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<br />(c) Upper llasin reservoirs In addition to La~e Powell include <br />Fontenclle, Flam1nr, CarRe, Uluc MesA, Horrow PoJnt nnd Nnv<1jo. Elich <br />reRervo1r has been operated to 6atisfy rnultipurpofic uses which inc.lude <br />recreation, fish and wildlife, flood control, irrip,.1tion, and power and <br />river runnIng. The infloIJ to I.AKe Powell has heel\ directly affected by <br />the releases from upstream reservoir~. At Flaminp, \'orp,e daily releases <br />have varied from a minimum of 400 ft Is to a maxImum of 4,400 ftJ/s. <br />fontenelle Reservoir has been operated to control the runoff in such a <br />manner as to reduce the peak floIJ during sprin[; runoff. Horrow Point <br />and Blue Hesa Reservoirs were operated as <l unit to satisfy uownstrcam <br />irrigation rigbts and to assist in meeting CRSP pOlJer commitments <br />during the summer months. Navajo Reservo1r WAS operated to maintain <br />the desired levels for recreational purposes compatible with <br />flood control space requ1rements until releases IJere made for the <br />Navajo Indian Irrigation Project. <br /> <br />Pi thin the mentioned up~tream reservoir o'f'erat1.ons, there have <br />been conflicts in satisfying all the desired multIpurpose uses with <br />those tlcmnnds on Lnke Powell. These conflictR were relnted to rCl:re.lt1on, <br />fish nnd ul1cllife, powerplant operations, :l11J power fiYStCIlI nctwor~: <br />limita tions. <br /> <br />(d) DurinI'. the operstion of Lake Powell under the Flll.lnp. <br />CrIterin and the pnst 4 years under the Coordinnted Opprntinp, Criteria. <br />annuRI releases determined by these criteria (discusseel In Section Co2. (a) <br />above) have been scheduled to optimize the use of the wster [or hydro., <br />electric power generation after considerstIon of the flow requirements <br />for fish and recreation below Glen Canyon Dam and for bR5s spawning at <br />Lake Mead. The pattern of energy generat10n has been compatible "11th CRSP <br />customer loads and interchange IJith adjacent interconnected pOIJer <br />systems. <br /> <br />Since 1970, energy generated by CRSr plants has been sub- <br />stantinlly less than CRSP load requirements. In order to avoid foregoing <br />the use of surplus pOIJer generated by interconnected adjacent systems to <br />supply CRSP customers, release prttterns at Glen Canyon ns well as other <br />Upper lJasin pOIJerplants have been modified. In some instanc.es, such as in <br />the fall 197J and spring 1974, had CRSP not been ahle to reduce Its <br />generation Rnd nllO\, a portion of the cr.sr pO\Jerload be supplied by <br />Bonneville Power Authority, water would have hypassed Columbia naoin <br />po'Werplants resulting in the wnste of hydropo\olcr find tile slIhscC]uent <br />burning of fossil fuels to replace the power. <br /> <br />10 <br />