A proposed 50 MW colocation facility from DC Blox would sit on a 1.6-acre first-phase parcel next to the Nashville Zoo, drawing objections from the zoo, more than 322,000 petition signers, and a mayor who calls the permit filing "unusual."
Data center siting fights usually turn on power and water. This one adds clouded leopards to the equation.
DC Blox has filed for a permit to build a 69,000-square-foot data center on a 1.6-acre parcel directly adjacent to the Nashville Zoo, and the proposal has become a flashpoint. The zoo has published a formal list of objections, an online petition opposing the project has crossed 322,000 signatures, and Nashville Mayor Freddie O'Connell has flagged the application itself as procedurally odd, asking the Metro legal department to investigate.
What's actually being proposed
The headline figure is a 50 MW draw from the local grid, with the facility reportedly including its own power substation. The 1.6-acre footprint represents only the first phase of a larger 23.5-acre lot currently owned by MarketStreet Enterprises. DC Blox says the build would use "closed-loop or waterless" cooling and would comply with all local ordinances.
Context matters on the power number. At 50 MW, this is not a hyperscale AI training campus. The largest AI buildouts under construction today are measured in thousands of acres and tens of gigawatts, three to four orders of magnitude beyond what DC Blox is describing here. A 50 MW colocation facility is closer to a conventional enterprise or multi-tenant operation. For comparison, the company's Birmingham facility uses air cooling and could draw up to 60 MW once fully built out. DC Blox explicitly states the Nashville site would "not be an AI factory placing a burden on local resources."
The qualifier worth watching is the company's own "AI-ready" marketing language. A site provisioned for AI workloads can see power and cooling demand climb over its operating life, and DC Blox's substation buildout suggests headroom. Any meaningful expansion would, in theory, require additional permits, but the trajectory of the broader colocation industry has been steadily upward on density. A facility that opens at 50 MW is not guaranteed to stay there.
Why the zoo objects
The Nashville Zoo's blog post lays out concerns that go beyond the usual grid-strain argument. Power draw is on the list, but so are noise, light pollution, and water quality in the surrounding area. The zoo argues these factors could harm hosted species and active breeding programs.
The clouded leopards are the specific worry. The zoo describes them as "notoriously sensitive to any mechanical noise," and a data center is, fundamentally, a building full of mechanical noise: chillers, fans, switchgear, and backup generators that test regularly. Even an air-cooled facility running well within ordinance limits produces a constant low-frequency hum that is difficult to attenuate at the property line. For a zoo running conservation programs on sensitive species, the operational profile of a colocation site sitting next door is a legitimate variable, not a hypothetical.
There's also an opportunity-cost angle. Zoo CEO Rick Schwartz says the organization had been in talks for years with MarketStreet to buy part of the 23.5-acre lot for an education and conservation center. MarketStreet's own website lists the Nashville Zoo as a current tenant, which makes the competing claims on the same land more pointed.
The permit problem
The procedural wrinkle may matter more than the technical specs. Local rules generally require that only landowners can apply for or support a building permit. DC Blox filed one without owning the parcel, which MarketStreet is still in the process of selling. There is no confirmation that MarketStreet co-signed or authorized the filing, and Mayor O'Connell has called the application "unusual" while directing the city's legal department to look into it.
DC Blox has noted that the area carried an existing data center permit, though there appear to be no records that such a facility was ever built. That detail cuts both ways: it supports the company's argument that data center use was previously contemplated for the site, while the absence of any actual construction undercuts the idea that the use is established.
The regulatory backdrop
Nashville already hosts roughly two dozen data centers, but none with a planned 50 MW grid pull, which makes this project an outlier locally even if it's modest by national standards. Tennessee law requires data centers to pay for any grid infrastructure upgrades they necessitate, which shifts some cost burden away from ratepayers. Beyond that, there are no city-specific data center regulations on the books.
That may not last. Nashville's leadership is weighing new restrictions on data center investment covering water, power, and noise, and one proposal under discussion would ban buildouts larger than 500,000 square feet outright. A 69,000-square-foot first phase sits well under that ceiling, but a regulatory regime built around water, power, and noise limits would speak directly to the zoo's objections.
The near-term outcome hinges less on cooling architecture than on who has standing to build on the lot. Until the land sale closes and the permit's legitimacy is resolved, the technical merits of a 50 MW colocation facility are a secondary question. For an industry accustomed to siting fights over gigawatt campuses in rural counties, a permit dispute decided by leopards and land titles in central Nashville is a reminder that the smaller, denser facilities pushing into urban parcels carry their own friction.
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