Dennis Flood Map Zoning
Amendment
Some Discussion of the Issues
Some Facts about the Current Maps
• Last revised 1992
• Pre-date most electronic mapping capabilities
• Do not accurately ...
New Maps
• Revision in process since
2009
• Mapping tied to latest GIS
mapping capabilities
• Topography collected by
late...
The Changes
• Maps extend base flood elevations to
appropriate topographical boundaries
The Changes
• Modifies Base Flood Elevation from NGVD29
to NAVD88 a more accurate base elevation
• Elevation 0.0 (NAVD88) ...
90% of Changes are due to extending flood
elevations to appropriate contour
90% of Changes are due to extending flood
elevations to appropriate contour
90% of Changes are due to extending flood
elevations to appropriate contour
90% of Changes are due to extending flood
elevations to appropriate contour
90% of Changes are due to extending flood
elevations to appropriate contour
90% of Changes are due to extending flood
elevations to appropriate contour
Ultimately the new flood maps will better reflect
hurricane storm surge
Putting it Into Perspective
• In 1944, 238 residences in Dennis were
destroyed and an additional 3,898 structures
damaged
...
Why We Need to Adopt These Maps
• Maintain Dennis Eligibility for National Flood
Insurance Program (NFIP)
• Loss of NFIP e...
Why We Need to Adopt These Maps
• Non-federally backed mortgage companies
will still require some form of flood insurance
...
Why We Need to Adopt These Maps
• Town will become ineligible for disaster relief
spending such as has gone to Dr. Bottero...
A SIDE NOTE ON NATIONAL FLOOD
INSURANCE PROGRAM CHANGES
“The insurance
pool doesn’t just
insure that your
house can be
rebuilt Mary, it
helps Mr. Jones
and Mr. Smith
here too. We...
Flood Insurance in Perspective
• 1,133 policies issued in Dennis
• $245,632,900 total premium value
• $1,312,095 in annual...
Flood Insurance in Perspective
• It would take NFIP minimum of 187 years to
recover damages occurring in a 100 year (1%)
s...
Flood Insurance in Perspective
• Congress has adopted guidance calling for an
average policy cost cap of 1% of premium
val...
Flood Insurance in Perspective
• HR 3370 provides properties newly mapped to
acquire Preferred Risk Policies prior to July...
More information at:
HR 3370 Discussion
http://dennismaplanningdept.wordpress.com/
Flood Maps Online
http://www.mapsonline...
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Dennis Flood Map Zoning Amendment Discussion

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A discussion of the pending flood zone updates for the Town of Dennis and why they are important

Published in: News & Politics
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Dennis Flood Map Zoning Amendment Discussion

  1. 1. Dennis Flood Map Zoning Amendment Some Discussion of the Issues
  2. 2. Some Facts about the Current Maps • Last revised 1992 • Pre-date most electronic mapping capabilities • Do not accurately reflect topography • Provide a false sense of security for home owners
  3. 3. New Maps • Revision in process since 2009 • Mapping tied to latest GIS mapping capabilities • Topography collected by latest LIDAR technology • Maps better reflect historic flood patterns
  4. 4. The Changes • Maps extend base flood elevations to appropriate topographical boundaries
  5. 5. The Changes • Modifies Base Flood Elevation from NGVD29 to NAVD88 a more accurate base elevation • Elevation 0.0 (NAVD88) is about 0.94 ft higher than it was in 1929 (NGVD29). • In most cases old flood elevation 11 (for instance) is now new flood elevation 10. • Old flood elevation 11 that remain 11 equals a 1 foot increase in water levels.
  6. 6. 90% of Changes are due to extending flood elevations to appropriate contour
  7. 7. 90% of Changes are due to extending flood elevations to appropriate contour
  8. 8. 90% of Changes are due to extending flood elevations to appropriate contour
  9. 9. 90% of Changes are due to extending flood elevations to appropriate contour
  10. 10. 90% of Changes are due to extending flood elevations to appropriate contour
  11. 11. 90% of Changes are due to extending flood elevations to appropriate contour
  12. 12. Ultimately the new flood maps will better reflect hurricane storm surge
  13. 13. Putting it Into Perspective • In 1944, 238 residences in Dennis were destroyed and an additional 3,898 structures damaged • Only 1,133 structures are currently insured or ¼ of the number damaged in 1944 • The new maps will place about 5,000 structures into the flood zone • Dennis has added 11,000 homes since 1950
  14. 14. Why We Need to Adopt These Maps • Maintain Dennis Eligibility for National Flood Insurance Program (NFIP) • Loss of NFIP eligibility will eliminate federally backed mortgages within the flood zone. • Over 5,000 properties may be unable to attain conventional financing
  15. 15. Why We Need to Adopt These Maps • Non-federally backed mortgage companies will still require some form of flood insurance • Private flood insurance will cost more than NFIP backed insurance.
  16. 16. Why We Need to Adopt These Maps • Town will become ineligible for disaster relief spending such as has gone to Dr. Bottero Road and elsewhere. • Town will become ineligible for pre-disaster relief spending such as is available from time to time to assist in making homes flood zone compliant
  17. 17. A SIDE NOTE ON NATIONAL FLOOD INSURANCE PROGRAM CHANGES
  18. 18. “The insurance pool doesn’t just insure that your house can be rebuilt Mary, it helps Mr. Jones and Mr. Smith here too. We all pay into the NFIP to be sure we all have the funds to rebuild later.”
  19. 19. Flood Insurance in Perspective • 1,133 policies issued in Dennis • $245,632,900 total premium value • $1,312,095 in annual payment to NFIP • Average Premium Value $216,799 • Average Policy Payment $1,158 Source: http://bsa.nfipstat.fema.gov/reports/1011.htm#MAT
  20. 20. Flood Insurance in Perspective • It would take NFIP minimum of 187 years to recover damages occurring in a 100 year (1%) storm • Since 1976 NFIP has paid out $1,450,308 in damages ($38,166/year) • Annual average payouts extend NFIP risk recovery to 192 years Source: http://bsa.nfipstat.fema.gov/reports/1040.htm#25
  21. 21. Flood Insurance in Perspective • Congress has adopted guidance calling for an average policy cost cap of 1% of premium value, in Dennis this would mean $2,167 average insurance costs • Guidance would mean a $1,010 average increase phased in over several years • Average annual premium increase would be $208 at the 18% maximum cap ($173 increase at the average recommended increase of 15%)
  22. 22. Flood Insurance in Perspective • HR 3370 provides properties newly mapped to acquire Preferred Risk Policies prior to July 16 • Preferred Risk Policies can be acquired for $460 for $250,000 coverage for two years. • Policy costs will increase by 18% annually thereafter until full risk
  23. 23. More information at: HR 3370 Discussion http://dennismaplanningdept.wordpress.com/ Flood Maps Online http://www.mapsonline.net/dennisma/dennisfema2013.html#

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