Assertion Supported AI assessment confidence: 95% certainty 4/5 debate potential 1/5

NextEra plans 100-mile Mid-Atlantic transmission line across PJM

Maeve Allsup · How data centers are complicating transmission expansion · Jun 25, 2026 · at 4:17

Latitude Media reporter Maeve Allsup outlines the scope, route, and projected capital cost of the Mid-Atlantic Reliability Line (MARL) transmission project in PJM territory.

0:00 / 0:22exact quote · 22.6s

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“It's a planned high voltage transmission line spanning about a 107, I think a little over a hundred miles in PJM. It would run from Southwestern Pennsylvania to Northern Virginia, crossing through Maryland and also a good chunk of West Virginia. It's being developed by next era and is expected to cost around nine hundred and sixty million dollars.”

quote is from the automated transcript, cleaned for reading: filler sounds and stutters are removed, nothing is rephrased. names can be misheard (the analysis reads context, assessments check outside sources). how →

The claim, plainly

NextEra Energy is developing the Mid-Atlantic Reliability Line, a high-voltage transmission line spanning over 100 miles across PJM from southwestern Pennsylvania to Northern Virginia, expected to cost approximately $960 million.

a quote alone can be ambiguous, so this restates it with the references and context of the conversation around it resolved. AI-written; the tape below the player is the source.

Assessment

Every substantive leg of the claim is confirmed by official filings and project records. NextEra Energy (via its subsidiary NextEra Energy Transmission MidAtlantic, LLC) is developing the 500-kV high-voltage transmission project known as MARL (officially the MidAtlantic Resiliency Link, though occasionally referenced as the Mid-Atlantic Reliability Line). The planned route spans approximately 107.5 miles across the PJM region from southwestern Pennsylvania (Greene County) to Northern Virginia (Frederick County), passing through West Virginia and Maryland. Furthermore, regulatory filings updated in early 2026 placed the projected capital cost of NextEra's portion of the project at approximately $960 million.

PJM Interconnection selected NextEra Energy Transmission MidAtlantic in December 2023 for the MARL project to resolve 2022 RTEP Window 3 reliability issues.
The project is a 500-kV transmission line spanning approximately 107.5 miles from Greene County, Pennsylvania to Frederick County, Virginia, crossing Maryland and West Virginia.
NextEra Energy regulatory filings submitted in early 2026 confirmed an updated estimated cost of approximately $960 million for its portion of the MARL project.

Checked against

[1] nexteraenergy.com [2] nexteraenergytransmission.com [3] latitudemedia.com [4] alleghenyfront.org [5] tsagroupconsulting.com [6] ieefa.org [7] wajr.com [8] wvpublic.org

Mid Atlantic Reliability Line PJM Mid Atlantic Reliability Line NextEra NextEra Energy Mid Atlantic Reliability Line 960 million

assessed as of 2026-09-02

This assessment is an AI reading of a public statement, made against the cited references with the confidence shown. It can be wrong. The quote, the tape and the references are all on this page; if something is off, use report an error below. full disclaimer →

Mentioned

Mid-Atlantic Reliability Line NextEra Energy PJM

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More from Maeve Allsup

Opinion

Allsup: Early opposition makes 2029 Mid-Atlantic transmission target unlikely

“The level of opposition, the force of that opposition at such an early stage, relatively I, I'm less than optimistic, I guess, about this particular project. I do think maybe a lot will depend on what FERC does in this parallel proceeding, but I feel like they…”

Maeve Allsup Jun 25, 2026 ▶ 28:38 How data centers are complicating transmission expansion

Assertion Supported

NextEra aims to begin Mid-Atlantic Reliability Line construction in 2029

“They want to start construction in 2029, and the systems to make sure that data center customers can pay for that just don't exist.”

Maeve Allsup Jun 25, 2026 ▶ 14:11 How data centers are complicating transmission expansion

NextEra plans 100-mile Mid-Atlantic transmission line across PJM

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