HomeMy Public PortalAboutShannon_floodplain_Brewster Coastal Committee 9.13.18Protecting Infrastructure and Cultural
Resources from Sea Level Rise
Shannon Jarbeau, Floodplain Coordinator
Cape Cod Cooperative Extension & Woods Hole Sea GrantSeptember 13, 2018
BrewsterCoastalCommittee
State SLR Guidance
2
0
1
8
Slide source: Greg Berman
Carol1938
10 year flood will be every year
(10% into 100%)
Changing the return period of flooding
Slide source: Greg Berman
Brewster Floodplains: Coastal
•765 acres 55% open space
•136 parcels $70.1 million value (Cape Cod Commission)
•64 structures
•Average flood insurance cost: $2,600/year
•Plus a 5% discount
•≈ 10 historic structures
Adaptation Considerations
•Why do people visit/live in Brewster? What amenities/conditions do they expect? What is most important to preserve?
•What is and isn’t at risk from sea level rise?
•Infrastructure
•Roads
•Bridges
•Utility lines (power, gas, water)
•Stormwater
•Groundwater –septic, salt water infiltration
•Cultural resources
•Beach access
•Property access and values
Adaptation Approaches
•Hazard Mitigation Plan!
•More data
•SLR mapping PLUS storm surge
–what’s at risk? Is it a problem?
•Stormtide Pathway mapping
•Review potential future
floodplains
•Structural mitigation
•Infrastructure investments
•Flood insurance coverage
•Let the beach migrate or dune
planting/beach replenishment
Examples from Elsewhere
•Other Cape towns
•Limiting future at-risk development
•Beach nourishment/dune planting
•Public outreach
•Road/bridge elevations
•Drainage, tidal back-ups
•Critical facilities protection
•Transfer of Development Rights
•Naval Station Norfolk (VA)
Thank You!
Shannon.Jarbeau@barnstablecounty.org (508) 375-6952