Laserfiche WebLink
<br />section #2 and the lower terminus was adjusted up from the confluence with West Muddy Creek <br />to the Bell Ranch diversion headgate location. <br /> <br />land Status Review <br /> <br /> Total Length Land Ownership <br />Upper Terminus Lower Terminus (miles) % Private % Public <br />Unnamed Lake Bell Ranch #1 5.2 0% 100% <br /> <br />100% of the reach is located on federal lands managed by the USFS. <br /> <br />Biological Data <br /> <br />The USFS has conducted field surveys of the fishery resources on this stream and have found a <br />natural environment that can be preserved. As reported in the letter from USFS to the CWCB <br />"Fishery surveys indicate that the stream environment is presently in stable condition, and <br />supports a self-sustaining native cutthroat and brook trout fishery. Colorado River cutthroat trout <br />in Dyke Creek meet Conservation Population definitions as defined in the Conservation <br />Agreement and Strategy for Colorado River Cutthroat Trout in the States of Colorado. Utah. and <br />Wyoming (April 2001). Conservation Populations are defined as a population of fish with less <br />than 10% introgression (greater than 90% genetically pure). <br /> <br />Fish habitat parameters are good for salmonids providing adequate cover and good summer and <br />winter rearing habitat. The stream has an overall stream gradient of approx. 4%. The upper most <br />reach and the segment above the confluence with West Muddy Creek are the steeper segments. <br />The middle several miles of stream are a low gradient alluvial stream set in a wide valley bottom <br />with extensive wetlands and beaver dams. Accordingly, it is important to provide stream flows <br />that protect the limited amount of available habitat if the continued existence of the fishery is to <br />be assured" (See USFS Fish Survey in Appendix B). <br /> <br />Flows in Dyke Creek sustain a rich and diverse riparian ecosystem made up of sedge/willow <br />plant communities and the wildlife species that depend upon that habitat type. <br /> <br />Field Survey Data <br /> <br />USFS staff used the R2Cross methodology to quantifY the amount of water required to preserve <br />the natural environment to a reasonable degree. The R2Cross method requires that stream <br />discharge and channel profile data be collected in a riffle stream habitat type. Riffles are most <br />easily visualized, as the stream habitat types that would dry up first should streamflow cease. <br />This type of hydraulic data collection consists of setting up a transect, surveying the stream <br />channel geometry, and measuring the stream discharge. Appendix B contains copies of field <br />data collected for this proposed segment. <br /> <br />Biological Flow Recommendation <br /> <br />The CWCB staff relied upon the biological expertise of the cooperating agencies to interpret <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 /> <br />- 3 - <br />