Sphere 3D offers substation funding for 50MW Kentucky data center

A crypto miner with $2.5 million in second-quarter revenue wants to build a 50MW data center in Hopkinsville, Kentucky, and has offered to foot the bill for the substation that would power it. Sphere 3D's North Campbell Land Co. subsidiary put the proposal before a July 27 public hearing on data center zoning as part of a two-step plan: a new 50MW facility at a separate, still-undisclosed site, and the conversion of the company's existing 15MW Bitcoin mining operation at the Holland Substation to AI and high-performance computing workloads.

North Campbell has offered to fund a 65MW substation for Hopkinsville Electric System at an estimated cost of $8-10 million, with roughly 50MW reserved for the data center and the remaining 15MW available to other HES customers. HES general manager Jeff Hurd told city council members this month that the Tennessee Valley Authority could supply the added capacity without disturbing service to the utility's approximately 13,000 existing customers, and that the substation could be ready in six to 12 months, though no overall development schedule has been confirmed.

Neither project has received approval, no prospective AI or HPC customers have been disclosed, and the existing mining site has run for roughly three years with about 22 modular computing units in a flexible-load program that lets HES reduce or halt its electricity consumption during periods of high demand. A mining operation that can be switched off behaves differently on the grid than an AI data center expecting round-the-clock power, and the zoning debate unfolding in Hopkinsville is, at bottom, about what kind of customer the city wants.

Sphere 3D is effectively buying its way into the interconnection queue, and the $8-10 million substation payment is a developer-funded grid upgrade in the same economic logic that has shaped bigger deals across this cycle. TVA's data center rate hike prices capacity upfront, with a $1.5 million per megawatt capacity charge on new connections; at that tariff, 50MW of new capacity would carry a $75 million charge, making the substation offer a smaller, site-specific version of the same principle. The developer pays for capacity, the utility covers its costs, and existing customers are insulated.

Hurd says the new substation could be ready within six to 12 months, and the buildout would begin with the conversion of the existing mining operation — sequencing that suggests Sphere 3D sees the 15MW conversion as the pilot and the 50MW as the prize. It is a miniaturized version of a familiar pattern, where bitcoin miners repurpose their power assets to chase AI workloads, and whether the company can pull it off depends on capital and customers, neither of which is visible in the filing.

Hopkinsville does not yet classify data centers as a separate land use; the city is writing its first rules, and a July working draft would classify facilities using less than 75MW and occupying less than 50,000 square feet as large-scale data centers subject to a 1,000-foot setback from neighboring residential, public, and quasi-public properties. Facilities using at least 75MW or occupying 50,000 square feet or more would be classified as hyperscale and prohibited. At 50MW, Sphere 3D's proposed facility sits on the allowed side of the capacity line, but its physical footprint has not been disclosed; if the building crosses the square-footage threshold, the same project would be barred as hyperscale. That is a zoning knife-edge.

The proposal surfaced inside a public hearing on the zoning rules themselves, and Community and Development Services is expected to hold a second hearing before making a recommendation to the city council. Community consent has become a major obstacle in data center siting, with pre-application opposition forcing developers to front-load political capital; Hopkinsville is unusual in that the opposition is still in draft form. That gives the developer a chance to shape the rules, but the city is also deciding whether to write a hyperscale ban into its first data center zoning rules.

For all the infrastructure detail, this is a small company making a very large claim. North Campbell became a wholly owned subsidiary of Sphere 3D when the company acquired Cathedra Bitcoin in June; the combined business operates approximately 53MW across Iowa, Kentucky, and Tennessee, with a claimed development pipeline exceeding 100MW. Against that revenue base, the proposed 50MW site alone would nearly double the company's operating capacity, on paper, before a single new customer appears.

Without a disclosed tenant, a 50MW data center is a land lease, a substation order, and a power purchase application awaiting a balance sheet. The digital infrastructure story of this cycle has been built on hyperscaler demand and the pricing that follows it; hyperscaler-anchored assets get infrastructure pricing while everything else fights for capital. Sphere 3D is not that story — it is a crypto miner seeking to convert its power assets into a capital-lite platform, and the market will price that ambition accordingly. The substation is the only concrete asset in the filing; the 50MW is an option that expires without a customer.

The next hearing will not tell investors whether the AI conversion works — that depends on customers who have not appeared — but it will answer a narrower question: whether Hopkinsville sees a 50MW data center as an economic development win worth a substation investment, or as a 1,000-foot problem. Sphere 3D gets to find out which before it spends the money.