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STATE OF CALIFORNIA DEPARTMENT OF WATER RESOURCES

STATE OF CALIFORNIA DEPARTMENT OF WATER RESOURCES. Floodplain Management Activities Related to Map Modernization March 2007 Ricardo Pineda, PE, CFM, Chief Floodplain Management Branch. CALIFORNIA FLOODPLAIN MAPPING. California faces unprecedented threats from catastrophic flooding

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STATE OF CALIFORNIA DEPARTMENT OF WATER RESOURCES

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  1. STATE OF CALIFORNIADEPARTMENT OF WATER RESOURCES Floodplain Management Activities Related to Map Modernization March 2007 Ricardo Pineda, PE, CFM, Chief Floodplain Management Branch

  2. CALIFORNIA FLOODPLAIN MAPPING • California faces unprecedented threats from catastrophic flooding • We have to improve our understanding of California’s flood risk • Inform public to protect lives and property • Need to update FEMA maps for areas protected by project levees • Support for flood control improvements

  3. CENTRAL VALLEY FLOODPLAIN MAPPING PLAN • Initiating a 5-year, $130 million plan • Approximate study limit boundaries: Tehama in the North Kingsburg in the South • Provide detailed flood mapping analyses for all systems impacting State-Federal Project Levees in the Central Valley • Applicable for NFIP • Foundation for flood hazard communication and all remedial actions

  4. MAJOR SCHEDULE CHECKPOINTS • Initiation… Four 5-year A&E mapping contracts LOA with USACE for hydrology 10-, 50-, 100-, 200-, & 500-year events • At Two Years… Complete Central Valley hydrology First set of mapping data available • At Five Years… Complete all detailed floodplain maps Pending funding, continue mapping other critical areas in the State

  5. DWR FLOODPLAIN MAPPING PROGRAMExecution Structure DEPARTMENT OF WATER RESOURCES MAPPING SUPPORT CONTRACT OVERSIGHT CORPS OF ENGINEERS Central Valley Hydrology CORPS OF ENGINEERS All Hydraulic QA/QC CORPS OF ENGINEERS Geotechnical A&E CONTRACT NO. 1 Upper Sacto River Basin A&E CONTRACT NO. 2 Lower Sacto River Basin A&E CONTRACT NO. 3 Lower SJ River Basin A&E CONTRACT NO. 4 Upper SJ River Basin A&E CONTRACT NO. 5 Map Processing

  6. PROCEDURE MEMORANDUM 34 • Dated August 22, 2005 • Interim Guidance for Studies Including Levees • Must meet Freeboard, O&M, and Stability Requirements (44 CFR 65.10 – Next Slide) • Requires Levee Certification from the Community • Status Pass/Fail

  7. 44 CFR 65.10 NFIP LEVEE DOCUMENTATION REQUIRED • Embankment Protection • Slope Stability • Settlement • Interior Drainage • Freeboard • Closure Structure • Other Site Specific Criteria

  8. PROCEDURE MEMORANDUM 43 What is a Provisionally Accredited Levee? A levee that FEMA has previously credited with providing 1-percent-annual-chance protection on an effective FIRM or DFIRM, for which FEMA is awaiting data and/or documentation that will show the levee’s compliance with Section 65.10 of NFIP regulations.

  9. KEY POINTS – PM 43 • Federal and Non-Federal Levees • Effective FIRM – 100-Year Protection • Supporting Documentation Must Comply with 44 CFR 65.10 Requirements • Possible 24 Month Grace Period • Five Outlined Scenarios in PM 43

  10. SCENARIO A • Non-Federal Levees • Levees not in the Federal Levee System • Effective FIRM – 100-year protection • Section 65.10 Documentation needed • Notification By – FEMA Regional Office • PAL eligibility – YES

  11. SCENARIO B • Project Rating System - Acceptable • Protection has not been shown as inadequate • Levees in the Federal Levee System • Effective FIRM – 100-year protection • Section 65.10 Documentation needed • Notification By – FEMA Regional Office • PAL eligibility – YES

  12. SCENARIO C • Levee rated Fair, Poor, or Unacceptable • USACE RIP status – Inactive • Levees in the Federal Levee System • Effective FIRM – 100-year protection • Section 65.10 Documentation needed • Notification By – USACE, FEMA Reg. Office • PAL eligibility – NO

  13. SCENARIO D • Levees not having 100-year Protection • Levees in the Federal Levee System • Effective FIRM – No 100-year protection • Section 65.10 Documentation not needed • Notification By – Not Applicable • PAL eligibility – NO

  14. SCENARIO E • Inadequate – USACE levee inventory • Levee failed or overtopped • Levees in the Federal Levee System • Effective FIRM – 100-year protection • Section 65.10 Documentation needed • Notification By – FEMA Regional Office • PAL eligibility – NO

  15. RISK NOTIFICATION • Provide Central Valley communities their level of flood risk based on best available information: • DWR/U.S. Army Corps of Engineers studies • FEMA Flood Insurance Rate Map data • Levee maintenance deficiencies • Urges communities to use information to base future land use planning, emergency response plans, and public notification of risk

  16. COMMUNITY INVOLVEMENT IN FLOODPLAIN MAPPING • Scoping Meetings • Studies and Map Production • Community Review and Appeals • Map Adoption

  17. FEMA WEB SITES PROCEDURAL PLANNING GUIDANCE • Levees http://www.fema.gov/plan/prevent/fhm/lv_intro.shtm • Floodplain Managers, Surveyors, Engineers http://www.fema.gov/plan/prevent/fhm/lv_fpm.shtm • Procedure Memorandum No. 43 http://www.fema.gov/plan/prevent/fhm/pl_memo43.shtm • USACE Guidance Document http://www.fema.gov/plan/prevent/fhm/lv_polg.shtm

  18. QUESTIONS? • THANK YOU • Ricardo Pineda, CHIEF • FLOODPLAIN MANAGEMENT BRANCH • DEPARTMENT OF WATER RESOURCES • TELEPHONE (916) 574-0611 • EMAIL rpineda@water.ca.gov

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