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At Dominion Energy, we are dedicated to finding the best solution for the long-term energy needs within the communities we serve. As we remain focused on reliability, we have initiated a project to rebuild a portion of an aging electric transmission line, which has been in operation for more than 45 years. Many of the structures along the line are in difficult-to-access areas, which make restoration times significantly longer in the event of a power outage. These lines are known as the Cainhoy – Mt Pleasant 115 kV #1 and #2 line, and the portions planned to be rebuilt are both three miles in length. The entirety of the rebuild will be done exclusively on existing transmission right of way. Letters will be sent out to impacted property owners along the route as DESC gets closer to construction.

The engineering design and environmental permitting began in the summer of 2020 and is concluding in the second quarter of 2021. Construction will begin in the summer of 2021 and is expected to be complete by the end of 2021.
Dominion Energy South Carolina will be replacing the existing 115 kilovolt (kV) wooden “H-frame” poles along this three-mile corridor with self-supporting galvanized steel structures. The new line will be designed to meet all modern electric codes as well as provide additional reliability and resiliency to the greater Charleston area. The rebuilt lines will be constructed by contractors of Dominion Energy. At this time, DESC expects there to be no interruptions in power to its customers.
The project is set to take place in Mt Pleasant. The starting point of the rebuild is north of Horlbeck Creek in the Rivertowne County Club. From there, the lines head South and cross Horlbeck Creek, the Palmetto Islands County Park, and the Longpoint neighborhood. The rebuild project concludes just before the line crosses over Long Point Rd.
While most of the line is away from heavily traversed areas, neighborhood residents may see lane closures from time to time inside the neighborhood as Dominion Energy and its contractors work to ensure the line is rebuilt safely and effectively.
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