South Atlantic Coastal Study - SACS

Final Reports

The SACS Final Report and appendices are available for download. Thank you to all those who supported their development. The earlier draft versions of the documents are still available under the Draft Report section of the website.

SACS Main Report Outreach Appendix Florida Appendix Puerto Rico Appendix
Engineering Appendix Alabama Appendix Mississippi Appendix South Carolina Appendix
Geospatial Appendix Georgia Appendix North Carolina Appendix U.S. Virgin Islands Appendix
Final Recommendations Summary Spreadsheet


Final Report Placemats

These placemats summarize the final recommendations by each state and territory as well as a summary placemat for the entire study area.

Overview Placemat Alabama Placemat Florida Placemat
Georgia Placemat Mississippi Placemat North Carolina Placemat
Puerto Rico Placemat South Carolina Placemat U.S. Virgin Islands Placemat

Technical Study Products

There are a total of 12 study products as part of SACS. Information on each technical product is provided below.

SACS Key Products Placemat

Coastal Hazards System

Coastal Hazard System
Provides wave and water levels derived from numerical modeling.

Go to the Coastal Hazards System



Study data and additional information of various SACS products, including the Tier 1 and Tier 2 Risk Assessment, Environmental Analysis, and more...

Go to the Geoportal

SACS Tier 1 Risk Assessment

SACS Tier 1 Risk Assessment A regional-level analysis of potential flooding risk in coastal areas

Go to the Tier 1 Risk Assessment

Regional Sediment Management (RSM) Optimization Update

RSM Update 
Identifies and quantifies total contribution of RSM principles to projects in the SACS study area that support long-term coastal resiliency.

View 2020 RSM Optimization Update

Sand Availability and Needs Determination (SAND)

SAND Report
Quantifies the need and availability of sand to maintain sediment for current beach nourishment projects within the SACS study area through the next 40 years

View SAND Report

Go to the SAND Geoportal


SACS Tier 2 Economic Risk Assessment

Tier 2 Economic Risk AssessmentEstimated storm surge inundation risk expressed as dollar damages to public and private property and limited critical infrastructure.

Go to the Tier 2 Economic Risk Assessment

View Final Tier 2 Economic Risk Assessment Report

Coastal Program Guide

Outreach and information package to help communities better leverage needed resources on a disaster-wide, statewide, or community-wide basis.

View Final Coastal Program Guide

Institutional & Other Barriers Report

Document identifies institutional and other barriers to providing comprehensive protection for affected coastal areas.

View Final Institutional & Other Barriers Report

SACS Environmental Technical Report

Priority Environmental Area Identification

The ‘SACS Environmental Technical Report: Environmental Resources Vulnerability and Risk Analysis and Priority Area Identification’ identifies areas of environmental risk, priority environmental areas, and includes an appendix dedicated to cultural resources

View SACS Environmental Technical Report

View SACS Cultural Resource Appendix

Go to the SACS Environmental Analysis

Planning Aid Report

Planning Aid Report
Report of priority biological resource habitats in the South Atlantic region that are vulnerable to harm from coastal storms and sea level rise with a focus on areas used by federally-listed species. Report will also include a description of risk to coastal National Wildlife Refuges

View Planning Aid Report


Focus Area Action Strategies (FAAS)


FAAS will use SACS products in combination with other resources to develop actionable risk reduction strategies with stakeholders. FAAS will serve as examples of how vulnerabilities in other high risk locations can be addressed.

Measures & Cost Library


Detailed list of CSRM measures and their costs developed to a screening level for use in USACE and stakeholder planning

View Final Measures & Cost Library

Study Overview

The study will be modeled closely after the North Atlantic Coast Comprehensive Study (NACCS), a Congressional response and precedent-setting vulnerability and flood risk-reduction study completed for the north Atlantic coastline in the wake of Hurricane Sandy. The study will conduct regional analyses of coastal risk and identify initial measures/costs that can address vulnerabilities with emphasis on regional sediment management (RSM) as an actionable strategy to sustainably maintain or enhance current levels of coastal storm risk reduction.

SACS Review Plan

Study Goals


Statement of Study Area