ICCE 2022

How to Cite

Kana, T. W., & Traynum, S. (2023). PERFORMANCE OF A TERMINAL GROIN – FOLLY BEACH, SC USA. Coastal Engineering Proceedings, (37), structures.50.


A terminal groin was designed by the authors and constructed at Folly Beach County Park (South Carolina) in June 2013 to restore and stabilize a highly eroded spit. Groins are rarely permitted in the Carolinas and require extensive monitoring to assess impacts. In the case of the Folly Beach project, permits prescribe groin removal or periodic downcoast nourishment if erosion rates exceed pre-project rates. The common expectation is that groins will accelerate downcoast erosion because of sand trapping by the structure. Annual surveys have been performed by an independent surveyor, GEL Engineering (Charleston), and provide source data for the present analysis.


ASCE (1994): Coastal groins and nearshore breakwaters. American Society of Civil Engineers, New York, NY, 87 pp.

Barrineau, Janmaat, and Kana, (2021): Empirical depths of closure along the US East Coast. Coastal Engineering, Vol. 170.

CSE (2012): Phase 1 planning for Folly Beach County Park stabilization project, Folly Beach, South Carolina. Planning Report for Charleston County Park and Recreation Commission, Charleston, SC, 47 pp + appendices.

Kana (2012): A brief history of beach nourishment in South Carolina. Shore & Beach, Vol 80(4), pp 1-13.

Van Dolah, Digre, Gayes, Donovan-Ealy, and Dowd (1998): An evaluation of physical recovery rates in sand borrow sites used for beach nourishment projects in South Carolina. Final Report to SC Task Force on Offshore Resources and Minerals Management Service Office of International Activities and Marine Minerals; SCDNR, Charleston, SC, 77 pp + appendices.

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Copyright (c) 2023 Timothy W. Kana, Steven Traynum