Data Center Registry

DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center

Rockwood, Roane County, Tennessee

OperatingNo reception on recordRecord updated September 21, 2026

DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center is an operating crypto mining site in Rockwood, Tennessee (Roane County), operated by DarkHorse Technologies Inc. (formerly Sphere 3D Corp.; site from Cathedra Bitcoin). The public record puts it at 10 MW operating.

Every line on this page traces to a public source listed at the bottom. Where a figure was looked for and not found, the row says so. A blank is never a zero.

Facility record

Operating

Operator: DarkHorse Technologies Inc. (formerly Sphere 3D Corp.; site from Cathedra Bitcoin)
Facility type: Crypto mining
Location: Rockwood, Roane County, TN
Coordinates: 35.8656, -84.6849 (approximate)
Power capacity: 10 MW operating
Land: Not established from a public source
Investment: Not established from a public source
Announced: Not established from a public source
Utility: Tennessee Valley Authority (local distributor not named)
Power source: Grid
Cooling: Not established from a public source
Water use: Not established from a public source
Jobs: Not established from a public source
Public subsidy: Not established from a public source
Community reception: No reception on record
Source confidence: Reported by at least one credible outlet or filing

Timeline from the record

Newest first. Record entries come from the filings and reports the registry cites. Coverage entries are headlines from publisher feeds we monitor daily, linked to the outlet; last checked September 14, 2026.

September 14, 2026
Operating
Listed as OPERATING at 10 MW (grid: TVA; planned use 'AI Inference Hosting') in DarkHorse's September 2026 investor presentation; Cathedra Bitcoin and Sphere 3D combined in June 2026 Source: SEC EDGAR / Sphere 3D Corp.

Opposition and litigation at this site

Nothing on record as of September 21, 2026. No lawsuit, organized opposition, or contested hearing over DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center in Rockwood, Roane County, Tennessee appears in the sources this registry tracks. That is an absence in our sources rather than a finding that none exists, and local opposition often predates any coverage a national dataset would pick up.

If you live near this site and something is happening that this page does not show, that is worth telling us. Send us the document and it goes in the record with the source attached. For sites where opposition is already established, see every contested site we track.

Power and water

Investor deck: GRID = TVA; company cites ~$49/MWh all-in power cost across its portfolio

Notes on the record

10 MW bitcoin-mining/hosting site in Rockwood, Tennessee that DarkHorse (ex-Sphere 3D/Cathedra) plans to convert to AI inference hosting; the company's May 2026 co-mining agreement hosts Bitdeer hardware across three TN/KY sites. Street address not disclosed in filings; pin is the Rockwood municipal centroid.

What the record does not establish, and the document that would

In every fight on our tracker the decisive fact came out of a public records request. These are the requests for this site.

Cooling method and water use
Tax abatements or other public subsidy
Permanent jobs promised
Land area
How the community has received it

Which document closes each gap

Cooling method and water use: The water service agreement, any groundwater appropriation permit, and the mechanical narrative in the site plan.
Tax abatements or other public subsidy: The abatement, PILOT, or development agreement approved by the county, city, or development authority, and the state's data center sales tax exemption certificate if one was issued.
Permanent jobs promised: The economic development application or incentive agreement, which usually states a job commitment and a clawback.
Land area: The rezoning application, the plat, or the deed recorded with the county.
How the community has received it: Planning commission and governing body minutes, public comment records, and any petition or lawsuit filed in the county.

Have one of these documents? Send it to us and we will add it to the record with attribution.

Other sites within 30 miles

Distances are between recorded coordinates, many of which are a city or county centroid, so treat them as approximate. Cumulative load on one utility and one aquifer is the question a planning commission rarely asks.

Oak Ridge Reservation AI Data Center Sites (DOE land lease) · Oak Ridge · U.S. Department of Energy17 mi · Proposed
CleanSpark West Crossville Bitcoin Mining Facility · Crossville · CleanSpark, Inc.20 mi · Operating
Oak Ridge Leadership Computing Facility (Frontier supercomputer) · Oak Ridge · Oak Ridge National Laboratory (UT-Battelle for the U.S. Department of Energy)21 mi · Operating
LCUB Data Center (Lenoir City Utilities Board) · Lenoir City · Lenoir City Utilities Board24 mi · Operating
CleanSpark Lenoir City Bitcoin Mining Facility · Lenoir City · CleanSpark, Inc.24 mi · Operating · 40 MW
CleanSpark Decatur Bitcoin Mining Facility · Decatur · CleanSpark, Inc.25 mi · Operating
CleanSpark Campbell Junction Bitcoin Mining Facility · Campbell Junction · CleanSpark, Inc.30 mi · Operating

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Questions people ask about this site

Is there opposition to the DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center in Rockwood?

Has anyone filed a lawsuit over the DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center?

No lawsuit over DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center appears in the record we track as of September 21, 2026. Residents most often reach a lawyer over water supply, well drawdown, noise from cooling plant, property value, or a rezoning approved without the notice the ordinance required. If any of that is happening near this site, it is worth a review whether or not a case has been filed yet.

How much water does DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center use?

No water withdrawal figure for DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center is on record here. Water use is rarely published voluntarily; it usually surfaces through a utility service agreement or a state withdrawal permit, both of which are public records. We leave the number blank rather than estimate one.

Who operates DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center, and how big is it?

DarkHorse Technologies Inc. (formerly Sphere 3D Corp.; site from Cathedra Bitcoin) is the operator on record. Capacity on record is 10 MW.

How to cite this page

SueDataCenters.org Data Center Registry, "DarkHorse Technologies (Cathedra Bitcoin) Rockwood Data Center," updated September 21, 2026, https://suedatacenters.org/data-centers/darkhorse-cathedra-rockwood-tn.

Facility data from Compute Atlas (E. Kubiak), version 1.34.0 (September 21, 2026), licensed CC BY 4.0, record https://www.compute-atlas.com/facilities/darkhorse-cathedra-rockwood-tn, retrieved October 1, 2026.

Corrections with a public source are welcome at the Compute Atlas record or through our contact page. The whole registry is available as CSV and JSON under CC BY 4.0.

Sources for this record

As compiled and cited by Compute Atlas, with our own reporting appended. Archived links are used where the original has moved.

1.Sphere 3D Corp. d/b/a DarkHorse Technologies, Investor Presentation dated September 14, 2026 (8-K exhibit 99.1): portfolio table lists 'Rockwood 10 MW total Tennessee TVA OPERATING' · SEC EDGAR / Sphere 3D Corp. · retrieved September 21, 2026
2.Sphere 3D Corp. Form 10-Q for the quarter ended June 30, 2026, ~53 MW across five data centers in Iowa, Kentucky and Tennessee; 30 MW Bitdeer co-mining arrangement across three TN/KY sites · SEC EDGAR / Sphere 3D Corp. · retrieved September 21, 2026
3.Sphere 3D press release dated September 8, 2026 (8-K exhibit): strategic review, Iowa divestiture, ~50 MW across four sites in Tennessee and Kentucky · SEC EDGAR / Sphere 3D Corp. · retrieved September 21, 2026

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