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S. The route of the access road and bridge through the riparian corridor shall be adjusted to avoid removal of valley oak and elderberry. If these species cannot be avoided, a survey shall be conducted by a qualified arborist or biologist once the final alignment of the bridge and access road has been staked. Each valley oak that will be removed shall be mitigated for at a rate of five to one. These replacement trees shall be one to five gallon trees planted along the Mokelumne River, in the area where the existing bridge will be removed, to enhance the riparian vegetation in that area. Drip irrigation shall be provided for the replacement trees for a period of three years. Any elderberry that would be impacted by the bridge and access road shall be relocated within an unimpacted area of the riparian corridor according to USFWS specification. Protective fencing shall be installed around any elderberry in the vicinity of the access road and bridge. 6. Prior to construction of the access road and bridge, a survey shall be conducted by a qualified wildlife biologist to identify any raptor nests in the riparian corridor within 100 feet of the area to be disturbed. If raptor nests are identified in this area, no construction shall be conducted during the nesting season for these birds. 7. Prior to construction of the access road, a survey shall be conducted for the presence of delta button celery in that portion of the freshwater marsh that would be impacted by the access road. If delta button celery is identified in this area, mitigation shall be provided as designated by the USFWS. 8. A mitigation plan shall be developed and submitted to and approved by the County and the California Department of Fish and Game prior to construction which provides for development of wetland habitat to compensate for any of the freshwater marsh that would be impacted by the access road construction. This mitigation shall involve expansion of the existing freshwater marsh and provide for no net loss of wetlands. 9. To reduce the potential for impact to water quality and fisheries from bank erosion, bridge construction shall be conducted to minimize constriction of the channel and prevent a decrease in flood carrying capacity of the Mokelumne River. 10. To mitigate for the impact to riparian habitat along the route of the proposed access road and bridge, disturbed scrub, freshwater marsh north of the Mokelumne River, and grassland with scattered trees in the borrow area the following mitigation shall be provided: On the north side of the Mokelumne River, a 100 foot buffer from the northern edge of the riparian corridor (as defined by the outer canopy edge of the Riparian Overstory) shall be developed to provide additional habitat and screen the riparian corridor from operations at the processing facility and future agricultural activity. This buffer shall extend the length of the area proposed for reclamation north of the river. This buffer shall include preservation of the freshwater marsh area. A revegetation plan utilizing native trees and shrubs shall be developed to provide effective screening from mining and agricultural activities, and enhance wildlife habitat within the buffer zone. This plan shall be