As a leading engineering firm serving both North and South Carolina, Gunderson Engineering recognizes the critical importance of coastal adaptation in the face of rising sea levels and increasing storm intensity. South Carolina, with its extensive coastline and valuable coastal ecosystems, faces unique challenges in balancing development, environmental protection, and resilience. This article explores recent developments in coastal adaptation strategies and building codes in South Carolina, highlighting key considerations for infrastructure and development projects.
New Building Codes Extend Stricter Standards Inland
As of January 1, 2023, South Carolina has implemented new building codes that significantly impact coastal construction practices. These updated codes extend the stringent construction standards previously required only along the beachfront to areas further inland. Key changes include:
- Application of V-zone construction standards to Coastal A zones
- Elevation requirements now measured from the lowest horizontal structural member
- Limited enclosed areas under houses to 299 square feet with breakaway walls
- Commercial structures in Coastal A zones must be elevated rather than using flood-proofing techniques
These changes aim to enhance resilience but may increase construction costs and render some existing structures non-conforming. Engineers and developers must carefully consider these new requirements when planning coastal projects.
Living Shorelines: A Nature-Based Solution
South Carolina is increasingly embracing living shorelines as an alternative to traditional hardened erosion control structures. In 2021, the state implemented new regulations to streamline the authorization process for living shoreline projects. These nature-based solutions offer several benefits:
- Maintain and restore natural estuarine processes
- Enhance wetland resiliency and water quality
- Provide diverse intertidal habitats
- Reduce environmental impacts associated with hardened structures
Gunderson Engineering can assist clients in evaluating site suitability for living shorelines and navigating the permitting process for these innovative coastal protection measures.
Beachfront Management and Jurisdictional Lines
The South Carolina Department of Health and Environmental Control (DHEC) is preparing for its next review of beachfront jurisdictional lines, scheduled to begin in 2024. These lines, consisting of a baseline and setback line, delineate the extent of state permitting authority for activities within the beach/dune system critical area. Key points include:
- Lines are reviewed every 7-10 years
- The review process will be phased between 2024 and 2027
- Public education and engagement opportunities will be available
Engineers and developers should stay informed about these upcoming changes, as they may impact future coastal projects and property development.
Challenges and Opportunities
Coastal adaptation in South Carolina presents both challenges and opportunities for the engineering and development community:
- Balancing growth with environmental protection
- Implementing innovative resilience strategies
- Navigating complex regulatory landscapes
- Addressing equity concerns in coastal communities
- Incorporating climate change projections into long-term planning
Gunderson Engineering is well-positioned to help clients navigate these challenges and develop sustainable, resilient coastal infrastructure solutions.
Conclusion
As coastal adaptation becomes increasingly critical in South Carolina, Gunderson Engineering remains committed to providing cutting-edge expertise in infrastructure and development projects. By staying abreast of the latest building codes, environmental regulations, and nature-based solutions, we can help our clients create resilient, sustainable coastal communities throughout the Carolinas.
Sources:
https://coastalobserver.com/new-building-codes-take-stricter-standards-beyond-the-beachfront/
https://scdhec.gov/environment/your-water-coast/ocean-coastal-resource-management-ocrm/living-shorelines-regulations-update
https://scdhec.gov/environment/your-water-coast/ocean-coastal-resource-management-ocrm/beachfront-management/state-beachfront
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