Low Battery Seawall Repair 

Alert: Traffic Detour

Work on Phase 3 of the Low Battery Seawall Repair commenced on April 12thth. The anticipated duration of construction is eighteen months. The map below outlines detours that should be expected throughout Phase 3.

Battery Phase 3 Traffic Guide


  1. Frank Newham

    Senior Engineering Project Manager

  2. Robin Kidd

    Outreach Coordinator

  3. Stormwater Management

    Physical Address
    2 George St
    Suite 2100
    Charleston, SC 29401

    Mailing Address

    Charleston, SC 29402



Project Updates

Below is a list of recent highlights from the current phase of the project.

  • This week:
    • Continuing the site Demo
    • Continuing Coring
    • Continue Grout and Casings on Section 2 
    • Begin Micro-Piles on Section 1 

Key Terms

  • Coring- Using a cylindrical saw (similar to a hole saw , but many times larger) to cut vertical holes in the existing concrete wall in order to insert steel casing pipes and later micro-piles.
  • Micro-piles- Consisting of three components:
    • A steel casing pipe about 20' long goes into the cores
    • Steel rods are then inserted in the casing and drilled to design depth.
    • During the drilling process, high-strength grout is injected through the hollow rod to fill the annular space in the casing and encapsulates the rod below the casing.
  1. Project Overview
  2. Phase 1
  3. Phase 2
  4. Phase 3

About the Project

The Low Battery was constructed as part of a large land reclamation project undertaken in two phases: The first section (1909 to 1911) extended from Tradd Street to King Street. The second phase (1917 to 1919) extended from King Street to the "Turn" at the intersection with East Battery Street. The concrete wall of the Low Battery was constructed on a timber deck supported by timber pilings. The seaward face of the Low Battery is skirted with concrete panels attached to timber sheeting and batter piles. The repair of the "Turn" is the first phase of tDJI_1037he overall seawall repair project and has been completed.

A "Seawall Evaluation and Study" prepared by Cummings and McCrady evaluated the condition of the Low Battery wall in 2004 and presented potential repair methods and an estimate of probable cost. In May 2015, the consulting firm Johnson, Mirmiran and Thompson (JMT) began the surveying work necessary to accurately collect data needed for the assessment and design of the seawall. A new City initiative was introduced during the design phase that requires new City projects with a design life of 50 plus years to account for an anticipated sea level rise of 2.5 feet. This requirement, along with the need to reconstruct the sidewalk to meet the Americans with Disabilities Act (ADA) guidelines for accessibility, has led to changes in the design approach. 

StoryMap

To learn more about the project, please check out the Low Battery Seawall Repair StoryMap. Check back for updates as the project progresses.

Low Battery Quick Facts

Gallery

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Unveiling of Phase 3 of the Project

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Videos

Screenshot (28) Opens in new windowLow Battery Phase 3 Live


Screenshot (26) Opens in new window

Low Battery Seawall Repair Phase 2 Opens in new window