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<br />001481 <br /> <br />WatQS R~h9l~ts Dif(i9_1.llt..,_J:;..<?_f3t:-~u~~ <br /> <br />Evon though the Game, Fish and P2lrks Department has <br /> <br />".. <br /> <br />been tJ:'ying since 1965 to purchase suff.i.cient wa"cer rights for <br /> <br />eS"i::ablishmen'c of the permanent pool, i"c has been only par"tially <br /> <br />successful. <br /> <br />'1'he es'cimat,ed average ann-,lal evaporation from a 10,000 <br /> <br />acre-foot permanen-c poaJ_ is 3,600 acre-feet6 when calculated <br /> <br />from 20 years of historic s'torage records. This is only the <br /> <br />evapora'cion from the additional area caused by the permanen't <br /> <br />pool - when 'the conservation pool is rela"cively full, the perm- <br /> <br />anent pool exposed area is only a small part of the total area, <br /> <br />but when the conservat,ion pool is dry, the total area exposed to <br /> <br />evapora'tion is tha"c of the permanent: pool. The reservoir evap- <br /> <br />oration rate was assumed to be seven tenths of the measured U. S. <br /> <br />Weather Bureau Class A pan evaporation. <br /> <br />Several factors m~~e purchase of sufficient water rights <br /> <br />difficult. One is tha't -tl1e Arkansas River is over-appropria'ted. <br /> <br />That is, therG arG more rights than 'chG normal rivGrflow. so a <br /> <br />certain supply from a 'da"ter right canno't bG depended upon from <br /> <br />year to year unless i,t is one of the very best.' Anot,her is that <br /> <br />6Study conducted by the staff of 'the Colo:cado lvater Conservation <br />Board. <br /> <br />-11- <br />