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8.2 Hydrology and Water Ouality <br /> Mitigation 1. - The potential for change in channel alignment, although insignificant, <br /> should be reduced in case of a levee failure during peak streamflow events. The gravel <br /> extraction pits shall be left open for as brief a time as possible, particularly during the <br /> rainfall season, and the pits shall be aligned perpendicular to the streamflow. <br /> Implementation Responsibilities: <br /> -Applicant submits a plan to the County Building Department identifying orientation <br /> of the excavation pits and methods to minimize the pit area left open. <br /> -County either approves the plan or requires modifications. <br /> -Applicant implements approved plan. <br /> Schedule: <br /> -The plan shall be submitted and approved along with the project grading plan. <br /> Monitoring: <br /> -County shall periodically inspect the site to ensure that excavation is conducted <br /> according to the approved plan. <br /> Mitigation 2. - The new bridge site shall be constructed so as to minimize constriction <br /> of the channel and prevent a decrease in flood carrying capacity of the Mokelumne <br /> River that may increase erosion and flood potential. The San Joaquin County Public <br /> Works Department and the State Reclamation Board should require the cross sectional <br /> area of the channel at the new bridge site to be surveyed to determine that the present <br /> channel capacity has not changed since the USGS report. A permit from the State <br /> Reclamation Board will be required for relocation of the bridge. The bridge relocation <br /> must also comply with requirements of the Federal Emergency Management Agency and <br /> the San Joaquin County Flood Prevention Ordinance. <br /> 119 <br />