RES 00111A - Laserfiche WebLink

Findines: Changes or alterations have been required in, or incorporated into, the Project which avoid or substantially lessen the significant environmental effect identified in the Final EIR to a less than significant level. Facts in Support of Finding: The impact will be avoided or reduced based on the following: a. Specific Plan Storm Drain Policy 2, Guideline 2.3 requires all subdivision improvements, such as storm drain lines, streets, curbs and gutters, channels and culverts and open spaces be designed in a comprehensive manner such that no habitable buildings will be subject to flooding in a 100-yeaz storm event. 3. Fact B4. Development of the Prnject could conflict with implementation of future Zone 7 regional flood control plans for the Arroyo de la Laguna south of the Bernal Avenue bridge. Mitigation Measures: Measure B46. Set back development sufficiently to accommodate a flow of 27,000 efs (with W SEL of 316 feet as illustrated in Figure SH) in a channel widened to the east only; if Zone 7 adopts a Master Plan for regional flood control prior to the submittal of the Project grading plan, adjust setback consistent with that plan. Measure B4c. Coordinate any channel improvement plans undertaken by Zone 7 with the development of the West Parcel, if these improvements can be timed in accordance with the developers' timetable for development of the West Pazcel. Findines: Changes or alterations have been required in, or incorporated into, [he Project which avoid or substantially lessen [he signitcant environmental effect identified in the Final EIR to a less than significant level. Facts in Sunoort of Findine: The impact will be avoided or reduced based on the following: a. The setback of residential development in the West Parcel from the easterly edge of the Arroyo de la Laguna will accommodate flood control improvements to allow flood flow conditions of 27,000 efs and maintain a maximum WSEL of 316 feet at the Bernal bridge. Zone 7 is studying flood control options and has not yet selected a master plan which would resolve the treatment of this reach of the Arroyo. b. Mitigation Measure Bob is incorporated in PUD Condition ,which requires a setback to allow Zone 7 to implement regional flood control improvements within the Arroyo. (See also, Specific Plan Flood Control Policy 1, Guideline L1.)