RES 00114A - Laserfiche WebLink

Mitigation Monitoring and Reporting Program d. Infrastmcmre Systems: Drainage Page 13 INFRASTRUCTURE SYSTEMS: DRAINAGE Mitigation Measure: B2. (Optiooaq Investigate feasible measures to protect the site from Hood flows ie excess of the FEMA 100-year storm event in a ~.. manner consistent with feasible grading options and which does sot place existing development on the west side of the Arroyo at '~, risk of a FEMA 500-year flood. i Flooding in excess of the FEMA 100-year flood is not considered a significant project impact, and miti- gation of the impacts of those floods is optional. Because there are d~erenees of opinion on the ques- tion of future flow volume under the 100-year storm event, and because these d~erenees include condi- tions under which 100-yearJ[ows would create out-of-bank conditions, the project may choose to imple- ment a mitigation option lha7 responds to Impact 82. impact to be Mitigated: The site under its current condition has a potential for flooding when flood flows exceed the PEMA 100-year flood event. Agency/Individual Responsible for Implementation: Site developer of the West Parcel Implementation Timing: Prior to grading of [he West Parcel Mitigation Specifications: If development on the site proceeds before a regional flood control plan is approved by Lone 7 and other responsible ¢gencies, then site developer shall incorporate into any plan for development of its site provisions to protect habitable buildings on the West Parcel against the (remote) possibility of a 25,500 cfs flood flow (which is the flood flow estimate most recently provided by Zone 7). This strategy is reflected in the preliminary grading plan for the Project, and is further set forth in the PUD Plan. City staff will review the final grading plan for the West Parcel, and conform the grading plan with Zone 7 analysis Ageocy/Individual Responsible for Monitoring: City of Pleasantoq Public Works Department Action by Monitor: Review and approve plan to provide protection from the 25,500 cfs storm event. Monitoring Timing: Prior to approval of a grading plan Fnr the West Parcel Monitor: Completion Date: Signature: