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DEVELOPMENT COMMITTEE ER-90-8 PAGE FOUR 16. The route of the access road and bridge through the riparian corridor shall be adjusted to avoid removal of Valley Oak trees and Elderberry plants. 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 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. 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. All details shall be shown on the Grading Plan. It shall be the responsibility of the applicant to install all plants prior to the initiation of the use. The applicant shall be responsible for the maintenance and protection of said plants during the life of the project' s approval. 17 . 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 should be conducted during the nesting season for these birds. Any such raptor nest shall be shown on the Grading Plan. 18. Prior to construction of the access road, a survey shall be conducted for the presence of Delta button celery plants in that portion of the freshwater marsh that would be affected by the access road. If delta button celery is identified in this area, mitigation shall be provided as designated by the USFWS. The survey shall be conducted by a qualified biologist. The location of all identified plants shall be shown of the Grading Plan.