31A - 2100 W. Alton Ave.-YMCA - Laserfiche WebLink

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Erosion refers to the removal of soil from exposed bedrock surfaces by water or wind. The effects of erosion are intensified with an increase in slope, the narrowing of runoff channels and by the removal of groundcover, which leaves the soil exposed. Construction operations for the proposed~project would require the excavation, removal and recompaction of onsite soils, importing of fill material, and grading. The uncovered soils on the pro~ect site could potentially result in erosion and sedimentation impacts to onsite and offsite drainage facilities. This potential impact could increase during periods of rain. To reduce potential erosion impacts to a level considered less than significant, the following mitigation measure shall be implemented. Mitigation Measure Prior to the issuance of a grading permit the applicant shall submit for review and approval a surface drainage/grading plan/erosion control plan, prepared by a registered Civil Engineer, showing the direction and means of flow to adjacent streets. The plan is to include existing and proposed elevations at and adjacent to all property lines. Drainage routed to 'the street must be directed beneath the sidewalk and through the curb. Would the project result in the loss of a unique geological feature? No Impact According to the City's General Plan Land Use Element EIR and the Preliminary Geotechnical Investigation prepared for the Armstrong Ranch Development Project,' the project site does not contain any unique geologic features. Therefore, implementation of the proposed project would not result in adverse impacts to any unique geologic feature. In the project located on strata or soil that is or that would become unstable as a result of the and potentially result in on-or off-site landslide, spreading, subsidence, liquefaction or collapse? unstable project lateral Potentially Significant Unless Mitigation Incorporated 31 .A.