For weeks, this was a queue-math argument on paper. On July 22, it turned into a voltage disturbance that ran from D.C. to Chicago. Quick catch-up before we dig in: PJM's fight over large loads was already playing out on several fronts — capacity-market costs, backstop design, governance, federal oversight. Its market monitor attributed 6.3 billion dollars, or 38 percent of the latest auction charges, to data centers. And FERC has warned it could impose reforms if PJM doesn't act by September. This is The Data Center Daily — today, a grid that finally flinched, a governor putting his name on the answer to who pays, and a no-water pledge that just became a court exhibit. Sarah, start with that disconnect. We'll keep tracking PJM large-load integration plan — follow the show so the next update finds you. From Financial Post:
Call it a new normal for the US power system: Seasonal weather extremes overlap with the growing electricity needs of factories and the artificial intelligence sector. As households crank up air conditioners to cope with temperatures topping 100F (38C), power reserves shrink and decades-old transmission equipment is stressed.
Bloomberg's frame today sets up everything else on the grid this week: back-to-back heat waves, air conditioners maxed out, and RTOs built for an era of flat demand now managing power for 150 million people. Right, and that's the part I keep coming back to — these RTOs were designed during what Bloomberg literally calls somnolent demand growth. Now it's 100 degrees, and AI load runs around the clock. The machine was built for a nap, and we're asking it to sprint. The line that lands is “decades-old transmission equipment under stress.” We're talking about steel in the field, running hot, not a forecast or a queue number. And notice who's sharing the wire. Households cranking the AC and hyperscalers running flat-out on the same aging network. When reserves shrink, somebody's load gets managed — and I'd bet it isn't the data hall. The honest caveat: Bloomberg's not naming a specific failure here. It's laying out the conditions. The specific events are where this gets physical, and we'll get to those. Here's Tim McLaughlin at Reuters:
The epicenter of the event was in northern Virginia, home to the largest collection of data centers in the world. When an area transmission line went out of service Wednesday morning, the data centers' own control systems unplugged from the electric grid and transferred to backup power, Dominion Energy, the electric utility for the region, said in a statement.
This is the one I've been circling all week. A transmission line drops in northern Virginia, and the data centers' own control systems pull them off the grid and switch them to backup — all at once. That ripple ran from D.C. to Chicago. This is where PJM's large-load fight gets real. And look at the timing: Bob Marshall at Ting Labs says a normal disturbance gets corrected in milliseconds. This one took about ten minutes to settle. Right — and Dominion's line is “within minutes our team stabilized the situation.” Okay, but who made the call to disconnect? Was it a protection relay, or did facility controls decide the grid was unsafe and bail to diesel? Because those are very different stories. Dominion isn't saying, and that tells us something. What we know is that a localized outage in the densest data center cluster on earth rippled from D.C. to Chicago. That goes straight back to the heat-and-aging-grid story we just covered — except now we've seen it happen. We still don't have a megawatt number. Just a “massive amount of power.” I want the figure, because that number is the whole argument about whether the grid can take the next twelve gigawatts in queue. Brownwood News writes:
| AUSTIN – Governor Greg Abbott recently released the response from the Public Utility Commission of Texas (PUCT) and the Electric Reliability Council of Texas (ERCOT) to his June 10 directive that shows they are already taking concrete steps to protect residential ratepayers from the costs of data center expansion.
Finally — a governor's name on the answer. Abbott's order says data centers pay for the transmission built to serve them and kick in toward actually lowering residential bills. All week, I've been asking who eats this. Texas just answered. That second half goes further than anyone else has. Making the load pay its own way is the cost-allocation reform PJM's still chewing on. Requiring data centers to help lower residential bills goes a step beyond. Okay, but is this enforceable tariff language, or a press release with a bullet list stapled to it? Half of it reads like directions to the PUC: “developing standards,” “clarifying authority.” What's the actual rulemaking timeline? Some of it's concrete. New data centers have to curtail fast when ERCOT tells them to, and they have to register so the state knows what's connected. That has teeth after the disturbance across PJM on the 22nd. We just covered what can happen when a grid can't order load down in real time. Right — and then there's the Lone Star Infrastructure Protection Act, expanded so foreign actors can't use a data center to threaten the grid. ERCOT is looking at that same abrupt-disconnect scenario and saying, we want veto power over who's allowed to get that big. Texas has put its policy choice in writing: data centers cover the costs, and residential load gets protection. PJM's still staring at a September deadline and a governance fight. Here's TFTC:
Imperial Valley Computer Manufacturing (IVCM) filed suit against the Imperial Irrigation District (IID) seeking 260 million gallons of Colorado River water per year, directly reversing its public pledge since December 2025 to rely only on recycled wastewater.
Back in the spring, this was a pitch — “does not touch a single drop of the Colorado River.” I called that a wash. Well, now it's a court exhibit. IVCM is suing the Imperial Irrigation District for 260 million gallons a year of the very water they swore off. And the sequence matters. IID rejected the water application in early May. Their hand-picked board candidate lost the June primary, and then the lawsuit landed. They tried the ballot box first. 750,000 gallons a day. That's about what 7,300 Imperial County residents use in a year, per KPBS. So the “zero-draw” campus is now in front of a judge arguing for the equivalent of a small town's worth of river. This answers the enforcement question, honestly. A voluntary project-level water pledge carries no weight. The December pledge wasn't binding, and now the county supervisors who fast-tracked the project in April have switched to a moratorium. They've given a 19-member committee until 2027 to rewrite the rules. Hold every future “we won't touch the river” announcement up against this one. The promise and the price tag were never in the same document. If you track the infrastructure powering AI, check out AI IPO Watch for daily, sourced coverage of OpenAI, Anthropic, Databricks, and SpaceX going public — from filings and valuations to first trades. Find it wherever you listen to podcasts.
Imperial County's 19-member committee now has until 2027 to rewrite the county's data center development rules. We'll be watching that process.
You'll find links to every story in today's show notes if you want to spend more time with anything that caught your attention.
That's The Data Center Daily for today. This is a Lantern Podcast.