miles) 2.2 Land Ownershi % Private % Public 0% 100% This segment is located on 100% public land managed by the BLM (See attached Figure 1). Biological Data The Colorado Division of Wildlife (CDOW) and BLM have conducted field surveys of the fishery resources on this stream and have found a natural environment that can be preserved. The BLM has conducted field surveys of the fishery resources on this stream and have found a natural environment that can be preserved. As reported for this reach of stream in their September 24, 1999, letter to the CWCB and enclosed fishery surveys (see CDOW Report and BLM Fishery Survey in Appendix B), "Fishery Surveys indicate that the stream environment is in stable condition and supports both Colorado River cutthroat trout and brook trout. From historic data it appears that the brook trout population is out competing the native trout population. Spawning substrate, pool habitat and food availability are excellent for salmonids but lack of vegetative cover in some reaches is a limiting factor. This underscores the importance of maintaining adequate flows so that stream temperatures do not become excessively high." Field Survey Data BLM and CWCB staff used the R2CROSS methodology to quantify the amount of water required to preserve the natural environment to a reasonable degree. The R2CROSS method requires that stream discharge and channel profile data be collected in a riffle stream habitat- type. Riffles are most easily visualized, as the stream habitat types that would dry up first should the streamflow cease. This type of hydraulic data collection consists of setting up a transect, surveying the stream channel geometry and measuring the stream discharge. Appendix B contains copies of the field data collected in regards to this proposed segment. Biological Flow Recommendations The CWCB staff relied upon the biological expertise of the cooperating agencies to interpret the output from the R2CROSS data collected to develop the initial, biologic in stream flow recommendation. This initial recommendation is designed to address the unique biologic requirements of each stream without regard to water availability. Three in stream flow hydraulic parameters, average depth, percent wetted perimeter and average velocity are used to develop biologic in stream flow recommendations. The CDOW has determined that by maintaining these three hydraulic parameters at adequate levels across riffle habitat-types, aquatic habitat in pools and runs will also be maintained for most life stages of fish and aquatic invertebrates (Nehring 1979; Espegren 1996).