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Grace Le, Redwood City Redwood Shores Levee Certification Proposal September 15,2009 Page 2 ~~ will serve as stand-alone documents, which will become part of each of the three certification submittal packages. 3. The Operations and Maintenance (O&M) Manual prepared by the City of Redwood City will be utilized for both City-certified submittal packages (Redwood City and San Carlos). A new O&M Manual for the County levee segment will be prepared by M&N based on discussions with FAA, FEMA, San Mateo County, and Redwood City. 4. We have assumed that the existing interior drainage system provides the required 100- year level of protection, and mapping will not be needed. Also, that the facilities owned by City of Belmont (Island Park and Belmont Creek) are deemed to be adequate and flood risk evaluation is not needed 5. We assume that evacuation plans, if requested by FEMA, exist on file with the City of Redwood City, or can be prepared as a supplement to this scope of work. 6. One hardcopy and one electronic copy for each of the 3 packages will be provided to the City of Redwood City for distribution and coordination with the other certifying agencies. A detailed scope of work based on guidance issued by FEMA in CFR 65.10 is provided below. Task 1: Coastal Engineering Study The Preliminary Coastal Engineering Assessment Report provided alternative closure concepts around the non-Redwood City levee segments. The report will be updatedlrevised to replace those sections with the current proposed project definition (build up San Carlos levee segment, and describe closure device for County segment). The earlier recommendations to build up the deficient levee segments will be replaced with design information from BKF's bid document package, and the options for a flood wall along Pico Blvd will be replaced with the closure device information for the San Carlos Airport segment (provided earlier as a memo to you). Task 2: Interior Drainage Study An Interior Drainage Study will be prepared by BKF Engineers and will become part of all three Levee Certification packages. The Interior Drainage Study includes the following tasks: 1) Assess System Reliability Existing Lagoon and pump station operating procedures will be reviewed. Meetings will be held with Redwood City staff to discuss Lagoon and Pump Station operation. BKF will discuss starting water levels in the Lagoons, including measures to drawn down storage in anticipation of major storm events. BKF will review the pump station operation and maintenance records and PG&E power supply reliability for the following pump stations: · Lagoon Discharge #1 · Storm Pumps Area A · Lagoon Discharge #3 M:\2009 Proposa/s\09545 Redwood Shores Levee Certification\GLe_Scope_9-14-09.doc