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<br />(.=> <br />(:) <br />,~ <br />..... <br />-.J <br />W <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 />Studv Period Review - The Board staff has recommended using the 1970- I 992 period of record <br />for the physical water availability analysis. This period of record was selected because it <br />included both the driest (I977) and the wettest years (I983-1984) and was generally reflective <br />of conditions that now exist following a period of major reservoir development. It also represents <br />a period during which records for all subbasins included in the analysis are substantially available. <br /> <br />Stream Gage Evaluation - Stream gage records, will be identified and reviewed to determine if <br />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 1992 <br />level of depletion. Adjusted stream flow data will be compared to and correlated with the Bureau <br />of Reclamation's CRSS "natural flow database" where possible to see if those correlations can <br />be used at other gaging stations where there is not a "natural flow database" but where "natural <br />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, and <br />in both tabular and graphical form. Hydrographs for the wettest, driest, upper and lower decile <br />years, upper and lower quartile years and an average year will be provided and modified to show <br />the impact of "Development Projections" discussed below. The final report and technical <br />appendices will also describe the selection of data and any limitations of the data, <br /> <br />Legal Water Availability Studies <br /> <br />Reasonablv Foreseeable Development Water Needs Studv - The staff will develop for each stream <br />segment, an estimate of the amount of water needed for any "reasonably foreseeable" water <br />development. This will help to avoid potential near-term (within next 5-years) conflicts between <br />the Board's fish recovery instream flow appropriations and any reasonably foreseeable water <br />resource projects which may be developed under water rights that would be junior to the Board's <br />fish recovery instream flow appropriations. This is not intended to be an intensive effort, but <br />rather a means to help assure that no reasonably viable project is overlooked which may be in <br />the early planning stages. The staff, in coordination with the Board's Endangered Fish <br />Subcommittee, will use the following process: <br /> <br />8 <br />