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Work Aiming to Start This Winter on Underground Power Line in Tysons

(Updated at 3:10 p.m.) Work may start on a new underground power line running through Tysons before the end of the year.

The existing load on power lines from the Tysons and McLean areas is expected to exceed 300 megawatts by 2022, according to Dominion Energy. The new power line will keep Dominion under the limits.

To make sure there’s enough power, Dominion is building an additional power source to avoid violating mandatory standards.

At a meeting last night (Tuesday) at Kilmer Middle School, Dominion officials said that construction is set to kick off in November or December — depending on the weather and when permits get approved — for the Idylwood-Tysons 230 kilovolt (kV) Project.

The project will add a new 4-mile-long transmission line underground, running under the W&OD Trail by I-66 and I-495 before heading up Gallows Road to International Drive in Tysons .

Commuters and pedestrians can expect lane closures along Gallows Road and International Drive in Tysons when construction starts.

Specific dates for the construction schedule and closures have not been determined yet, an engineer for the project told Tysons Reporter. People can expect an interactive online map, which will show what’s been completed and what’s under construction.

“People who live and work in the area will most likely be impacted by the construction,” Peggy Fox, a Dominion spokesperson, said. “We do not expect to interrupt service to our electric customers.”

Currently, the bidding process is underway for the project’s contractor. The final cost will be determined once the contractor is selected — the estimated cost right now is roughly $120 million.

The State Corporation Commission approved the project last fall.

The project is expected to be completed by late 2022, with rehabilitation work going into 2023.

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