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<br />SUMMARY OF 1998 OPERATIONS <br /> <br />Water year 1998 runoff was Me.e a.erage throughout the Colorado-Big Thompson Project <br />(Project) varying from H4 percent of average for the inflow into Willow Creek Reservoir to +48 <br />percent of average for the inflow into Green Mountain Reservoir. <br /> <br />Peak inflows to reservoirs within the Project occurred in miB.ftme ..ith the exeel'ti6f1 efWiIl6" <br />Creek Resef'l'sir whiek peaked en May 17 at 1,312 ft'ffl. Inflow to Green Mountain Reservoir <br />peaked on ltiRe 22 at 3,985 ft'ffl. Inflow to Lake Granby peaked on JlIfle 22 at 2,919 it ffl and <br />inflow to Lake Estes peaked on Arne II at 828 Wi,. The ttndepletea inRe.. inte Cl't:en Mel1f1tl1iti <br />R'C3ef\6ir rer ~18.) nltJ tht: highe:3t offt:'ora at 125,200 OCle; feet 3inGC: m3tenie.al reGard.] hegm <br />in 1942. <br /> <br />The maximum release at Green Mountain Reservoir was 2,519 Wi, en Jtine 24. A total volume <br />of25,678 acre-feet was spilled at Green Mountain Reservoir in water year 1998. River releases <br />from Willow Creek Reservoir and Lake Granby were rntIeft Me.e the. normal releases made to <br />meet minimum required releases for fish habitat. Willow Creek Reservoir bypassed 49,743 acre- <br />feet and Lake Granby 3pille<i 72,8BB aere feet during water year 1998. The Lllke CHIn!;, ,piH "It! <br />tile :!eeenB highest ef reeard :!inee reeerB, began in 1962. The river release at Willow Creek <br />Reservoir peaked at I ,311l Wi, en Ma) 17 and the river release from Lake Granby peaked at ~ <br />WI:! feratlllil) a.~en.hmc22. The instaneous peakofJ,11l1l IH:! en./tine 22 n'lt3anMltimc <br />reeeraeB high. release from Lake Granby. The maximum release at Lake Estes was 928 ft,fs--oft <br />:ltme-7. Project water deliveries peaked on May 1 8 at 121l1l Wffi at Horsetooth Reservoir and-4lH- <br />WI:! an :.lIguM 17 at Carter Lake. The maximum project delivery of ~ffi occurred on-May <br />3 to the Big Thompson River. <br /> <br />Water year 1998 precipitation totals for October-September were lIltIeh MIl. e a .eillge and ranged <br />from -lOO percent of average for the Willow Creek and Lake Granby watersheds to ~ percent <br />of average for the Lake Estes and St. Vrain watersheds. <br /> <br />Winter precipitation (October-January) on the Project was m11eh MI"e a.erage at -HI+ percent <br />of average. Green Mountain Darn during January received ~ inches of precipitation which <br />was 345 percent of average. The east slope of the Project was '.~ net. During January, the <br />Lake Estes and St. Vrain watersheds received 3-:e4 inches of precipitation which was ~ percent <br />of average, and the Poudre watershed received f:.56 inches of precipitation which was 459 percent <br />of average. January I snowpack totals were +8 percent of average for the Upper Colorado Basin <br />and +54 percent of average for the South Platte Basin. February I snowpack totals were 1Ii:l6 .~ <br />Iligft ranging from H;t percent for the Willow Creek watershed to -i43 percent for the St. Vrain <br />watershed. Temperatures were varied for October-January over the Project. F6rt CaHiM, <br />Colouwo ICCOItkd the big-heM JltlittihJ 12 teJ.rtpCiMl:u.' Jmoc 1888 M 7J op. <br /> <br />On. DeeGll1bcr 12, 1995, dtirmg arotttill~ Jy,titehing proc.edtJrc, 111' FlMiran POnerpltlflt 189 "ok <br />3tatiel\ ~ef'T" ie;c tic b:realocr ekhi) e.d in dOJing, 3cttm~ aft" 8. chain of e,,, ent3 1I18.t e.nded Hi.th 8ft. <br />e,xl'103iol1 in Ptifilp/CeftetMOf Unit 3. Tk {.x131a3ion rupture.d the. air ft6tl3mg efthe tltlit, lifted <br />the; e6" ef3 oiI1:hc 1'1ant loof, ge.nerated 8. fIreball, and. e8tt3Gd G}fteooi" e ather eltunftge in the 1514111. - <br /> <br />filename: CBT AOP98.DFT <br /> <br />I <br /> <br />Preliminary Working Draft July 8.1999 <br />