fairfield coastal resiliency meeting...• presentation of gza credentials (15 minutes) ......
TRANSCRIPT
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GZA GeoEnvironmental, Inc. l 1
GZA GeoEnvironmental, Inc.
Fairfield Coastal Resiliency MeetingGZA Natural Hazard Mitigation, Resilience and ClimateAdaptation ServicesKnown for Excellence. Built on Trust.
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Purpose
• Introductions (5 minutes)• Presentation of GZA credentials (15 minutes)• GZA thoughts relative to the privately-owned sections of Fairfield Beach (30 minutes)• Questions and Answers (Q&A) (60 minutes)
Agenda
Present GZA qualifications and experience relative to assisting Fairfield with coastalresilience and climate adaptation:
Shoreline change and coastal erosion Extreme event and chronic coastal flooding Chronic flooding of roadways Resilience and climate adaptation planning Engineering and design
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Introducing GZA Presenters
Hande McCaw, PE – Coastal Engineer and Senior Project Manager
Samuel Bell, CFM – Senior Hazard Mitigation Specialist, Planner,Funding Specialist
Stephen Lecco, AICP, CEP – Environmental Regulatory and PermitSpecialist
Rodney VanDeusen – Civil Engineer, Marine and Coastal ConstructionManagement
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About GZA
Five Core Service Areas:
Nine Client Sectors:
670 Engineers, Scientists, Planners and Technical Specialistsproviding expert , risk-informed and pragmatic solutions from32 offices throughout the Northeast, Mid-Atlantic and GreatLakes.
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GZA Water Services Staff
• Northeast, Great Lakes, and Mid-Atlantic
• 3 offices in Connecticut (Trumbull, Glastonbury andManchester)
• 80 staff (+/-) including:
o Plannerso Civil, Coastal and Marine engineerso Hydrologistso Ecologistso Geologistso Oceanographers and Meteorologistso Numerical Modelerso Construction Managers
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GZA’s Water Services
• Waterfront and Coastal Engineering• Dams and Levees• Water Resources• Natural Hazard Risk Management, Resilience and Climate Adaptation
Cherokee County Water & Sewerage Authority, GA countywide groundwater investigation
GZA Marine and Waterfront Ship Berthing Project
Water Revenues: FYE19 - $15MRevenue Growth: FYE19 – 25%Water Staff: +/- 80 people
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Waterfront and Coastal Engineering
Site Investigation and Characterization
Metocean Data Analysis
Coastal and Ocean Modeling
Design of Waterfront Structures
Marine Geotechnical Engineering
Marine Structure Foundation Design
Coastal Processes (SedimentTransport, Beach Erosion, BeachNourishment)
Shore Protection (Structures, Hybridand Natural and Nature-BasedFeatures)
Coastal Dredging and SedimentManagement
Environmental Resource Management& Permitting
Construction Management
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Dams and Levees
Hydrology & Hydraulics Analysis, Modeling andDesign
Dam and Levee Design
Dam and Levee Safety Inspections, ProgramPlanning and Certification
Dam and Levee Rehabilitation
Dam Removal & Stream Restoration
Low Head Hydropower Design, Permitting,Construction and O&M
Emergency Action Planning & InundationMapping
Peer Review and Value Engineering Services
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Water Resources
Water Supply Investigations
• Surface Water
• Aquifer
Water Supply Engineering
Aquifer and Watershed Protection
Inland Lake and Pond Diagnostic Evaluations
Stormwater Management Planning, Engineering Designand Permitting
Inland Lake, Pond and River Dredging and SedimentManagement
Environmental Resource Management & Permitting (withGZA Ecology)
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Risk-Informed Decision Making
Vulnerability Assessment:
• Hazard Characterization
• Vulnerability Assessment
• Risk Analysis
Mitigation Planning
• Site Design
• Emergency Response Plans
Mitigation Design (Flooding)
Climate Adaptation and ResiliencePlanning
Numerical Modeling
Hazard Communication andStakeholder Outreach
FEMA-Related Services
Geospatial Data Management
Natural Hazard Risk Management, Resilience and ClimateAdaptation
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Ecology
• Wetland Delineation, Assessment and Design• Biodiversity, Habitat and Rare Species• Environmental Impact Assessment• Natural Resource Assessment and Permitting• Ecological Restoration• Water Quality Assessment and Planning• Aquatic Toxicity Testing
Aquatic Toxicity Laboratory
Endangered Species AssessmentBass Creek Tidal Flow and Ecological Assessment, Marshfield, Ma.
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Ecology
• Ecological Testing. Freshwater & Marine Sediment Toxicity, SoilToxicity
• Wastewater Testing. Acute and Chronic Testing for Municipal &Industrial Clients with NPDES Permits
• TIE Testing. Evaluation to Help Clients Identify the Source of theirToxicity
• Product Testing. Determining the Toxicity of Lubricants, Cleansersand other Manufacturing Products for Industry
• Culturing. Culturing and Holding Facilities for a Dozen Freshwaterand Saltwater Testing Species
Aquatic Toxicity Analysis
New England Bioassay (NEB), aDivision of GZA is one of the leadingecological and whole effluent toxicitytesting laboratories in the Northeast.NEB has been validated by the U.S.Army Corps of Engineers, NewEngland District for Sediment ToxicityTesting.
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Information / Data Development
Data Hosting/Data Management
Interoperability / Integrated Applications
Web Mapping Applications
Analytics
Mobile GIS (Smart Phones, Tablets)
Visualization/Mapping
Security
GZA Information Management and Solutions Group
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GZA Metocean Data Analysis and Coastal Modeling
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Fairfield Coastal Resilience Issues
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Coastal Setting
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Fairfield Concerns: Coastal Flooding
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Fairfield Concerns: Coastal Flooding
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Fairfield Concerns: Coastal Flooding
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Fairfield Concerns: Coastal Flooding
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CIRCA: 0.5m by 2050 for Planning
Fairfield Concerns: Coastal Flooding
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Fairfield Concerns: Fairfield Beach
• Barrier beach backed by low-lying coastal plain• Upland tidal marsh (partially filled)• Some marsh dikes and tide gates• Beach fully-developed
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Fairfield Concerns: Shoreline Change
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1991
2018
Fairfield Concerns: Shoreline Change
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Fairfield Resilience Studies
• Downtown Green Infrastructure• Presentation to Board of Selectman (Flood & Erosion Board)• Resilient Beach Design and Maintenance Program (Grant program)• Penfield Beach Report• Wastewater Treatment Plant (?)
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For additional information, please see the Plan at theTown’s website:
https://www.oldsaybrookct.gov/conservation-commission/pages/coastal-resilience
GZA Connecticut CoastalResilience:• Old Saybrook• Westport• Stratford• Bridgeport• New Haven• New London
GZA Coastal Resilience Experience in Connecticut
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GZA’s Coastal Resiliency Approach
…… Building Coastal Resiliency
Stratford Coastal Resiliency Plan
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Possible Strategies and Measures
Possible Measures:
• Seawall
• Flood Walls (FEMA accredited levee?)
• Beach Nourishment
• Elevate Roads
• Protect Roads
• Increase Height of Existing Dikes
• Floodproof and Elevate Buildings
• Living Shorelines
• Hybrid Solutions (combining some or allof the above)
* USACE - North Atlantic Coast Comprehensive Study
• Retreat• Protect• Accommodate
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Dune and Beach Nourishment
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Location: Lordship BeachStrategy: AccommodateProject: Beach Nourishment; Dune MaintenanceLength: 2,400 lf
Project
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Dune and Beach Nourishment
Advantages:
• Reduce Flooding by Dampening WaveEnergy
• Easier to Permit than Hard Structures
• Lower Initial Construction Cost
• Recreational and Tourism Benefits
• Ecological Benefits
Disadvantages:
• Sacrificial Structures – Periodic Re-nourishment
• Maintenance Cost
• Availability of Sand
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Marshfield, MA Beach Nourishment
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North Shore, MA Beach Nourishment
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Winnapaug Pond Dredging and Beach Nourishment
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Dewatering & Stockpiling
Final Grading & Field Revisions
Winnapaug Pond Dredging and Beach Nourishment
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Pine Creek Dredging Feasibility Study
• GZA Study for Town in 2013• 32,000 cy of sediment to be dredged• Potential dune creation or beach
nourishment material
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Offshore Breakwaters
Advantages:
• Reduce Flooding by Dampening WaveEnergy
• May Result in Accretion Behind theStructure
• Performance under Storm Conditions
Disadvantages:
• Challenging Permitting Process
• High Initial Construction Cost
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Flood Walls/Levees
Advantages:
• Reduce Flooding
• Designed to withstand lowfrequency storm events
• Can be built Along theCoast or Set-Back inland
Disadvantages:
• High Initial Construction Cost
• Challenging PermittingProcess
• Overtopping and Scour
• Long-Term Beach Recessionand Volume loss
• FEMA-accreditation andcode compliance issues
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Inland Berms or Dikes
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Location: Ashcroft, Inc.Strategy: Protect & AccommodateProject: Increase Berm Crest; New Berm; AdditionalStormwater DrainageLength: +/-1,400 lf (Ashcroft, Inc.)
+/-1,000 lf (Town)
Project
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Perimeter Protection
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Perimeter Protection
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Living Shorelines
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Integrated Measures
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Hybrid Solutions
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Hybrid Solutions
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Stakeholder Outreach
Municipality
State
Federal Agencies
NGOs
Universities
Permitting Agencies
Public
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Regulatory/Permitting Agencies
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Regulatory Jurisdiction
CJLCJL
DEEP
Town
Town
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Governing Laws & Regulations
Sections 401 & 404 Clean Water Act
Section 10 Rivers & Harbors Act
Magnuson Stevens Act
Federal and State Endangered Species Acts
Section 106 National Historic Preservation Act
Structures, Dredging and Fill Regulations
Tidal Wetlands Regulations
Coastal Zone Management Act
National Environmental Policy Act
Connecticut Environmental Policy Act
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Habitat and Wetland Considerations
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Flood and Erosion Control Structure
CT Definition
any structure the purpose or effect of which is to control flooding or erosion fromtidal, coastal or navigable waters and includes breakwaters, bulkheads, groins,jetties, revetments, riprap, seawalls and the placement of concrete, rocks orother significant barriers to the flow of flood waters or the movement ofsediments along the shoreline
Exclusions
Any activity, including but not limited to, living shorelines projects, for which theprimary purpose or effect is the restoration or enhancement of tidal wetlands, beaches,dunes or intertidal flats”
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Section 404 Permitting
General Permits Categories
• Self Verification (SV)
• Pre-Construction Notification (PCN)
• Individual Permit (IP)
GP-10: Aquatic habitat restoration, establishment and enhancementactivities (SV or PCN qualified)
“rehabilitation or enhancement of tidal streams, tidal wetlandsand tidal open waters; provided those activities result in netincreases in aquatic resource functions and services”
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Questions?