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Foundation Matters

HCF’s Official Comments on Army Corps’ 3 x 3 Study

Posted: June 18, 2020

The Foundation has submitted the following comments to the Army Corps regarding the 3 x 3 Study:

As an organization dedicated to preserving Charleston’s historic resources, HCF feels strongly that we should consider every possible option for the long-term protection of Charleston from storm surge flooding and sea level rise. HCF is generally supportive of perimeter protection, if our concerns about design, aesthetics and impacts to historic resources can be alleviated. We have categorized our comments, concerns, and questions by subject area below.


Address Areas of the Peninsula Differently:

Quality of Life and Livability:

Adhere to the Specific Recommendations Made for the Peninsula, East Side and Medical District in the Dutch Dialogues Charleston Report:

Design, Engineering and Aesthetics:

Historic and Cultural Resource Concerns:

Economic Concerns:

Temporary Construction Concerns:

HCF is proud to be invited to participate as a consulting party for purposes of the National Historic Preservation Act Section 106 Process and appreciative of the opportunity to provide comments and questions on the 3×3 Study. We look forward to continued work with the Corps and the City of Charleston in the optimization phase and beyond to ensure that the final flood risk management plan adheres to the recommendations of Dutch Dialogues Charleston, contributes to Charleston’s quality of place, and is sensitive to the historic and cultural integrity of our neighborhoods, while accomplishing the goals of storm surge protection to reduce damages and loss caused by coastal storm flooding.

2 responses to “HCF’s Official Comments on Army Corps’ 3 x 3 Study”

  1. G. Robert (Bob) George, PLS, PE says:

    Before considering a perimeter flood barrier of any height from 8 to 12 feet above MSL 88 NGVD, prepare topographical exhibits based upon existing LIDAR data that indicate the area of the Peninsula that will be flooded within the barrier perimeter. If produced on a foot by foot increase from 8 to 12 feet elevation, such exhibits will provide an early understood visual image of the areas within the perimeter flood wall that will be protected for each specific elevation, and more importantly, the areas flooded by surge events higher than each prevressive barrier elevation. The unintended consequence of any barrier elevation will be to quickly pump out the interior impounded volume of detained flood water after an overtopping event.
    There has also been very little discussion about the life-cycle cost of operating and maintaining a flood barrier system and the massive pumping facilities required. Emergency pump power requirements are another worthy topic.

    • Blair Phillips says:

      Thank you for your interest and insight into the project. I hope you were able to submit your comments in an official capacity to the Army Corps during their public comment period.
      -Cashion Drolet, Chief Advocacy Officer

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