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<br />o <br />c- <br />~, <br />t},,; <br />c <br /> <br />24. Max1Jaum creditable space as tabulated 1n the preceding <br />paragraph, excepting lake Powell space, \l8S derived for each reservoir <br />by subtracting normal releases from inflow values based on a Januar,y- <br />July inflow forecast to Lake Mead of 20,000,000 acre-feet. This is <br />the miDiDlUlll forecast requiring flood releases frOJll Lake Mead. Addi- <br />tional infoI'IIIBtion on III8X1mum creditable space is contained in the <br />fol.l.owing SUbparagraphs: <br /> <br />a. Lake Powell lD8x1JIIWD storage space, if no space were <br />avail.lLble upstre8l/l, would be 5,350,000 acre-feet (1 January D18x1mUID <br />Lake Mead required space) III1nus 1,500,000 acre-feet (Lake Mead III1n1/llwn <br />required space) or 3,850,000 acre-feet. <br /> <br />b. Navajo D18x1mUJD storage space is the total active space, <br />1,036,J.OO acre-feet. <br /> <br />c. Blue Mesa D18x1mu1l1 storage space is also the total active <br />space, 748,500 acre-feet. <br /> <br />d. Flaming Gorge _ldJIIWD storage space \l8S computed by de- <br />ducting from the expected JanUli1ry - July inflow of 2,180,000 acre- <br />feet (assUlll1ng the inflow forecast to Lake Mead 18 20,000,000 acre- <br />feet) the expected January - July outflow of 672,800 acre-feet resulting <br />in 1,507,200 acre-feet. <br /> <br />e. During the period 1 January to 1 August, when operations <br />depend on inflow forecasts to Lake Mead, the amount of creditable <br />storage space at Navajo, Blue Mesa, and Flam.1ng Gorge depends on in- <br />dividual inflow forecasts. MioimUID forecasts are used so that the <br />space will be fUled 19 times out of 20. This space is as dependable <br />as space in Lake Mead, which is controlled io accordance with an inflow <br />forecast that will be e:xceeded 1 time in 20. <br /> <br />25. 1 January to 1 August releases. --For the period 1 January to <br />1 AuguIlt, 1111n1mum releases frolll Hoover Dam to attain the I August flood- <br />control space of 1,500,000 acre-feet are determined frolll tables 1 through <br />6 of Appendi:x A for various conditions of available flood-control storage <br />space in Lakes Mead and Powell and of D18x:1mum forecasted inflow for <br />Januarl-July , February-July, March-July, etc., respectively. These <br />tables are computed assWDing the follOWing conditions; <br /> <br />a. The follOWing normal reservoir loss rates were used for <br />lake Powell and for lake Mead, between the Grand Csnyon gaging station <br />and Hoover Dam: <br /> <br />\)0 r <br /> <br />9 <br />