Laserfiche WebLink
<br />1026 <br /> <br />. <br /> <br /> <br />Tur~uoise Lake Hill De 'operated for regulation of project ;;ater and <br />for- regulation of nonproject ;;ater on a service basis, as ;;ell as <br />for incidental fish and ;;ildlife and recreation purposes. <br /> <br />The purpose of this report is to provide a basis for increased <br />cooperation ,and understanding among all concerned Hith the coor- <br />dinated o~eration of the project. <br /> <br />The report has t;;o main parts. One part reports the re~ults of <br />actual operations through water year 1973. The other presents <br />operations plans for wat,er year 1974. <br /> <br />In establishing the general plan for future operations, three possi- <br />bilities are considered: (l) a reasonable maximum water 'supply <br />which might be expected, (2) a reasonable minimum, and (3) the <br />most probable supply. These three conditions of water supply are <br />derived by statistical analysis of historical water supply data. <br />Statistically, there is one chanoe in ten that the actual runoff <br />will either be greater or less than the volumes indicated as reason- <br />able maximum and r,easonable, minimum. Annual inflow of a magnitude <br />equaled or exceeded 50 percent of the time is considered the most <br />probable supply. Exhibit 1 illustrates the probability curves <br />used. Once established, however, the Annual Operating Plan does <br />not remain rigid. From time t,o time revisions are made as new <br />information becomes available. Flexibility is a keynote of the <br />plan. <br /> <br />. <br /> <br />Rerort on Operations During Water Year 1973 <br /> <br />Ruedi Reservoir <br /> <br />Ruedi Reservoir had 95,657 acre-feet of storage on October l, 1972. <br />Operation of the reservoir through Nove~ber l5 was in oompliance <br />with a request by the U.S. Bureau of SP9rt Fisheries and Wildlife <br />for the enhancement of brown trout spa;;ning. After a one-day release <br />of 290 c.f.s. to flush fines from the redds, releases were hel.dat <br />around lOO c.f.s, for the period October 5 through November l5. <br />Then, in order to, attain maximum flood control benefits, the reser- <br />voir was drawn down to a point where refilling woul.d be assured <br />under reasonable minimum in'flow cond.i tiims . During this period <br />of drawdown the release from Ruedi Rese~voir averaged l75 c.f.s. <br />On the lst of March there was 6l,956 aq~e-feet in storage. <br /> <br />Based on forecast derived from the March 1 snow survey, Ruedi <br />Reservoir release was reduced to l45 c.f.s. during March. <br /> <br />. <br /> <br />6 <br />