Author Topic: FEMA Advisory Base Flood Elevation Maps  (Read 1301 times)

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Offline NJ Longboarder

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FEMA Advisory Base Flood Elevation Maps
« on: December 15, 2012, 12:29:26 PM »
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  • Below is a link to the Advisory Base Flood Elevation (ABFE) Maps published this morning.  This will be standard for rebuilding until the final FIRM maps are complete late summer 2013.  The FIRM map formal approval process should take about a year, so most towns will follow the ABFE until late 2014.  The ABFE should be slightly higher, so if you build to that elevation you should be fine when the FIRM Maps come out.

    http://fema.maps.arcgis.com/home/webmap/viewer.html?webmap=2f0a884bfb434d76af8c15c26541a545

    Edit:  Looks like the ABFE for New York aren't posted yet.  Probably in the next week or two. 

    Offline jerseysurfer

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    Re: FEMA Advisory Base Flood Elevation Maps
    « Reply #1 on: December 15, 2012, 09:29:46 PM »
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  • Very cool. How do you read interpet this map? What does the 1%el 9 mean or the %0.2 el 11 mean?

    Offline chuzzlewit

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    Re: FEMA Advisory Base Flood Elevation Maps
    « Reply #2 on: December 17, 2012, 05:52:30 PM »
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  • Very cool. How do you read interpet this map? What does the 1%el 9 mean or the %0.2 el 11 mean?

    1% el 9' means that the 100 year storm surge has been adjusted to 9' above NAVD88
    .2% el 11' means the same thing for 500 year projection

    it is not known if these heights will become official on FEMA insurance maps. whatever heights do, they will be used (along with redrawn zone designations - AE, V, etc.) in shaping local building code ordinances and real estate and insurance numbers for the affected areas. the changes appear to be fairly significant, as you may expect.

    link to the zone classifications: http://www.fema.gov/national-flood-insurance-program-2/flood-zones

    no idea what is going to happen in the more metropolitan areas - as you can see on the big map, they haven't touched those yet.
    « Last Edit: December 17, 2012, 06:03:45 PM by chuzzlewit »

    Offline chuzzlewit

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    Re: FEMA Advisory Base Flood Elevation Maps
    « Reply #3 on: December 17, 2012, 06:02:15 PM »
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  • a quick example -
    working on a project in NJ that is covered by the new release maps.
    the old FEMA said we were in zone AE  el5'
    we were planning on raising the building to the local ordinance which was FEMA +1' = raising the building 3.5'
    now on Saturday's new map, the building is in zone V el10' - this means raising the structure 5 additional feet(!) and designing the foundation for wave action reinforcement (!$!)


    this is huge - and there's nothing to say that local ordinances couldn't require even more structure, or forbid construction in that zone outright.

    i don't even know what the insurance repercussions might be...

    Offline jerseysurfer

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    Re: FEMA Advisory Base Flood Elevation Maps
    « Reply #4 on: December 18, 2012, 09:18:20 PM »
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  • Thank you for the answer. Was looking at the new map for friends of mine who live along the Shresbury river in towns like Oceanport,Little Silver, Monmouth Beach, Long Branch. The new flood map is dead on, all the places in the new flood zone were hammered.
    Look at my mothers house in Long Beach Island, with the new map. She, just by luck, happen to buy a house 10 years ago that had been raised 44 inches up. She survived fine, water from the bay came up 36 inches from looking at the water line on the pilings, garage was flooded. Her neigbors did not fare well. This map must have people on LBI wondering if its worth living on a barrier island.