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<br /> <br />by the relatively impermeable Pierre Shale; lateral movement <br />of ground water is controlled by the head differences between <br />the irrigation ditches to the west and the Poudre River to <br />the east. Water movement in the sand and gravels is generally <br />to the southeast towards the Poudre River and downstream. <br />Recharge to the aquifer is partially from precipitation and par- <br />tially from seepage from the bottom and sides of the Fossil Creek <br />Reservoir feeder ditch and the Boxelder Ditch during the irriga- <br />tion season. Discharge from the aquifer occurs in the form of <br />base flow to the Poudre River and evaporation from small lakes <br />and gonds in the vicinity. Consequently, historic water levels <br />will be highest during the irrigation season and lowest in the <br />winter and early spring months. <br />Average water level drawdowns of 10 feet will occur adjacent to <br />the dewatering trenches. Drawdowns will extend approximately <br />1,000 feet, diminishing with distance from the trenches. The <br />Poudre River acts as a hydrologic barrier, so the effect of <br />dewatering operations on one side of the river will not extend <br />to the other. <br />The greatest potential impact from dewatering will be to the well <br />in the NE; of the NEa of Section 33, south of the Baumgartner <br />property. The average water level in this well may be lowered <br />by mining at Baumgartner about 2.2 feet. Other wells may be <br />impacted by mining at Baumgartner including the ones which may <br />G-7 <br />