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com~ebensive manner such that no habitable buildings will be subject to flooding in a <br />100-year storm event. <br /> <br />3. ~. Development of the Project could conflict with implementation of <br />future Zone 7 regional flood control plans for the Arroyo de la Laguna south of the <br />Bernal Avenue bridge. <br /> <br />Measure B4b. Set back development sufficiently to accommodate a flow of 27,000 els <br />(witbWSEL of 316 feet as illustrated in Figure 8H) in a channel widened to the east <br />only; if Zone 7 adopts a Master Plan for regional flood control prior to the submittal of <br />the Project grading plan, adjust setback consistent with that plan. <br /> <br />Measure B4c. Coordinate any channel improvement plans undertaken by Zone 7 with <br />the d~velopment of the West Parcel, if these improvements can be timed in accordance <br />with the developers' timetable for development of the West Parcel. <br /> <br />Findings: Changes or alterations have been required in, or incorporated into, the <br />Project which avoid or substantially lessen the significant environmental effect <br />identified in the Final EIR to a less than significant level. <br /> <br />Facts in Sunoort of Findinit: The impact will be avoided or reduced based on the <br />following: <br /> <br /> a. The setback of residential development in the West Parcel from the easterly <br />edge of the Arroyo de la Laguna will accommodate flood control improvements to <br />allow flood flow conditions of 27,000 cfs and maintain a maximum WSEL of 316 feet <br />at the Bernal bridge. Zone 7 is studying flood control options and has not yet selected <br />a master plan which would resolve the treatment of this reach of the Arroyo. <br /> <br /> b. Mitigation Measure B4b is incorporated in pUD Condition , which <br />requires a setback to allow Zone 7 to implement regional flood control improvements <br />within the Arroyo. <br /> <br /> c. The Cooperative Plan bypass proposal has been eliminated as part of the <br />Cyreenbriar project. <br /> <br />4. Impact BS. Potential for degradation of surface water quality. <br /> <br />Measure B5a. Develop a stormwater quality management program. <br /> <br />Measure B5b. Prepare a water quality management plan for parks. <br /> <br />6 <br /> <br /> <br />