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<br />DOIo1T1stream water orders may change sip,niftcantlv, from orir,inal <br />projections, due to unpredictable dry or wet periods in irrIr,ated <br />areas. When these changes occur, LakeR Moh.1ve find Ilnvllf;u lire uReJ <br />for short periods to store excess WR.ter or to meet increased dcmllnc1f;. <br />These deviations are rescheduled into Lake Mend all Boon as practical>lc. <br />Lakes 110have and Havasu are operated, generally from August through <br />October, with reserve capacity to allo", for 6torar,e of excess water, <br />and with sufficient volumes of water, April through June, to meet rapId <br />increases in water orders. Generally, Hoover Dam releases are not <br />:lmmediatley responsive to ",eather conditions, unless Lakes ~lohave or <br />Ilavasu become excess1vely full or 10"'. <br /> <br />A minor amount of modification to the monthly rele.~se schedule <br />is accomplished by reregulating Lake Head releases in Lakes Mohave and <br />Havasu for short periods. In addition, water in excess of scheduled <br />deliveries may be pumped into the Senator '.-lash Regulating Reservoir <br />for later use and to save water and improve water deliveries to users <br />in both the United States nnd Hexico. Ileregulation of LaJ(e Mead relem;e <br />Bchedulca may be necessAry for the followiIlg r('nt-iOns: <br /> <br />(a) Delivery of water to Mexico in accord.1nce wi th Treaty <br />reC]ulrementa. <br /> <br />(b) Permit Hoover Darn energy to be developed to more near] y <br />satisfy the actusl requirements. <br /> <br />(c) MInImi?e waste of "'ater by retaIning it in storage when <br />unpredictsble storm activity causes a decrease In water <br />orders. <br /> <br />(rl) Heec sudden increases in water orders in agricultural <br />areas. <br /> <br />(e) Maintain water levels at and consistenc with che neeus of <br />downstream reservoirs. <br /> <br />(f) Assist to the extent possible, in ma1ntaining some level <br />control at Lake Mead. <br /> <br />c. Flood Control. <br /> <br />1. Lake Powell. Inflo",s to Lake Powell are rel',ulated hy a formal <br />flood control operation of lIavajo Reservoir on the San .Juan RIv"r and <br />Blue Hesa Reservoir on the Gunnison River. Incidental storage at <br /> <br />13 <br />