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<br />• The mining plan for the recharge structure along Hygiene Road indicates that there is <br />' flexibility in the type of construction that can occur, The structure can be a/mpleted to <br />maximize recharge to the ground water system, which will protect wells along H~~giene Road <br />from injury. <br />6.2 Changes to the Alluvial Aquifer -Stream System Relationship <br />• The water budget spreadsheet indicated that changes to the alluvial aquifer -stream system <br />relationship will be slight. Changes in the timing of streamflovv will occur clue to slight <br />changes in the recharge and discharge function of the aquifer. Changes will only occur in <br />timing of streamflows and not in amount of volume; small increases will occur in certain <br />months and small decreases will occur in other months. <br />• These changes will be less than 0.18 cfs and represent less than 0.04 percent of the annual <br />flow in the St. Vrain River. Impacts at this level will not be noticeable in the strum and will <br />' not affect other water rights. <br />• The decreases in the alluvial storage due to removal of portions of the aquifer are offset by <br />' increases in alluvial storage due to creation of unlined ponds. The correct balance of unlined <br />ponds and removed alluvium areas in the future will insure that the stream impacts are <br />negligible. <br />' A plan for augmentation or temporary substitute supply plan will be prepared cvhiclt will <br />replace all depletions caused by the mining operation with historic consumpti•~e use credits <br />from irrigation water rights or with junior storage water rights. <br /> <br /> <br />i <br />1 <br />-36- <br />' 1 6i.~/m/~ lbrrv)rw .l;u,nnb a. hu. <br />