Coastal Lane County Flood Study Coastal Lane County Flood Study - - PowerPoint PPT Presentation
Welcome to the Open House for the Welcome to the Open House for the Coastal Lane County Flood Study Coastal Lane County Flood Study September 18, 2018 September 18, 2018 Sch chedule le Sc Sched edule le 4: 4:00 00 Do Door ors s Op
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in the cities of Dunes City, Florence and in Lane County
States, yet is highly predictable
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Reduce Economic Loss Caused By Flood Events
standards
control
increasing resilience
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Flood Risk Nationally
Billion per year
year
*From January 1978 – July 2018
NFIP DATA (As of July 31, 2018)
JURISDICTION POLICIES IN FORCE INSURANCE IN FORCE WRITTEN PREMIUMS IN FORCE NUMER OF PAID LOSSES* PAYMENTS MADE* Dunes City 8 $2,105,000 $11,497 $0 Florence 153 $43,698,800 $79,841 3 $59,527 Lane County 2081 $494,155,400 $1,879,786 261 $3,175,459
https://bsa.nfipstat.fema.gov/reports/1011.htm#ORT https://www.fema.gov/policy-claim-statistics-flood-insurance
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PRESIDENTIAL DECLARATION YEAR PROJECT FUNDING FEMA SHARE 4296-DR 2017 $15,004,377 $11,505,443 4258-DR 2016 $2,278,429 $1,728,742 4169-DR 2014 $6,761,708 $5,169,277 4055-DR 2012 $1,387,681 $1,040,761 1510-DR 2004 $951,637 $713,760 1405-DR 2002 $3,904,645 $ 2,928,563 Totals $30,288,477 $ 23,086,546
FEMA Public Assistance – Lane County
https://www.fema.gov/openfema-dataset-public-assistance-funded-projects- details-v1
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http://photos.oregonlive.com
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frequencies for Zone A streams
approximate analysis for Zone A streams
coast for Zone VE and V
approximate-based BFE
remap floodplains using effective BFEs and LiDAR terrain data
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Millions of laser measurements are made from a precisely located aircraft, producing a 3D map of the earth’s surface as a “point cloud”
Some laser pulses make it through the trees Laser pulses do not penetrate water
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Image Credit: DOGAMI
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Image Credit: DOGAMI
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Image Credit: DOGAMI
mapping coastal flood zones;
measurements;
structures;
lidar)
Damage from storm waves during a “moderate” event at Neskowin, Tillamook County. Erosion north of Hunter Creek, Gold Beach. Overtopping at Garrison Lake, Port Orford during a major storm on February 16, 1999.
Photo Credit: Unknown Photo Credit: DOGAMI Photo Credit: DOGAMI
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Step 1: Offshore Water Step 2: Offshore Waves
Statistical analysis of NOAA
to transform to nearshore (DOGAMI & OSU)
Step 3: Nearshore Wave Setup, Runup & Overtopping
Bathymetric survey (OSU); transect surveys and hydraulic calculations (DOGAMI)
Step 4: Floodplain Mapping
GIS mapping (DOGAMI)
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Image Credit: DOGAMI Photo Credit: DOGAMI
57 transects surveyed from the Suislaw River north to Lincoln County
Figure Credit: Modified from Hedges and Mase, 2004
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Image Credit: DOGAMI Photo Credit: DOGAMI
Elemen ent Approxi ximat mate
CROSS- SECTIONS Extracted completely from Light Detection and Ranging (LiDAR)
Regional Regression
(HEC-RAS)
Inventory) LiDAR Survey
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VE, or V)
% Water Surface Elevation)
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% Water Surface Elevation)
VE, or V)
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Comparison (Swipe Feature): http://arcg.is/yqiPy Risk Assessments: http://arcg.is/14mjy5 FEMA’s Flood Map Change Viewer on FEMA.gov
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Coastal Lane County
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PUBLIC MEETING SEPTEMBER 18, 2018 90-DAY APPEAL PERIOD
STARTS SHORTLY AFTER THE PUBLIC MEETING
NOVEMBER 2018 TO FEBRUARY 2019 FEMA ISSUES LETTER OF FINAL DETERMINATION
3-6 MONTHS FOLLOWING THE END OF THE APPEAL PERIOD. DEPENDENT ON COMMENTS AND APPEALS RECEIVED.
SUMMER 2019 EFFECTIVE DATE
6 MONTHS AFTER LFD
WINTER 2019/2020 Flood Risk Review Meeting for Community Staff
August 6, 2016
Appeal Period
November 2018 thru February 2019
FEMA issues LFD
Summer 2019
Effective Date
Late 2019/Early 2020
Scoping/ Discovery
2012-2013
Public Open House
September, 2018
*Subject to coordination and funding
Preliminary Maps Released
March 29, 2018
CCO Meeting
July 9, 2018
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A formal objection to the addition/modification of preliminary BFEs/flood depths, SFHA boundaries or zone designations, or regulatory floodway boundaries, subject to the due process requirements outlined in Part 67 of the NFIP regulations
two newspaper notifications
estimates of base flood elevations.
Projected Appeal Period Start: Sometime in November 2018 Appeal Period End Date: Sometime in February 2019
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courag rage e su subm bmit itti ting ng to to your r communi mmunity ty offic icials. ials.
unity ty bu bundl dles es all th the e comment ments s and d forwards rwards th them em to to FEMA MA Reg egion
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rms s are re available ilable here re at t th the ope pen n house se at t th the e engi ngine neering ering ta tabl ble. e.
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Letter Of Map Amendment (LOMA)
for property owners who believe a property was incorrectly included in a floodplain, primarily through showing that the lowest elevation adjacent to the structure is above the 1% flood elevation.
Letter Of Map Revision (LOMR)
for communities to submit better technical information to change a floodplain or to reflect physical changes made to the floodplain.
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Flood Study / Engineering State Table City Table Floodplain Regulations Property Identification & Digital Mapping Flood Insurance
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Flood
Study/ dy/Engi Engineer neering ing
Understand the methodology, data, and technical specifications of the analysis and learn about options to incorporate additional data and SOMAs
Other er Hazar ard Infor
mation
Information about tsunami and seismic hazards, grant programs, disaster preparedness, risk reduction and other hazards
County/Cit ity Tab ables es
Ask about local floodplain regulations, permitting processes, projects, and hazard planning
Flood
lain n Regulat lations
Gather information on the NFIP and building requirements / restrictions, and the NFIP Biological Opinion on the Endangered Species Act
Flood
surance ance
Learn about your insurance policy options and rates applicable to mapped flood zones
Prop
erty ty ID & Digital al Mapp pping ng
Receive a printed map
the flood zone and risks on or near your property
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Coastal Lane County