Entergy selected for US$13.7M to deploy dynamic line ratings
The four-year plan covers existing lines in three states, but Entergy has given no installation start date or full project budget.
Ines Halvorsen
On Sept. 24, the U.S. Department of Energy announced its SPARK selections; Entergy NYSEETR reported on Sept. 30 that its 1,125-mile dynamic line rating plan was among them, with US$13.7 million in potential federal support. Entergy targets at least a 25 per cent increase in transfer capability on selected corridors using existing lines in the Southeast. The federal share would support a four-year rollout by Entergy utilities in Mississippi, Arkansas and Louisiana.
Shares of Entergy NYSEETR closed higher at US$100.91 at 4:00:06 p.m. EDT on Friday in New York.
The Sept. 30 company release describes dynamic line rating, geographic surveys, substation and terminal upgrades, and hardware integration across existing transmission lines. Entergy Mississippi LLC is the prime applicant on DOE's selected-applications list; the corporate release says Entergy utilities in all three states would carry out the work.
DOE expects formal awards between October 2026 and January 2027. Entergy's release gives no installation start, staged completion dates or total project budget. The selection identifies potential federal support, but does not establish that the company has received grant cash.
The plan would put real-time line ratings on existing corridors to determine how much power they can safely carry as operating conditions change. Entergy also says sensors could be moved to other corridors during the four-year effort as constraints shift. The release names no equipment supplier or delivery schedule.
"Installing this new technology is intended to help us deliver more reliable, affordable electricity to customers by reducing congestion, improving system readiness for large loads, and potentially avoiding capital costs for other transmission upgrades," Entergy chief external affairs officer John Hudson said in the release.
DOE Expects Formal Awards by January 2027
Entergy's early modeling suggests a 29 to 61 per cent increase in available power capacity across the project area, according to its Sept. 30 release. That range is a modelled possibility, while the at-least-25-per-cent target applies to selected corridors. Neither figure is a measured result from installed equipment.
DOE's Sept. 24 announcement said it intended to support 31 grid projects across 26 states. It described US$1.9 billion in federal funding and US$3.35 billion in recipient cost sharing across the selections, without setting out Entergy's own contribution in its program summary. The department's selected-applications list says project details may change before formal assistance agreements are finalized.
Entergy says the work would address load growth from industry, manufacturing and data centres while reducing congestion on lines already in service. It has not quantified customer bill savings or named a new customer whose connection depends on these upgrades. Those distinctions leave the size of the benefit to ratepayers to be tested as deployment proceeds.
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DOE's next dated step is its expected award window from October 2026 through January 2027. Entergy has not given a date for installing the first equipment or completing the 1,125-mile rollout.
