Energy

What to know about the nation’s first grid utilization metrics

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Briefings

Virginia's first public grid utilization metrics reveal a stark contrast between high-demand Data Center Alley and declining rural areas. Dominion Energy reported 41% annual utilization in northern Virginia between July 2025 and 2026, while Appalachian Power's rural area saw 14% utilization. The transmission grid in Data Center Alley experienced 2,530 hours of Post-Contingency Local Load Relief Warnings in 2023-2026, highlighting severe stress. Debates over whether to build new infrastructure versus improve efficiency are ongoing, with utilities proposing metrics that may take years to finalize.

Key points

• Dominion Energy reported an annual grid utilization rate of 41% in Virginia's Data Center Alley between July 2025 and 2026, indicating significant potential headroom for additional loads.
• Appalachian Power reported an annual grid utilization rate of 14% in rural Southwest Virginia, contrasting sharply with the high utilization in the booming northern Virginia corridor.

Context

This briefing covers Virginia's first public grid utilization metrics, which quantify how much electricity distribution systems are being used annually. The findings are critical for understanding grid stress in Data Center Alley, where transmission grid stress spiked to 2,530 hours of Post-Contingency Local Load Relief Warnings between 2023 and 2026. These metrics are part of a broader industry shift toward efficiency, with debates ongoing over whether to prioritize new infrastructure or existing technology improvements.

Limitations

Data is limited to Virginia utilities' filings for the period July 2025 to 2026. Finalizing standardized metrics may take years, and local constraints may vary significantly across feeders and substations. Some metrics, such as those counting solar and storage assets, may not reflect localized operational realities.

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