{ "schema_version": 1, "source_compilation_context": { "oh": { "attribution": { "inventory": { "name": "Compute Atlas", "creator": "Edward Kubiak", "url": "https://www.compute-atlas.com/api", "license": "CC BY 4.0", "license_url": "https://creativecommons.org/licenses/by/4.0/", "snapshot_url": "https://www.compute-atlas.com/api/facilities", "retrieved": "2026-10-14", "sha256": "79ad432dab7c128e428234c9d0dd40933114b415a4a5d697db00095637d50f37", "changes": "Added provenance, publication-date distinctions, display-safe wording, quarantine flags and state partitioning. Original source records retained locally." }, "counties": "U.S. Census Bureau county boundaries (public domain)", "research": "Field-specific source context. See the linked source and limits on each record." }, "source_data_url": "https://datacentersatlas.com/data/oh.json", "updated": "2026-10-24" } }, "scope": "Retained county context, which can be broad or unresolved. No parcel or municipal jurisdiction is inferred. Research records retain their sources, dates and location limits. Counts are not a census of operating buildings. Company name links alone do not establish ownership or operation.", "collection": { "kind": "counties", "key": "39111", "label": "Monroe County, Ohio" }, "records": [ { "id": "mara-hannibal-monroe-oh", "state": "oh", "kind": "facility", "name": "MARA Hannibal Data Center", "group": "operating", "status": "Operating phase", "raw_status": "partly operating", "status_field": "current_status", "crypto": true, "type": "Crypto/HPC (inventory classification)", "counties": [ "Monroe" ], "city": "Hannibal", "address": "", "who": "", "end_user": "", "mw": null, "power": "", "power_note": "", "investment": "", "jobs": "", "acres": null, "utility": "", "water": "", "incentives": "", "note": "Manual source context is available for this inherited inventory record. The inventory label and approximate geography are retained for discovery. This is not certification of current operation, ownership, a separate physical building, technical capacity or a precise parcel. Missing fields remain unknown. Originaloperator/issuer/government namedidentity,historicaltransaction orproposal/policycontext;notwhole-recordcurrentoperationcertification.. MARANov11,2024issuerreportsNov5closingHannibal/Hopedaletwosites.222MWINTERCONNECTAPPROVEDcombined,122MWthenoperatingcombined,100MWremainingexpansion;noindividualsplit. SeparateFindlay150MWplan,30MWthenoperatingcreates372approved/152operating/220developmentAGGREGATE. Not372MWineachsite,notallAIIT. End2025targetnotobserved2026energization.270USD/kWacquisitionmultiple=270000USD/MW,not270Mcapex. Hopedalepreviouslyhostednowacquired;potential50%costsavingnotactualmeteredresult. 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This is the dated company filing, not an exact existing facility opening or commissioning of future HPC capacity." ] ], "timeline": [], "opened": "", "tier": "", "sources": [ { "url": "https://ir.mara.com/news-events/press-releases/detail/1375/mara-adds-372-megawatts-of-capacity-in-ohio-with-152-megawatts-operational-and-220-megawatts-in-development", "host": "ir.mara.com", "date": "", "published": "", "checked": "2026-10-14", "date_kind": "publication date not established", "label": "Reviewed source" }, { "url": "https://ir.mara.com/sec-filings/all-sec-filings/content/0001507605-26-000022/0001507605-26-000022.pdf", "host": "ir.mara.com", "published": "2026-08-06", "date": "2026-08-06", "checked": "2026-10-23", "label": "Reviewed government record" } ], "loc": { "lat": 39.72734, "lng": -81.08295, "precision": "county", "basis": "Shown at county level only. The dot is placed inside the county for the map and is not the site, its address or a parcel." }, "reviewed_evidence": [ { "overlay": "operator-and-government-review-round46-2026-10-14.json", "scope": "Originaloperator/issuer/government namedidentity,historicaltransaction orproposal/policycontext;notwhole-recordcurrentoperationcertification.", "fields": { "named_original_context": "MARANov11,2024issuerreportsNov5closingHannibal/Hopedaletwosites.222MWINTERCONNECTAPPROVEDcombined,122MWthenoperatingcombined,100MWremainingexpansion;noindividualsplit. SeparateFindlay150MWplan,30MWthenoperatingcreates372approved/152operating/220developmentAGGREGATE. Not372MWineachsite,notallAIIT. End2025targetnotobserved2026energization.270USD/kWacquisitionmultiple=270000USD/MW,not270Mcapex. Hopedalepreviouslyhostednowacquired;potential50%costsavingnotactualmeteredresult." }, "notes": [ "MARANov11,2024issuerreportsNov5closingHannibal/Hopedaletwosites.222MWINTERCONNECTAPPROVEDcombined,122MWthenoperatingcombined,100MWremainingexpansion;noindividualsplit. SeparateFindlay150MWplan,30MWthenoperatingcreates372approved/152operating/220developmentAGGREGATE. Not372MWineachsite,notallAIIT. End2025targetnotobserved2026energization.270USD/kWacquisitionmultiple=270000USD/MW,not270Mcapex. Hopedalepreviouslyhostednowacquired;potential50%costsavingnotactualmeteredresult.", "Sharedaggregatepower/generation,unknownITbasisanddate-rolelimitationscontrol." ], "sources": [ { "url": "https://ir.mara.com/news-events/press-releases/detail/1375/mara-adds-372-megawatts-of-capacity-in-ohio-with-152-megawatts-operational-and-220-megawatts-in-development", "host": "ir.mara.com", "date": "", "published": "", "checked": "2026-10-14", "date_kind": "publication date not established", "label": "Reviewed source" } ], "whole_record_certified": false }, { "overlay": "Codex 3 research cohort 33", "scope": "MARA quarterly filing signed August 6, 2026 expressly identifies existing Hannibal data center operations as adjacent to the planned Long Ridge acquisition. Operating phase applies to that named existing component as reported for the filing period. The proposed power plant acquisition, prospective HPC buildout, future energization and companywide revenue are separate. The filing says the acquisition had not closed at June 30; it is not used to determine any later closing. No capacity, current role or all future campus operation is promoted.", "fields": { "current_stage_evidence": { "outcome": "quarterly_filing_named_existing_hannibal_operations_not_future_long_ridge_hpc", "scope": "MARA quarterly filing signed August 6, 2026 expressly identifies existing Hannibal data center operations as adjacent to the planned Long Ridge acquisition. Operating phase applies to that named existing component as reported for the filing period. The proposed power plant acquisition, prospective HPC buildout, future energization and companywide revenue are separate. The filing says the acquisition had not closed at June 30; it is not used to determine any later closing. No capacity, current role or all future campus operation is promoted." } }, "notes": [ "MARA quarterly filing signed August 6, 2026 expressly identifies existing Hannibal data center operations as adjacent to the planned Long Ridge acquisition. Operating phase applies to that named existing component as reported for the filing period. The proposed power plant acquisition, prospective HPC buildout, future energization and companywide revenue are separate. The filing says the acquisition had not closed at June 30; it is not used to determine any later closing. No capacity, current role or all future campus operation is promoted.", "The review preserves existing identity, roles, locations, jurisdictions, quantities and physical opening fields. Source publication, checked dates and physical milestones remain distinct." ], "sources": [ { "url": "https://ir.mara.com/sec-filings/all-sec-filings/content/0001507605-26-000022/0001507605-26-000022.pdf", "host": "ir.mara.com", "published": "2026-08-06", "date": "2026-08-06", "checked": "2026-10-23", "label": "Reviewed government record" }, { "url": "https://ir.mara.com/news-events/press-releases/detail/1375/mara-adds-372-megawatts-of-capacity-in-ohio-with-152-megawatts-operational-and-220-megawatts-in-development", "host": "ir.mara.com", "published": "2024-11-11", "date": "2024-11-11", "checked": "2026-10-23", "label": "Reviewed operator source" } ], "checked": "2026-10-23", "whole_record_certified": false } ], "manual_source_reviewed": true, "whole_record_certified": false, "field_evidence_present": true, "inventory_label_retained": true, "precision_label": "Exact site not published; shown at county level", "summary": "Hannibal · Monroe · Source context reviewed", "status_scope": "MARA quarterly filing signed August 6, 2026 expressly identifies existing Hannibal data center operations as adjacent to the planned Long Ridge acquisition. Operating phase applies to that named existing component as reported for the filing period. The proposed power plant acquisition, prospective HPC buildout, future energization and companywide revenue are separate. The filing says the acquisition had not closed at June 30; it is not used to determine any later closing. No capacity, current role or all future campus operation is promoted.", "event_evidence": [ { "date": "2026-08-06", "text": "MARA signed its quarterly filing August 6, 2026, identifying existing Hannibal data center operations beside the contemplated Long Ridge assets. This is the dated company filing, not an exact existing facility opening or commissioning of future HPC capacity.", "kind": "announced", "sources": [ { "url": "https://ir.mara.com/sec-filings/all-sec-filings/content/0001507605-26-000022/0001507605-26-000022.pdf", "host": "ir.mara.com", "published": "2026-08-06", "date": "2026-08-06", "checked": "2026-10-23", "label": "Reviewed government record" } ] } ], "location_display": { "policy": "reviewed-map-references-2026-10-23", "decision": "withheld_unreviewed_point", "scope": "The available point evidence does not establish a supported site location. No site pin, nearby distance or aerial destination is published. The original coordinate and its provenance remain in research history.", "county_display": "39111" } } ], "compilation_license": "withheld_pending_owner_decision" }