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<br />I Mesa and Powell). <br /> <br />The algorithm contains the term mppStorage, equal to 5.179 MAF, which ensures that the 602(a) <br />storage protects the minimum power pools of the Upper Basin reservoirs Powell, Flaming Gorge, <br />Blue Mesa and Navajo. <br /> <br />The table below shows the live and inactive capacity storages for the reservoirs included in the <br />602(a) storage. <br /> <br />Storage (MAF) <br />Powell <br />Flaming Gorge <br />Navajo <br />Blue Mesa <br /> <br /> <br />IfI.~~ly. <br />3.995 <br />0.2335 <br />0.61482 <br />0.082 <br /> <br />Note that inactive capacity storages sum to about 4.925 MAF, a 0.254 MAF difference compared <br />to the value used in the algorithm. The algorithm value, 5.179 MAF was determined many years <br />ago and was probably based on different capacity curves. <br /> <br />In this document the 602a storage that protects Powell's minimum power pool is denoted as <br />602aProtect, the 602a storage that does not protect Powell's minimum power pool is denoted as <br />602aNoProtect. The 602aProtect is the 602a storage that has been used in CRSS for many <br />years. <br /> <br />1. Powell Portion of 602a Storage with Power Pool Protection <br /> <br />Actual reservoir storages are used for simulation during the modeling. However, for the purposes <br />of this discussion we are assuming the Upper Basin reservoirs above Powell (Flaming Gorge, <br />Navajo and Blue Mesa) are full in order to compute the minimum storage necessary in Powell to <br />meet 602aprotect. <br /> <br />PowellProtect = 602aProtect - (Fla min gGorge + BlueMesa + Navajo) LiveCapacity <br /> <br />2. Powell Portion of 602a Storage with No Power Pool Protection <br /> <br />To compute the 602a storage requirement that does not protect the minimum power pool at <br />Powell mppStorage in the 602a storage algorithm is corrected for Powell's minimum power pool. <br />The power pools of the upstream reservoirs are preserved to maintain the future capability of their <br />operation (check with Tom). The correction is made by subtracting Powell's inactive storage from <br />5.179 MAF. Thus, <br /> <br />mppStorageNoProtect = 5. 179MAF -3.995MAF = 1.184MAF <br /> <br />mppStorageNoProtect is substituted for mppStorage in the 602a algorithm to compute 602aNoProtect. <br />The minimum storage required in Powell, assuming full Upper Basin reservoirs above, is then <br />calculated as: <br /> <br />Powell No Protect = 602a No Protect - (Fla min gGorge + BlueMesa + Navajo) LiveCapacity <br /> <br />9-19-05 <br /> <br />DRAFT <br /> <br />Reclamation <br /> <br />