South Atlantic Coastal Study - SACS

Technical Study Products

There will be a total of 12 study products in this study. Information on each technical product will be provided here when available.

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


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 Draft 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 Draft Coastal Program Guide

Institutional & Other Barriers Report

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

View Draft 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 Draft SACS Environmental Technical Report

View Draft 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 & Costs Library


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

View Draft Measures & Costs 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


Latest Updates

SACS Draft Report
The SACS Draft Report and appendices will be available for comment beginning October 15 for a 30-day comment period.
USACE will be hosting Draft Report Roll-out Webinars for the SACS. These webinars will provide a brief overview of SACS, including an overview of the Final Draft SACS Main Report and its associated products. Each webinar will be focused on a particular state or territory, providing regional findings, strategies, recommendations, and information on the comment collection process.
Alabama 10/18/2021 11 AM - 1 PM ET
Mississippi 10/19/2021 11 AM - 1 PM ET
North Carolina 10/20/2021 2 PM - 4 PM ET
Florida 10/22/2021 1 PM - 3 PM ET
South Carolina 10/26/2021 1 PM - 3 PM ET
Puerto Rico 10/26/2021 10 AM - 12 PM ET
Georgia 10/27/2021 2 PM - 4 PM ET
Florida 10/28/2021 1 PM - 3 PM ET
USVI 11/4/2021 10 AM - 12 PM ET
Quarterly Progress Briefing

The most recent SACS quarterly progress briefing was held on July 21, 2021 and covered the Coastal Hazards System. Slides from the presentation can be found here and a recording is available in the video playlist below.

Contact Us

Study Schedule

  • August 2018 – Study Initiation
  • August 2019 – Shared Vision Milestone
  • August 2021- Recommendations Milestone
  • October 2021 – Draft Watershed Plan/Report
  • August 2022 – Final Watershed Plan


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