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<br />305Z <br /> <br />. <br /> <br />edge. Accordingly, some visitor facilities will be required <br />to be portable, serve dual purposes or be mounted on floating <br />plat forms. <br /> <br />In view of the current Department of the Interior's pOlicy on <br />private use of Project lands, and since suitable public use <br />lands are limited, seasonal cabin areas and club sites are not <br />recommended, <br /> <br />Organized camps may be considered with further study and con- <br />currence with the administering agency and other interested <br />agencies. As pointed out, suitable land with reservoir water <br />access is at a premium and fOr this reason, organized campsites <br />would, in most cases, be without year-round water acceSS. If <br />recreation facilities are developed as recommended, they should <br />be sufficient to handle these groups. If the need for organized <br />campsites is later justified, then it is recommended that these <br />camps be designed to utilize public and concessioner water- <br />oriented facilities. <br /> <br />. <br /> <br />An operation study was made by the Bureau of Reclamation, based <br />on a 38-year period for water years 1928 through 1965. The <br />fluctuations of the water surface area in acres and of the capa- <br />city in acre-feet are shown on Appendix A. The fluctuations of <br />the water surface elevations are shown on Appendix B. In general, <br />the reservoir will fill nearly to the top of the conservation <br />pool each year. During winters of considerable storable winter <br />flow, the water surface will rise up into the joint use (conser- <br />vation and flood control) pool. Water stored in this joint use <br />pool will be used (or evacuated) by April 15. The reservoir <br />drawdown to meet downstream demands will begin in May with the <br />reservoir emptied to the top of the inactive pool before the <br />end of July and sometimes even in June. Therefore, a fluctuation <br />range totaling from 60-90 feet during the recreation season will <br />not be uncommon. Daily fluctuations will normally be only a <br />few inches of drawdown per day but extremes of slightlY over two <br />feet per day may be experienced. Beginning in October the res- <br />ervoir will gradually refill to near the top of the conservation <br />pool by late February or early March. The water surface fluc- <br />tuations during the winter filling period will be much less than <br />those during the summer draw down period. <br /> <br />Because of the severe drawdown, large areas of foreshore will be <br />exposed during parts of the recreation season. Major management <br />problems will concern vehicular traffic control on the foreshore <br />area since facilities will be remote from the shoreline at <br />periods of low surface elevations. However, since the people <br /> <br />. <br /> <br />16 <br />