TeraWulf Doubles Muskie Contracted Power Capacity to 1 GW, Eyes More Secured Debt

TeraWulf has expanded the contracted power backing its Muskie Data Campus in eastern Kentucky to 1 gigawatt and said it is also pursuing more secured borrowing to support its broader buildout of power-intensive digital infrastructure. The company said an amended and restated electric service agreement with Kentucky Power doubles Muskie’s contracted capacity from 500 megawatts to 1 GW and pulls forward the second 500 MW phase by about a year.

The financing update came in the same October 5 filing cycle. TeraWulf said it intends to increase the size of its existing senior secured revolving credit facility and is also seeking additional senior secured debt to support letter-of-credit needs tied to its long-term utility development partnerships. The company did not disclose a target size, pricing or timing for any new debt raise, and it cautioned that there can be no assurance it will obtain additional financing.

The expansion matters because Muskie is one of the company’s key Kentucky growth projects and because the company has spent much of 2026 trying to reposition itself as a large-scale AI and high-performance computing infrastructure developer rather than only a bitcoin-mining operator. In its October 5 announcement, TeraWulf said the amended utility agreement advances delivery of Muskie’s second 500 MW phase into 2029 from 2030, while the initial 500 MW remains expected to ramp beginning in 2028.

That shift is an acceleration in contracted power timing, not a reinvention of the site’s overall ambition. When TeraWulf bought the Muskie campus in May, it described the property as a gigawatt-scale development site expected to support more than 1 GW of data-center capacity over time. What has changed now is that the company says the utility agreement itself has been enlarged from 500 MW to 1 GW, giving it firmer backing for the full scale it had previously outlined.

What changed at the Muskie campus

Muskie sits in Grayson, Kentucky, within the EastPark Industrial Park, and has become one of TeraWulf’s most important pipeline projects. In the May acquisition announcement, the company said the campus included roughly 285 acres of owned and controlled land with optional adjacent acreage and that Kentucky Power was building a 345 kV substation connected to a 765 kV transmission network to support the broader development plan. At that point, the project was already being framed as a utility-scale campus with a long runway for phased construction.

The latest amendment makes the near-term power path more concrete. TeraWulf said contracted electric service at Muskie now totals 1 GW, up from 500 MW previously. The second phase also moves into 2029, which is important because it narrows the gap between initial delivery and full campus ramp. The company said the revised timeline remains subject to Kentucky Public Service Commission approval and Kentucky Power’s construction schedule, so the new 2029 target is not unconditional.

TeraWulf also tied the development to Kentucky Governor Andy Beshear’s 2026 executive order on data-center development, a reminder that the company is trying to grow in jurisdictions that are actively courting large digital-infrastructure projects. The first 500 MW is still expected to begin ramping in 2028, which means Muskie remains a medium-term project rather than a near-immediate earnings driver.

That timing matters when investors think about capacity headlines. A doubling from 500 MW to 1 GW sounds like a large immediate increase, but it does not mean 1 GW of operating data-center load is coming online at once. It means the contracted utility pathway has expanded, with delivery still phased over multiple years and dependent on infrastructure work, customer demand and the usual execution risks that come with hyperscale development.

Why TeraWulf is lining up more secured debt

The company’s financing language was more limited than the power announcement but still notable. In its Form 8-K, TeraWulf said it intends to upsize its existing senior secured revolving credit facility and seek additional senior secured debt. Management linked that plan to letter-of-credit requirements associated with long-term power development partnerships with utilities. That is a specific use case, not a general statement that it simply wants extra cash on the balance sheet.

Letter-of-credit support is a meaningful issue for a developer pursuing several large campuses at once. Utility arrangements for very large loads can require collateral, security postings or other credit backing before full power buildout is delivered. For TeraWulf, that means financing capacity is not just about funding construction. It is also about preserving enough flexibility to support utility commitments while still building Lake Mariner, Justified, Muskie and other parts of its platform.

The company has previously emphasized that it is trying to pair infrastructure expansion with long-duration customer contracts and project-level financing. In its second-quarter results in August, TeraWulf said it ended June with about $3.0 billion of cash and restricted cash and highlighted the Muskie campus as part of a controlled pipeline of future capacity. Even so, the company is developing multiple large projects at the same time, and expanding secured borrowing could help it meet utility-credit needs without relying only on cash balances.

There is also an important limitation for investors: TeraWulf did not announce a completed financing, only an intention to pursue one. There was no principal amount, no lender lineup and no interest-rate disclosure in the October 5 filing. For that reason, the debt portion of the story is best read as a financing strategy update rather than a finished capital-markets deal.

What comes next for execution and approvals

TeraWulf’s immediate next steps are mostly operational and regulatory. The utility amendment’s accelerated second phase still depends on the Kentucky Public Service Commission and on Kentucky Power’s own construction schedule. The company also still needs to convert its growing portfolio of power-backed campuses into revenue-generating leased or self-operated capacity over time.

Muskie is only one part of that broader platform. TeraWulf has been expanding its Lake Mariner campus in New York, pushing forward the Justified Data Campus in Kentucky and pursuing the Chesapeake Data Campus in Maryland. Management has tried to present those sites as a repeatable model: secure a power-advantaged location, line up utility and transmission infrastructure, win long-term customer demand, then finance and build in phases. Muskie fits that pattern because the real bottleneck is not branding or land assembly alone, but dependable large-load power.

For now, the most consequential verified change is straightforward. TeraWulf has doubled the contracted power capacity at Muskie to 1 GW and moved the second 500 MW phase forward to 2029. Separately, it has signaled that more secured borrowing may be needed to support the credit demands that come with those utility relationships. The next concrete milestone is whether the utility and regulatory steps stay on schedule as the company tries to turn a power-backed development pipeline into operating capacity and contracted cash flow.