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<br />Water Year 1994 <br /> <br />Both Lakes Mohave and Havasu are scheduled to be drawn <br />down in the fall and winter months to provide storage space <br />for local storm runoff and will be filled in the spring to meet <br />higher summer water needs. This drawdown will also <br />correspond with maintenance at both Davis and Parker <br />Powerplants which is scheduled fOf OclobeT 1993, Ihmugh <br />March 1994. The normal filliog pattern of these two <br />reservoirs coincides well with the fishery spawning period. <br />Since lake elevations will be similar to previous years, <br />Telalively normal conditions are expected for boating and <br />other recreational uses. <br /> <br />Accomplishments of the Natln Fish Work Group <br /> <br />The Bureau of Reclamation is the lead agency in the Native <br />Fish Work Group (NFWG), a multi-agency team working to <br />replace the existing, aging adult razorback sucker population <br />in Lake Mohave. These fIsh average over 40 years of age <br />and recruitment of young appear annually fails due to <br />predation by exotic fIshes and other exotic aquatic animals. <br />Projections in 1988 indicated the adult population would die <br />off prior to the turn of the century. <br /> <br />During the spring and summer of 1993, over 1400 juvenile <br />razorback snckers were reared in lake-side backwater ponds. <br />In the fall roughly 400 of these fIsh were released into Lake <br />Mohave and the remainder were placed into Davis Cove for <br />further rearing. These laller fish will be released in early <br />spring. <br /> <br />Population estimates for data collected through 1988 <br />projected a resident population of 60,000 fish. The data for <br />1989, 1990, 1991 (based on recaptures of marked fish) <br />showed the population to have dropped to 47,000 fIsh, and <br />1992 and 1993 data shows only 25,000 adults remaining or <br />roughly 40 percent of the 1988 estimate. <br /> <br />ACTUAL STORAGE 1993 <br /> <br />MILlION CUBIC IIITVtI <br />'100 <br /> <br />1IIOUUIID ACM-IIUT <br />U8I <br /> <br /> L r-.... <br /> / -~ I "-- <br /> / " 1"'- <br />1'--.. <br /> '\ <br /> <br />.000 <br /> <br />2'" <br /> <br />Z400 <br /> <br />1"" <br /> <br />2200 <br /> <br />'712 <br /> <br />'000 <br /> <br />1I2D <br /> <br />1000 <br /> <br />1411 <br /> <br />'") .I <f5' ., ~ ., .,. ; ". ~ , ,i'" <br /> <br />18 <br /> <br />MOST PROBABLE RELEASES 1994 <br /> <br />IIIUJON CUBIC IIITBI <br />1'00 <br /> <br />TlIOUIAND ACfI!-PI!ET <br /> <br /> 1 <br /> ......- <br /> / '\ <br /> \.. <br />r-.... ..- V <br /> <br />1" <br /> <br />1200 <br /> <br />172 <br /> <br />'000 <br /> <br />110 <br /> <br />100 <br /> <br />..I <br /> <br />100 <br /> <br />481 <br /> <br />... <br /> <br />... <br /> <br />200 112 <br />~ It <f-c,.; ~."..,.; ~+ ~ ~, <br /> <br />MOST PROBABLE REGULATED INFLOW 1993 <br /> <br />.'WON CUBIC ..-rue <br />'800 <br /> <br />THOUIAND ACfI&PDT <br /> <br /> 1 <br /> 1 <br /> ..... V '" <br /> 1/ t'-- "- <br />1\ 1/ I"" <br /> <br />... <br /> <br />,- <br /> <br />134 <br /> <br />12" <br /> <br />on <br /> <br />'000 <br /> <br />.,. <br /> <br />100 <br />lID <br /> <br />... <br /> <br />- <br /> <br />- <br /> <br />... <br /> <br />') .I <f5' )~ ~ ., , ; ? ~ , ,,'" <br /> <br />MOST PROBABLE STORAGE 1994 <br /> <br />IllWON CUIIC III!TUS <br /> <br />ntOUUIID AC......IT <br />12" <br /> <br />100 <br />"0 <br />"0 <br />200 ~ <br /> " <br />000 \ <br /> 1/ <br /> f'... <br />800 <br /> <br />I <br /> <br />. <br /> <br />1108 <br /> <br />. <br /> <br />1,," <br /> <br />. <br /> <br />171' <br /> <br />. <br /> <br />,... <br /> <br />1481 <br /> <br />, ~./' <f5' .; ~ .". .,. +~ ? ~ , ~12H <br />