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• ~'p~ \i~~. ~~ • • VIII. IXHBIT G -WATER INFOKMAT[ON Introduction f The proposed mining operation is located in the alluvial plain of Boulder Creek. The alluvial deposit averages approximately 16 feet in thickness. The mining of sand and gravel will necessitate ~~ dewatering the alluvial aquifer in the vicinity of the pit. ~_- The potential exists for impacting the ground water levels in the immediate vicinity of the excavation. ~~ Water levels in the aquifer aze expected to decline. However, the operation is not expected to materially injure ground water rights. It is anticipated that the water wells in the azea will be able to withdraw their permitted amounts. Suitable mitigation procedures will be instituted if water rightsar~e}.~-~„~ materially injured. The water wells, and surface water features in the site vicinity are shown on " "~~`/~ ` ,~. ~' ne Figure C-1, Exhibit C - Premining Plan. ~• '.~~ c Surface Water Svstem The proposed mining operation is located between Boulder Creek and Idaho Creek, a vibutazy of -~ Boulder Creek. The property lies in the 100 year floodplain of Boulder Creek. The azea historically consisted of farmland irrigated by ditches diverting water from Boulder and Idaho creeks. Presently the farmland is interspersed with other sand and gravel mining operations. Immediately east of the Cooley property is a mined and reclaimed pit containing an open lake. Smaller gravel mines lie immediately south of the property, A relatively lazge, active pit lies northwest of the site across Boulder Creek. The on-site surface water features consist of four small ponds which historically collected tailwater ..__.. fr~tgation. Irrigation water was delivered by laterals of the Smith and Emmons ditch which are located on the southern boundary of the property. The property is currently leased for pasture and grazing and about half the property is irrigated from this ditch. 18 /"l~~