R9W Miami_Dade_BB_CSRM_Miami_Beach_Commission_Mtg_62420MIAMI-DADE BACK BAY COASTAL
STORM RISK MANAGEMENT DRAFT
INTEGRATED FEASIBILITY REPORT
AND PROGRAMMATIC
ENVIRONMENTAL IMPACT
STATEMENT
CITY OF MIAMI BEACH COMMISSION MEETING
Norfolk District
U.S. Army Corps of Engineers
24 June 2020
https://www.saj.usace.army.mil/MiamiDadeBackBayCSRMFeasibilityStudy/
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Opening Remarks
Overview: Background and Timeline
Tentatively Selected Plan
How to Provide Comments
Question and Answer
OUTLINE
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Bipartisan Budget Act of 2018, Public Law 115 -123
authorizes the government to conduct the Study at full
Federal expense,
3 years and $3 Million to complete study,
The Miami-Dade Back Bay CSRM will investigate solutions
that will reduce damages and risks from impacts of coastal
storms while considering sea level rise. The study will not
address federally owned land (e.g. Everglades National
Park), but will focus primarily on the urban and coastal areas
of the county,
A draft Integrated Feasibility Report and Programmatic
Environmental Impact Statement (EIS) has been prepared.
The study will conclude in the Fall of 2021 with Final
versions of the documents.
STUDY BACKGROUND
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SMART Feasibility Study Process:
Miami-Dade Back Bay Coastal Storm Risk Management Study
Tentatively Selected Plan (TSP)
Milestone: Jan 2020
Alternative Evaluation and
Comparison:
•Environmental Considerations
•Parametric Costs and
Determine Preliminary Benefits
(Future With Project Conditions)
•Final Array of Alternatives
•Detailed Benefit-to-Cost Ratio
•Stakeholder Input
•Determine the TSP
•Develop Draft Report
Agency Decision Milestone
(ADM): Oct 2020
•Release Draft Report
(Integrated
Environmental Impact
Statement) and Respond
to Comments
•Initiate Multiple Levels
of Quality Review
•Finalize Environmental
Mitigation Plans
•Develop Final Report
Sept 2021
•Release Final
Report
•Complete
National
Environmental
Policy Act
(NEPA)
Conclusions
Alternatives Milestone:
9 Jan 2019
•Receive Stakeholder
Input on Potential
Measures
•Develop Screening
Criteria
•Formulate Initial Array
of Alternatives
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1 3 5
SCOPING &
PLANNING STRATEGY
ALTERNATIVE FORMULATION & ANALYSIS
FEASIBILITY-
LEVEL
ANALYSIS TO
ADM
CHIEF’S REPORT
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District Engineer transmits
final report package
April 2021
Concurrent review
Execute Feasibility
Agreement with non-
Federal Sponsor:
9 Oct 2018
•Initiate Scoping
•Invite Agencies to
Participate
•Examine Existing
and Future Without
Project Conditions
•Identify Problems,
Opportunities,
Objectives and
Constraints
FEASIBLITY-LEVEL ANALYSIS TO TSP
Draft Report
Release:
5 June 2020
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SELECTION OF FOCUS AREAS
Focus areas were selected based on
(1) the Social Vulnerability Index and
(2) expected flooding damage
Social Vulnerability Index (SVI) from the Centers for
Disease Control and Prevention (CDC) uses U.S. census
data to determine social vulnerability by census tract. Each
tract was ranked on 15 factors grouped into four themes
which include:
Socioeconomic status
Household composition / disability
Race / ethnicity / language / minority status
Housing/transportation
Flooding damage was estimated using the HAZUS model
using FEMA’s 1% (100-year) annual chance flood with 4’ of
SLR.
4000’ x 4000’ grids made to narrow down damage areas
Flooding damage was multiplied by SVI to obtain a
composite risk map which showed seven socially
vulnerable economic damage centers
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TENTATIVELY
SELECTED PLAN
(ALTERNATIVE 8)
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Surge barriers at Biscayne Canal, Little
River, and Miami River all of which
include associated pump stations and
floodwalls
Nonstructural mitigation at seven socially
vulnerable economic damage centers
Outside structural measures at Arch
Creek, Little River, and Miami
River/Edgewater.
Aventura, Cutler Bay, North Beach,
and South Beach
Natural and Nature-Based Features are
being considered at the Cutler Bay site
Critical infrastructure mitigation on
priority asset categories throughout all of
Miami-Dade County (not shown on map)
Total Project First Cost :
$4,586,000,000
Benefit-to-Cost Ratio
(BCR): 9.4
Annual Net benefits:
$1,640,000,000
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•Deadline: 20 July 2020
•Email: MDBB-CSRMStudy@usace.army.mil
•Public Web-Page Web Mapper Tool:http://arcg.is/fm0Xe
•Written Comments:
Environmental Analysis Section, Norfolk District
803 Front Street
Norfolk, Virginia 23510
•For any accessibility issues that prevent written comments, please call
(757) 201-7728.
•Project Documents are Located:
https://www.saj.usace.army.mil/MiamiDadeBackBayCSRMFeasibilityStudy/
PUBLIC COMMENT OPTIONS
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QUESTIONS