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I I I I I I I I I I I I I I I I I I I March 1996 Final water, is a net depletion of 3,712 acre-feet (-1 ,353 - 2,530 + 171), or 8.75 cfs when spread over the April-through-October period. As discussed previously, not all the well depletions in these two river segments will require replacements to Colorado surface rights. This is because the Buffalo Canal is frequently satisfied with the river flow at its diversion facilities without calling against upstream rights. When this condition exists, the well depletions affect either the X-V water rights or Usable State line Flow. LA WMA can replace the well depletions to the Buffalo Canal on days when it is calling by releasing 8.75 cfs of account water to the river. Assuming the Buffalo would call on a total of 30 days, the total amount of this release would be 521 acre- feet. With this further release of account water, the total net depletion in the two river segments between the Lamar and Buffalo headgates is reduced to 3,191 acre-feet. Since LAWMA will control the X-V and Manvel waters and since the water available under these two rights will be measured at the Granada gaging station, LA WMA would automatically replace the well depletions to the X- Y and Manvel water rights by having the yield to them reduced. Well depletions not affecting the Buffalo, X-V, or Manvel water rights affect Usable Stateline Flow and are included in that accounting. Analyses made with the H-I Model indicate that Usable Stateline Flow increases by an average of 46.55 acre-feet for each 100 acre-feet of additional water diverted into the Buffalo Canal. This relationship was used in calculating the increases in Usable Stateline Flow from these replacement deliveries. Buffalo to Stateline. Since well depletions in this river segment affect only the Usable Stateline Flow, only this accounting is shown. The depletions to Usable Stateline Flow were estimated to average 7,976 acre-feet annually during 1990-94 as discussed previously. The replacement deliveries made for Colorado surface rights will reduce the depletion flow by an estimated 1,4,20 acre-feet annually, leaving 6,556 acre-feet to be replaced. Using the actual diversions into the X- Y Ditch during 1990-94, the X- Y rights would have provided 4,341 acre- feet of consumptive use water under this augmentation proposal, exclusive of the water in the X- Y Graham Account. The Stubbs direct flow right would have provided 380 acre-feet 21