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Section 6 <br />Water Needs Assessment <br />6.1.3.3 Approaches to Determining <br />Environmental Flow Needs <br />TNC proposed the following components to serve as part <br />of an initial method to quantify environmental water <br />demands: <br />TNC has offered its assistance, along with the Colorado <br />Water Caucus, in data collection and characterization <br />efforts, including gathering a team of experts in riparian <br />and aquatic ecology to work with the CWCB and Basin <br />Roundtable members. <br />^ A coarse statewide characterization <br />^ A select set of pilot projects (two to five) at critical <br />conservation sites <br />Trout Unlimited suggested that portions of the UPCO <br />Study and other similar approaches be implemented to <br />identify priority stream reaches within each basin that are <br />used for recreational purposes. <br />^ An evaluation of specific environmental demand after <br />preliminary identification of likely project locations Table 6-1 provides a summary of the methods and data <br />through SWSI sources suggested by these groups for determining <br />environmental and recreational water needs. <br />Table 6-1 Summa of Su estions for Determinin Environmental and Recreational Needs <br /> , <br /> <br />Environmental Determine restoration .- Stream gage data ~ USGS: http://waterdata/usgs.gov/co/nwis/rt <br />Defense and flow using ^ Aerial photos ^ USGS and University of Colorado's Center for the Study of Earth <br />Trout Unlimited methodology outlined ^ Topographic info from Space (CSES) <br /> in Covington and ^ USGS topographic quadrangle maps <br /> Hubert 2003 ~ <br />TNC Determine water- - ^ CDOW <br /> dependent species ^ CNHP <br /> and ecosystems ^ Colorado Water Trust, Documentation of Mapping of Critical <br /> Water-Dependent Natural Systems, prepared for CDOW, <br /> June 30,2002 <br /> ^ TNC Ecoregional Plans <br /> ^ U er Colorado River Endan ered Fish Recove Pro ram <br />TNC Determine ^ Base flows - <br /> environmental or ^ Normal high flows <br /> instream needs of the ^ Drought and flood conditions <br /> s stems ^ Interannual variabilit <br />Other information and relevant sources: <br />Trout Unlimited - ^ Instream flow and natural lake level ^ http://cwcb.state.co.us/isf/Database <br /> water ri hts <br />Trout Unlimited - ^ Recommendations for instream flow ^ CDOW <br /> and lake level a ro riations <br />Trout Unlimited - ^ Minimum and recommended ^ American WhitewaterAssociation: <br /> optimum flow levels for popular http://www.americanwhitewater.org/rivers/state/CO <br /> ka akin and raftin stream reaches <br />Additional re orts to consider. <br />Trout Unlimited ^ USFWS, PBO for the BOR's Operations and Depletions, Other <br /> Depletions and Funding and Implementation of Recovery <br /> Program Actions in UPCO, December 1999 <br />Trout Unlimited ^ USFWS, Recovery Implementation Program, Flow <br /> Recommendations to Beneft Endangered Fishes in the <br /> Colorado and Gunnison Rivers, Final Re ort, Jul 2003 <br />Trout Unlimited - - ^ Hydrosphere Consultants, Inc. Gunnison River - Aspinall Unit <br /> Temperature Study, Phase 1, Final Report, for the Endangered <br /> S ecies Recover Pro ram, March 2002 <br />Trout Unlimited ^ Roehm, G.W, USFWS, Mountain Prairie Region. A Draft <br /> Management Plan for Endangered Fishes in the Yampa River <br /> Basin and Environmental Assessment, Denver, 2003 <br />Trout Unlimited ^ USFWS, UPCO Endangered Fish Recovery Program, Summary <br /> of Section 7 Consultations <br />Trout Unlimited ^ USFWS, 2002 Red Mesa Ward Reservoir Project Biological <br /> 0 inion <br />r~ <br />S:\REPORIIWORD PROCESSING\REPORllS6 11-8-04.DOC 6-7 <br />