flood study oswego county, ny fema region ii february 7, 2011
TRANSCRIPT
FLOOD STUDYOswego County, NYFEMA REGION IIFebruary 7, 2011
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Agenda
Introductions and Roll Call
Objectives
Map Modernization (MapMod) Program Overview
Oswego County MapMod Update
Milestones
Questions & Feedback
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Introductions and Roll Call FEMA Region II
Senior Engineer: Alan Springett
Project Officer: Paul K. Weberg, PE
Communications / Outreach Support: Adie Koby
Floodplain Management and Insurance Lead: Pat Griggs & Kim Rizzo
RSC Deputy Coordinator: Tolga Yilmaz, CFM, GISP
RSC Outreach Lead: Crystal Smith, CFM
State – New York State Department of Environmental Conservation (NYSDEC)
Floodplain Management Section Chief: William Nechamen, CFM
Environmental Engineer: Kelli Higgins-Roche, CFM
Mapping Partner – Lenord & Jackson AssociatesProject Manager: Bhavin Gandhi, PE, CFM
Local - Oswego County & Communities
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Objectives
Objectives
• To provide an overview of Oswego County’s flood hazard mapping project status
• To promote community engagement and enhance capability to effectively manage flood risk
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Map Modernization (MapMod) Program Overview Prior to 2003, more than 70 percent of the nation’s
flood maps were at least 10 years old. In Oswego County, with few exceptions, the communities' flood maps dated back to the 1980s
Congress appropriated funds in 2003 and directed FEMA to develop and implement the MapMod program, which:
• Created county-wide digital maps
• Utilized more current data to update maps
• Developed a new platform to convert from paper to digital format
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Oswego County MapMod Update Scope of Oswego County study
• County-wide DFIRM (168 panels), including 34 incorporated communities
• Re-delineation of 173 miles of detailed studies (Rivers & Lakes) Re-delineation: Previously identified floodplains and associated detailed flood elevations paired with
updated topographic data (LIDAR) that retains the integrity of the existing Engineering analysis
• Analysis of 960 approximate stream miles Approximate Stream: Hydrology was performed using NED dataset and 2006 USGS regression
equations. Hydraulics analysis and mapping was performed using LiDAR data and HECRAS Models.
• The DFIRM and FIS report will be produced in the
FEMA Countywide format in the
North American Vertical Datum of 1988 (NAVD88) NAVD 88 = NGVD 29 – 0.55 feet
• Preliminary DFIRM delivery scheduled for February 11, 2011
894’NAVD 88
894.55’NGVD 29
Elevation in NGVD 29
Elevation in NAVD 88
896’NAVD 88
896.55’NGVD 29
Datum Conversion from Oswego County
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Oswego County-wide Paneling Scheme
• Some of the communities that did not have mapsmight get new maps with special flood hazard zones• Some of the communities may be covered with more than one panel•Paneling scheme createdfrom 1:24,000 USGS quads
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On February 11, 2011 each community will be receiving: Preliminary Flood Insurance Study (FIS) report Preliminary Paper Flood Insurance Rate Maps (FIRMs) DVD containing digital FIRM & FIS & fact-sheet and
geographic information system (GIS) data: GIS viewer and preliminary shapefiles
Roles & Responsibilities of Local CommunitiesRoles & Responsibilities of Local Communities:: Review & Comment on these preliminary FIRMs & FIS – due
end of March FEMA & NYSDEC will be conducting CCO meetings early
spring Flood Risk communications with residents
Local Communities
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Milestones May 2007: Oswego County scoping meetings
Fall 2008: Oswego County-wide Flood Insurance Study/Flood Insurance Rate Maps funded
February 11, 2011: Preliminary Oswego County Flood Maps delivered
Early Spring 2011: CCO meetings with the community officials followed by Open House meetings
Spring 2012: Letter of Final Determination (LFD)
Fall 2012: Effective Flood Maps delivered
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Post-Preliminary Process
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Mitigation Plan in NY Update
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Resources
FEMA: www.fema.gov
Floodsmart, the official site of the National Flood Insurance Program (NFIP): www.floodsmart.gov
Risk Assessment, Mapping and Planning Partners: www.RAMPP-team.com
NFIP Reform: www.fema.gov/business/nfip/nfip_reform.shtm
New York State - NFIP Coordinator
New York State Office of Emergency Management
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Questions & Feedback www.RAMPP-TEAM.com: PowerPoint Presentation & additional information will be posted
Contact Information
FEMA Region II
Paul Weberg Pat Griggs
26 Federal Plaza, 212-680-8523
New York, NY 10278 [email protected]
212-680-3638
New York State Department of Environmental Conservation (NYSDEC)
William Nechamen, CFM Kelli Higgins-Roche, CFM
518-402-8146 518-402-8143
[email protected] [email protected]
LJA - Mapping Partner
Bhavin Gandhi, PE, CFM
845-354-4382