Lane County Coastal FEMA Map Update

Lane County Coastal FEMA Map Update

Lane County Planning Commission Public Hearing

February 4, 2020 6:00 p.m. Florence Events Center

Presentation by: Deanna Wright, Associate Planner, CFM Land Management Division, Lane County Public Works

PROJECT TEAM

State Oregon Department of Geology & Mineral Industries (DOGAMI) - Lidar acquisition, coastal flood analysis, and map production.

Federal FEMA Region 10 Risk Analysis Branch - Initiates project via Risk Map Program - NFIP

Oregon Department of Land Conservation & Development (DLCD) Technical Partner with LMD staff

Strategic Alliance for Risk Reduction FEMA Region 10 private contractor - River flood analysis and mapping

Why do flood map revisions?

? Last flood hazard update in LC was in 1999 ? Flood risk changes ? Goal to reduce risk to lives and property in LC ? Flooding is most costly hazard in Oregon, but is highly predicable ? New technology advances

Where are map Revisions taking Place?

SCOPE OF WORK

? Hydrology: Developed flood

Frequencies for Zone A streams

? Hydraulics: Lidar-based approximate analysis

For Zone A streams

? Coastal: New analysis on the open

Coast for Zone VE and V

? Lakes: Determined the static

Approximate based BFE

? Re-delineation: For Zone AE, remap

Floodplains using effective BFEs and Lidar Terrain data

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