Sumter Utilities served as the prime contractor for this 4.62-mile transmission line rebuild, converting wood H-frame structures to single pole steel for Dominion Energy South Carolina. The project required extensive environmental protection measures across delineated wetlands.

When estimating this project, Sumter had a choice: pay a subcontractor to properly manage the matting, or leverage partnerships within Quanta to self-perform the matting element of the job and reduce expenses. Ultimately, Sumter stepped up to new challenges, and managed the installation of 5,300 specialized timber mats with help from B&N Clearing, a sister company. Crews handled all matting operations including hauling, installation, repositioning, and removal with support from substation teams and Lee Electrical.

Ultimately, Sumter finished the project well below budget, and with a new skillset to add to our resume. This infrastructure modernization will improve power reliability for Dominion Energy while demonstrating Sumter’s commitment to environmental responsibility in sensitive ecological areas.

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Sumter Utilities was contracted by Dominion Energy Southeast (SC) to rebuild 20+ miles of 115kV single circuit transmission line. Additionally, Sumter was to convert a 115kV line from single wood poles to a single steel pole, double-circuit bundle configuration. Located in the areas of Yemassee, Beaufort, and Lady’s Island, South Carolina, the project was nestled within low-lying wetland and tidal areas, presenting substantial terrain challenges. Additionally, Sumter Utilities was tasked with installing vibratory caisson foundations on all the structures, some driven to depths of fifty feet in the ground. By utilizing matting in tidal areas, collaborating effectively with a variety of subcontractors, and pivoting the plan after a vibratory caisson refusal, Sumter rose to the challenge, driving the project forward to success.

The Sumter Utilities team demonstrated exceptional performance for this $22M project. As the primary contractor, Sumter met the schedule with zero power interruptions and zero injuries. Transmission and distribution joint efforts made this project successful for everyone involved, and Dominion Energy was very pleased with Sumter’s ability to deliver.