An energized bitcoin mining site gives an AI or HPC buyer the scarce part of a data center: a utility connection that already exists. The substation, the service agreement, the metered load history and the land usually carry over. The facility mostly does not. Expect to rebuild for redundancy, backup generation, liquid cooling, fiber and a hardened shell, and expect to renegotiate power terms, because mining loads are often built around curtailment while an AI tenant needs firm service. Evaluate the contract first, then the building.
Before you start
- The utility connection, substation and land are the assets; most mining buildings and electrical systems get rebuilt or demolished.
- Read the power contract for curtailment and interruptible terms before pricing a lease, since AI tenants need firm service.
- In Texas, check Load Resource status, SB 6 curtailment rules and whether the new load needs a Batch Zero study.
- Small 2 to 10 MW mining sites suit inference and edge deployments, not large training clusters.
Why energized mining sites are being converted
An AI or HPC buyer can wait years for a new large-load connection. A mining site that is already energized has the one thing that queue can't sell: a working utility connection with a known capacity and a metered history. Paces' 2025 analysis of ERCOT's 2028 summer-peak planning case found that only about 17% of substations near viable data center sites had positive withdrawal headroom. Land near a substation is common. Spare capacity at that substation is not.Paces
The public miners have moved first. Core Scientific's 10-Q for the quarter ended September 30, 2026 describes a strategic shift from mining for its own account to high-density colocation, with CoreWeave leases on 12-year initial terms and a second set of leases with AMD and a neocloud counterparty for about 530 MW of critical IT capacity across five of its sites. TeraWulf announced in August 2025 that Fluidstack's contracted critical IT load at its Lake Mariner campus in western New York had reached about 360 MW, with a Google backstop of about $3.2 billion. IREN signed an agreement with Microsoft on November 2, 2025 to provide GPU services at its Childress, Texas facilities, valued at about $9.7 billion over an average five-year term.U.S. Securities and Exchange Commission (EDGAR)U.S. Securities and Exchange Commission (EDGAR)U.S. Securities and Exchange Commission (EDGAR)
Read those filings closely and a pattern shows up. The power and the land carried over. Most of the rest was rebuilt, and some of it was torn down. Bitfarms' plan for its 18 MW former mining site near Moses Lake, Washington, filed with the city in January 2026, calls for demolishing the existing mining facility before building a liquid-cooled HPC and AI data center.Source ONE News
What carries over from a mining site
The utility service is the asset. That means the substation, the transformers, the service voltage, the interconnection or electric service agreement, and the billing history that proves the load actually ran. On the power evidence ladder Invariant uses, an energized and metered site sits on the top rung. But it sits there for the load that was approved. A 50 MW mining load with a curtailment arrangement and an AI load that expects firm service are different requests, and the utility may treat the second one as a new study.Creative Strategies
Land and site control usually carry over, along with whatever acreage was left for expansion. Some permits carry over too. Zoning that allowed a mining data center may or may not cover a building with a generator yard, cooling towers or dry coolers, and a larger fuel inventory. Check the use classification against the new design, not the old one.
- Utility service, substation and transformers, subject to confirming their rating and age.
- The interconnection or service agreement, after reading its curtailment, interruptibility and transfer terms.
- Metered load history, which is the best evidence a buyer can get that the MW figure is real.
- Land, easements and site control, including unused acreage for expansion.
- Some local approvals, after checking them against the new equipment list.
Creative Strategies calls the interconnection agreement a starting point. Mining sites often hang off one or two transmission lines and a small number of substation transformers. That was fine for a load that could drop off the grid without losing revenue it couldn't recover.Creative Strategies
Power contract terms: curtailment versus firm service
Many miners earn part of their margin by not running. In ERCOT, loads can take part in demand response by offering directly into the market or by cutting usage when wholesale prices rise, and a load or aggregation of loads can qualify through a QSE to provide ancillary services as a Load Resource. ERCOT also runs Emergency Response Service for loads that respond during grid emergencies. A Controllable Load Resource is a load that can raise or lower consumption to help hold grid frequency.ERCOTHusch Blackwell
An AI training cluster or a hosted inference platform does not want any of that. The tenant is paying for capacity it can use every hour. So the first document to pull is the power contract, and the first question is whether the site's MW figure assumed interruptible service. If the miner registered as a Load Resource, enrolled in a curtailment program, or bought power on a structure that depended on dropping load during peaks, that structure has to be unwound or replaced before a tenant signs.
Texas added a second layer in 2025. Senate Bill 6 treats loads of at least 75 MW as large loads, with the PUCT able to set a lower threshold. Large loads interconnected after December 31, 2025 must have equipment that lets ERCOT curtail them directly during firm load shed. Customers must disclose whether they keep on-site backup generation equal to at least half of the proposed load, and ERCOT can direct those customers to deploy that generation or curtail during an energy emergency. SB 6 also directs the PUCT and ERCOT to build a competitively procured demand reduction service for large loads.Bracewell
As of November 2026, ERCOT is running large-load interconnections of 75 MW or more through its Batch Zero study process under PGRR145, with 2026 deadlines for attestations and load information forms. If a conversion changes the load type, the ramp or the total MW at a site, ask the interconnecting utility in writing whether the request falls inside Batch Zero or needs a new study. Outside Texas the mechanics differ, but the question is the same: was this service approved as firm or as interruptible, and what does the utility need to change it?ERCOT
What you rebuild for an AI or HPC tenant
Ramboll's mission critical team lists what a crypto facility typically lacks for AI use: building reliability, backup power, cooling capacity, and redundancy in power and cooling. Creative Strategies puts numbers on the cooling gap. Mining racks run around 10 kW on air. Liquid cooling becomes necessary above roughly 30 to 40 kW per rack, and current AI racks run well past that.RambollCreative Strategies
Uptime commitments drive most of the rebuild. Uptime Institute defines Tier III as concurrently maintainable, meaning no shutdowns for equipment replacement and maintenance, and Tier IV as fault tolerant, where an individual equipment failure or path interruption does not reach IT operations. A mining hall has no reason to meet either. A colocation lease with service credits does.Uptime Institute
| Requirement | Typical bitcoin mining site | Typical AI or HPC tenant expectation |
|---|---|---|
| Power service | Large capacity, often with curtailment, demand response or price-based shutdowns | Firm service sized to contracted critical IT load plus cooling, with no routine curtailment |
| Transmission and substation | Often one or two lines and few transformers | Redundant transmission, transformation and distribution where the utility can offer it |
| Backup generation | Little or none | Generators and UPS sized to critical load, often with N+1 or 2N topology |
| Electrical redundancy | Minimal; downtime costs only lost hashrate | Concurrently maintainable (Tier III) or fault tolerant (Tier IV) design |
| Cooling | Air, with racks around 10 kW | Liquid cooling for racks above roughly 30 to 40 kW |
| Building shell | Light structures or containers built for airflow | Hardened building with floor loading, containment and space for cooling plant |
| Fiber and latency | One carrier is often enough | Diverse fiber routes; latency matters for inference and some HPC |
| Contract and credit | Self-owned or short hosting terms | Long-term leases, often with an investment-grade tenant or a backstop |
Fiber is the gap that surprises people. A mining site can run on one modest connection because hashing sends little data. Training clusters need high-bandwidth links out of the site, and inference needs low latency to users. Remote sites with no metro fiber nearby may need new diverse routes before any tenant will look at them.Creative Strategies
Then there is the money. Creative Strategies estimates AI-grade capex at roughly $6 million to $13 million per MW, against a few hundred thousand dollars per MW for mining, and notes that this usually needs an investment-grade tenant or a well-capitalized AI cloud operator on a long commitment. The public deals show it: TeraWulf's Lake Mariner leases came with a Google backstop of tenant obligations, and Core Scientific's CoreWeave leases run 12-year initial terms.Creative StrategiesU.S. Securities and Exchange Commission (EDGAR)U.S. Securities and Exchange Commission (EDGAR)
Small mining sites fit inference and edge, not training
Most of the US mining fleet isn't 300 MW campuses. Plenty of sites are 2 to 10 MW, often a few containers behind a single transformer at a substation or a gas field. Those sites are a poor match for frontier training, which wants hundreds of MW in one place with room to grow.
They can work for inference, rendering, smaller HPC jobs or edge deployments, where the buyer wants a few MW quickly and close to users or fiber. The questions shift. Distance to a metro and to carrier hotels matters more than total MW. Whether the utility will serve the same few MW as firm load matters more than expansion acreage. Be honest about the ceiling. A 5 MW site with no path to 50 MW will be priced as a 5 MW site.
Count the shrink as well. A mining site's MW figure is total utility capacity. After cooling overhead, redundancy and the loss of curtailment flexibility, the critical IT load an AI tenant can contract for is lower. Get the engineer's number for usable critical IT MW before quoting anything to a buyer.
Checklist for evaluating a mining site for conversion
Work through this before anyone prices a lease. Each line should end in a document, not an opinion.
- Pull the electric service or interconnection agreement. Record the contracted MW, the service voltage, any interruptible or curtailment terms, and whether the agreement can be assigned or amended for a new use.
- Get 12 to 24 months of interval meter data. Compare actual peak draw with the contracted figure.
- In ERCOT, confirm whether the load is registered as a Load Resource or Controllable Load Resource, enrolled in Emergency Response Service, or subject to SB 6 curtailment requirements, and what it takes to exit.
- Ask the utility in writing whether converting to firm data center load requires a new load study, and get the expected timeline.
- Inventory the substation: transformer ratings, age, number of incoming lines, and whether a second source is feasible.
- Have an engineer estimate usable critical IT MW after cooling and redundancy, for both N+1 and 2N designs.
- Check zoning and air permitting against the new equipment list, including generators and fuel storage.
- Map fiber: nearest long-haul and metro routes, carriers on site, and cost to build a diverse second path.
- Assess the building honestly. Price a retrofit against demolition and a new shell.
- Run the kill sheet: already under lease or option, publicly listed for sale, environmental liability, local moratorium.
Sites from our inventory that show the point
Mining sites in our inventory sit on very different rungs of the power evidence ladder, which decides whether a conversion is worth studying.
| Region | Power evidence | Land | Where it stands |
|---|---|---|---|
| Pennsylvania mining campus | 60 MW on-site plant plus a utility supply agreement for 350 MW (50 MW by end of 2026, 300 MW by end of 2027) in PJM. Rung 4. | About 33 acres at the plant | Kept. Documented power; land and redundancy are the work. |
| US, four-site package | 234 MW across four sites of 40 to 100 MW, described by the owner as secured with interconnection built. Rung 2. | Not disclosed | Watch list. Self-described; each site needs its own utility document before it can be priced. |
The first is a conversion candidate today. The second may be, once each site's service agreement is in hand. Locations, owners and documents are shared on a call.
How Invariant screens mining sites
Invariant treats a mining site as a power lead first. We rank it by the evidence behind the MW: a broker's capacity figure is a claim, a metered bill is proof that load ran, and an executed agreement for firm service at the new load is what a data center buyer needs. A site whose only path to firm power is a new study goes in the named-power-path tier with a date, not the documented-power tier. We check the contract terms and the kill list before anyone spends money on drawings, so a buyer sees what carries over and what they'll pay to rebuild before an introduction is made.
Questions that come up.
Can a bitcoin mining facility be converted into an AI data center?
Yes, and several public miners are doing it, but the conversion usually keeps the power connection and land and replaces most of the facility. Core Scientific now describes high-density colocation as its business, while Bitfarms plans to demolish its 18 MW Moses Lake mining building before building a liquid-cooled AI facility.U.S. Securities and Exchange Commission (EDGAR)Source ONE News
What is the biggest difference between a mining site and an AI data center?
Reliability. Mining can shut off when power is expensive or the grid is stressed, and many miners earn revenue doing so. AI tenants expect concurrently maintainable or fault tolerant facilities with backup power and firm utility service.Creative StrategiesUptime Institute
Does the interconnection agreement transfer when a mining site is converted?
The physical connection stays, but the terms may not fit the new load. Read the agreement for curtailment, interruptible service and assignment clauses, and ask the utility in writing whether a change to firm data center load requires a new study. In ERCOT, loads of 75 MW or more currently go through the Batch Zero process.ERCOT
How does Texas SB 6 affect converted mining sites?
SB 6 sets a 75 MW large-load threshold and requires large loads interconnected after December 31, 2025 to have equipment that lets ERCOT curtail them during firm load shed. It also requires disclosure of backup generation equal to at least half the load. A converted site that triggers new interconnection review should plan for these rules.Bracewell
Are small 5 MW mining sites useful for AI?
Usually for inference, edge or smaller HPC work rather than training. The deciding factors are firm service from the utility, fiber and distance to users, not total MW. Invariant screens small sites for those factors before suggesting them to a buyer.
Sources and references.
Primary sources checked for this guide on . The location, equipment, and operating plan determine which requirements apply to a project.
- PacesThe grid is planning for data centers that will never exist: Aligning transmission investment with development reality ↗
- U.S. Securities and Exchange Commission (EDGAR)Core Scientific, Inc. Form 10-Q for the quarter ended September 30, 2026 ↗
- U.S. Securities and Exchange Commission (EDGAR)IREN Ltd Form 10-Q for the quarter ended December 31, 2025 ↗
- U.S. Securities and Exchange Commission (EDGAR)TeraWulf announces Fluidstack expansion with 160 MW CB-5 lease at Lake Mariner (Exhibit 99.1) ↗
- Source ONE NewsBitfarms plans to turn former bitcoin mine near Moses Lake into AI data center ↗
- ERCOTDemand Response ↗
- Husch BlackwellIntegrating Bitcoin Miners into ERCOT: Critical Issues Come into Focus for Large Flexible Load Task Force ↗
- ERCOTLarge Load Integration ↗
- BracewellTexas Senate Bill 6 ushers in major overhaul of large load interconnection and grid access rules ↗
- Uptime InstituteExplaining the Uptime Institute's Tier Classification System (April 2021 Update) ↗
- Creative StrategiesFrom Bitcoin to AI: The Hard Road Ahead, and Why Some Miners Can Still Make the Jump ↗
- RambollConverting a bitcoin data center into an AI-focused data center ↗