Loudoun's Data Center Boom: Who Pays for $1.5 Billion in Transmission That Serves Hyperscalers?

Loudoun County holds more than 233 data center buildings and is seeing electricity demand unlike any previous commercial buildout^[1]. The county's concentration of hyperscaler facilities has created a textbook case of infrastructure subsidy: a utility requesting $1.5 billion in high-voltage transmission spending, with regulators now deciding whether that cost lands on residential customers or on the industry driving the load^[5].

Here is what the record shows and what it obscures. Dominion Energy expects nearly $7.6 billion in total transmission spending through 2031, and the company has said roughly 68% of that work is tied to data centers^[5]. That ratio alone is the scandal frame: a monopoly utility, claiming the greatest surge in electricity demand since World War II, is asking the public to fund the wires and substations that make hyperscale operations possible. Yet the terms of those special contracts between Dominion and the data center tenants remain largely confidential. What are the minimum-demand ratchets? How long are the terms matched against the 40-year life of transmission assets? Do these loads carry their own capital costs, or are they socialized into rates paid by every other customer class?^[5] The Virginia State Corporation Commission has the authority to answer those questions before it approves a dime. It has not done so publicly.

The mechanism is not new, but Loudoun amplifies it. A special contract is a negotiated tariff, typically filed with key economics redacted. A weak contract lets a hyperscaler lock in firm capacity and long terms while bearing little or no ratchet risk (a guarantee to pay for unused portions of reserved capacity). Unused capacity becomes ratepayer loss. Dominion's request documents that 68% of seven-year transmission plans serve data centers, yet the company has not disclosed which loads have signed which contracts, for how much minimum demand, or for what term. Without that disclosure, the commission cannot know whether it is approving decade-long assets serving loads that evaporate, or truly committed demand.^[2]

The protective mechanism exists and has been adopted in other states. A large-load tariff, filed as a standing customer class rather than sealed contracts, shifts risk back to the customer. Such tariffs typically include: (1) long terms matched to asset life (10 to 30 years), (2) high minimum-demand ratchets (paying for 80 to 90 percent of reserved capacity whether or not it materializes), (3) collateral and exit fees covering unamortized investment, and (4) 100 percent cost responsibility for dedicated network upgrades. Virginia has no such tariff on the books. The commission's next step is to condition Dominion's $1.5 billion request on the filing of a standardized large-load tariff that requires data center customers to bear the capital risk of the assets built for them. Absent that tariff, every residential bill in Virginia subsidizes the cloud infrastructure of a handful of hyperscalers.

The county's own 2021 analysis noted that data centers use 10 percent of Loudoun's water supply, and the electricity demand is now straining the grid so visibly that Chair Phyllis Randall called the county a canary in the coal mine^[2]. What Loudoun teaches the rest of the country is that growth in data center load is not inevitable; it is a policy choice, made in secret contracts and visible only in the rate hikes that follow. The window to change the terms is narrow. The Virginia State Corporation Commission should, before approving transmission spending tied to data centers, require Dominion to file a transparent large-load tariff that assigns capital costs and ratchet risk to the customer class driving the demand, not to residential ratepayers.