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Flood Mitigation Plan

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Flood Mitigation Plan Flood Mitigation Plan (June 2008) CITY OF NOVATO FLOOD MITIGATION PLAN CITY OF NOVATO FLOOD MITIGATION PLAN ........................................................ 2 SECTION I - PLANNING PROCESS ......................................................................... 17 Part 1 - Process Organization .................................................................................................................................... 17 Planning Process Documentation ............................................................................................................................. 17 Jurisdictional Participation ........................................................................................................................................ 17 Process Description ................................................................................................................................................... 18 Part 2 - Public Outreach ............................................................................................................................................. 22 Flood Mitigation Planning Committee .................................................................................................................... 22 Public Participation Methodology ............................................................................................................................ 48 Results and Recommendations from Community & Stakeholders ........................................................................ 48 Part 3 - Coordination with Other Agencies ............................................................................................................. 49 County of Marin ........................................................................................................................................................ 49 Marin County Flood Control & Water Conservation District ................................................................................ 50 Marin Municipal Water District ............................................................................................................................... 54 North Marin Water District ...................................................................................................................................... 56 Novato Sanitary District ........................................................................................................................................... 57 Marin Association of Realtors .................................................................................................................................. 58 City of Novato Fire Protection District .................................................................................................................... 59 SECTION II - RISK ASSESSMENT ...........................................................................62 Part 4 - Hazard Assessment ....................................................................................................................................... 62 Flood Area ................................................................................................................................................................. 63 Maps .......................................................................................................................................................................... 75 Updates to the City of Novato Repetitive Loss Plan ............................................................................................... 83 Existing Plans .......................................................................................................................................................... 116 Part 5 - Problem Assessment ................................................................................................................................... 210 Summary of Flooding Vulnerability & Impact ..................................................................................................... 210 SECTION III - MITIGATION STRATEGIES ............................................................ 219 Part 6 – Goals ............................................................................................................................................................. 219 Part 7 - Possible Activities ........................................................................................................................................ 220 Natural Resource Protection ................................................................................................................................... 221 Part 8 - Action Plan ................................................................................................................................................... 225 Ongoing Programs & Actions ................................................................................................................................ 225 Marin County Flood Control District ..................................................................................................................... 228 City of Novato Mitigation Strategies ..................................................................................................................... 254 SECTION IV - PLAN MAINTENANCE .................................................................... 261 Part 9 - Plan Adoption .............................................................................................................................................. 261 Part 10 - Implementation, Evaluation and Revision ............................................................................................ 262 CITY OF NOVATO FLOOD MITIGATION PLAN PAGE 1 CITY OF NOVATO FLOOD MITIGATION PLAN City of Novato Flood Mitigation Plan Executive Summary The City of Novato’s All Hazard Disaster Mitigation Plan (DMA 2000), which is completed, includes a mitigation strategy to review and update the City of Novato’s Flood Hazard Mitigation Plan. These two plans are closely tied together. The City plans to incorporate the two hazard mitigation planning processes together for the information to be efficiently utilized between the two documents avoiding duplication of effort and research and demands on staff time. CITY OF NOVATO FLOOD MITIGATION PLAN PAGE 2 CITY OF NOVATO FLOOD MITIGATION PLAN In support of the City’s hazard mitigation efforts the State of California Office of Emergency Services has made FEMA-FMA non-competitive grant money available to the City to update their Flood Mitigation Plan. CITY OF NOVATO FLOOD MITIGATION PLAN PAGE 3 CITY OF NOVATO FLOOD MITIGATION PLAN The City has conducted a public outreach program to all citizens in danger of flooding within the City inviting their participation and input into the flood mitigation plan. This outreach had a goal to reach 90% or more of all of the properties. The City utilized public mailings, meetings and public service announcements to accomplish this outreach. The City has identified, as part of this program, locations where the public can obtain flood information, such as the Public library and City departments. The results of the public outreach program are included in this Plan The City intends to continue working relationships and coordination with Marin County, The Marin County Flood Protection & Water Conservation District, the Marin Municipal Water District, North Marin Water District, Novato Sanitary District, the Marin County Association of Realtors, the Novato Fire Protection District, State and Federal Agencies with authorities and participation programs as well as any other interested stakeholders, including transportation and law enforcement organizations and affected citizens. The Plan includes an inventory of the flood hazard areas, the identification of structures within those areas and a damage cost estimate or risk loss to those properties in a 100 year flood event. This data will allow the City to accurately assess the cost benefit analysis of flood mitigation strategies. The City formed a Flood Mitigation Planning Committee with the Public Works Department as chair of the Planning the committee. This group will have an ongoing relationship with the public and the stakeholders to formulate and update this plan on an annual basis. The Plan identifies historic and future flooding problems and ongoing flood studies, mapping and research. The Plan reviews the City’s 2003 Elevation Certificate to determine if there has been new construction or substantial improvements within the special flood hazard area. The City will endeavor to update the Elevation Certificates as required. The City will continue its program of sending letters to insurance agents, real estate agents and mortgage lenders making sure they are aware of the elevation certificates. The City conducts on-going reviews of building and codes standards and floodplain ordinances to affirm the most recent practices are reflected. The City continues to review and update its GIS mapping system including the floodplain areas, and exploring additional uses for the system to support flood mitigation. The City has updated its Master Plan Storm Water Questionnaire and update where appropriate as part of the planning process. The process has also included reviewing drainage system maintenance and capital improvement reviews for update. It is the intent of this Plan to include a methodology to identify and update the City's hotspot
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