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<br />o <br />a <br />G <br />..... <br /><0 <br />W <br /> <br />b) Grand Valley Diversion Dam - Top 15 Mile Reach <br />c) 15 Mile Reach <br />d) Bottom 15 Mile Reach at Gunnison River confluence - Colorado-Utah Stateline. <br />V. Gunnison River <br />a) Delta, CO to the confluence of the Gunnison River and the Colorado River. <br />VI. Dolores River <br />a) Confluence of San Miguel River and Dolores River to the Colorado-Utah State line, <br />VII. San Juan River and tributaries in Colorado. <br />a) San Juan within Colorado near Four Comers <br /> <br />There are a number of general tasks applicable to studies on all of the stream reaches being <br />evaluated. They include the following: <br /> <br />Study Period Review - The Board staff has recommended using the 1970-1992 period of record <br />for the physical water availability analysis. This period of record was selected because it <br />included both the driest (1977) and the wettest years (1983-1984) and was generally reflective <br />of conditions that now exist following a period of major reservoir development. It also <br />represents a period during which records for all subbasins included in the analysis are <br />substantially available. <br /> <br />Stream Gage Evaluation - Stream gage records, will be identified and reviewed to determine <br />if the recorded data is adequate and complete for the study period. At gaging stations where the <br />record is either incomplete or inadequate, the data gaps will be filled by appropriate statistical <br />methods. Stream flow records in each stream segment will be adjusted to account for any major <br />changes in water use which may have occurred during the study period; such as changes in <br />transbasin diversions, major changes in agriculture/municipal uses, or the operation of large <br />reservoirs which may skew the physical water availability analysis. The purpose of these <br />adjustments will be to bring all gaging station records during the identified study period to a <br />1992 level of depletion. Adjusted stream flow data will be compared to and correlated with the <br />Bureau of Reclamation's CRSS "natural flow database" where possible to see if those <br />correlations can be used at other gaging stations where there is not a "natural flow database" but <br />where "natural flows" may be needed in subsequent compact analysis. <br /> <br />The results of the water availability study, including basic data, analysis and other relevant data <br />will be presented in a final report and appropriate technical appendices. Data and results of the <br />statistical analysis will be provided on a daily, monthly and annual basis in cfs and acre-feet, <br />and in both tabular and graphical form. Hydrographs for the wettest, driest, upper and lower <br />decile years, upper and lower quartile years and an average year will be provided and modified <br />to show the impact of "Development Projections" discussed below, The final report and <br />technical appendices will also describe the selection of data and any limitations of the data. <br /> <br />Legal Water Availability Studies <br /> <br />Reasonably Foreseeable Development Water Needs Study - The staff will develop for each <br />stream segment, an estimate of the amount of water needed for any "reasonably foreseeable" <br />water development. This will help to avoid potential near-term (within next 5-years) conflicts <br />between the Board's fish recovery instream flow appropriations and any reasonably foreseeable <br /> <br />7 <br />