{ "schema_version": 1, "source_compilation_context": { "il": { "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/il.json", "updated": "2026-10-26" } }, "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": "17155", "label": "Putnam County, Illinois" }, "records": [ { "id": "sangha-systems-hennepin-il", "state": "il", "kind": "facility", "name": "Sangha Systems Hennepin (82 River North)", "group": "unknown", "status": "Status unclear", "raw_status": "", "status_field": "", "crypto": true, "type": "Crypto/HPC (inventory classification)", "counties": [ "Putnam" ], "city": "Hennepin", "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. Personally read public project context only; no whole-record certification. Identity, date, future-outcome, permit, capacity and financial scopes remain limited.. Public preview and caption only; full body not available and not bypassed. Caption says roughly one-third filled with servers at the historical observation, not one-third of power capacity, critical IT or current occupancy. Sangha is not named in readable caption, so operator crosswalk and 2026 status remain unverified. No operating certification, MW or financial claims adopted. Original approvals and later observed outcomes take precedence; future dates have no assumed result. Fields can apply to shared campus, regional or historical context; consult source review before assigning to a building.", "date": "", "events": [ [ "2020-11-12", "DPO published its November 12, 2020 original issuer report of mining at the Sangha Hennepin facility. This dates publication of a historical operating account, without an exact first operating day or independent verification of present computing service." ] ], "timeline": [], "opened": "", "tier": "", "sources": [ { "url": "https://pantagraph.com/business/from-bitcoins-to-atms-illinois-is-positioning-itself-as-a-center-for-the-cryptocurrency-industry/article_3415fc2f-2e64-578e-b660-d07b9fa45269.html", "host": "pantagraph.com", "date": "2021-06-19", "published": "2021-06-19", "checked": "2026-10-14", "date_kind": "publication", "label": "Reviewed source" }, { "url": "https://www.prnewswire.com/news-releases/digital-power-optimization-llc-begins-cryptocurrency-mining-operations-301172130.html", "host": "www.prnewswire.com", "published": "2020-11-12", "date": "2020-11-12", "checked": "2026-10-23", "label": "Reviewed operator source" }, { "url": "https://www.prnewswire.com/news-releases/sangha-systems-signs-a-letter-of-intent-with-aep-onsite-partners-to-bring-the-first-behind-the-meter-solar-development-to-a-cryptocurrency-mining-campus-in-north-america-will-use-sunified-sensors-301305259.html", "host": "www.prnewswire.com", "published": "2021-06-03", "date": "2021-06-03", "checked": "2026-10-23", "label": "Reviewed operator source" } ], "loc": { "lat": 41.20436, "lng": -89.28567, "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": "regional-development-review-round32-2026-10-14.json", "scope": "Personally read public project context only; no whole-record certification. Identity, date, future-outcome, permit, capacity and financial scopes remain limited.", "fields": { "reported_context": "Public Pantagraph/Chicago Tribune photo caption describes a 25,000-square-foot former steel-mill boiler house used for cryptocurrency mining in Hennepin, photographed June 14, 2021.", "independently_verified_current_operating_status": null, "operator_or_exact_site_identity_needs_crosswalk": true }, "notes": [ "Public preview and caption only; full body not available and not bypassed. Caption says roughly one-third filled with servers at the historical observation, not one-third of power capacity, critical IT or current occupancy. Sangha is not named in readable caption, so operator crosswalk and 2026 status remain unverified. No operating certification, MW or financial claims adopted.", "Original approvals and later observed outcomes take precedence; future dates have no assumed result.", "Fields can apply to shared campus, regional or historical context; consult source review before assigning to a building." ], "sources": [ { "url": "https://pantagraph.com/business/from-bitcoins-to-atms-illinois-is-positioning-itself-as-a-center-for-the-cryptocurrency-industry/article_3415fc2f-2e64-578e-b660-d07b9fa45269.html", "host": "pantagraph.com", "date": "2021-06-19", "published": "2021-06-19", "checked": "2026-10-14", "date_kind": "publication", "label": "Reviewed source" } ], "whole_record_certified": false }, { "overlay": "Codex 3 research cohort 60", "scope": "The original November 12, 2020 DPO issuer release explicitly reports initiating mining at the Sangha facility in Hennepin. This supports a historical issuer account, without independently confirming present 2026 computing stage or an exact original operating day. The separate June 3, 2021 Sangha solar letter of intent is prospective and does not prove completed solar generation, achieved environmental performance or current computing operation. Historical power, financial and future machine quantities are not exported.", "fields": { "current_stage_evidence": { "outcome": "historical_named_mining_account_present_stage_held", "scope": "The original November 12, 2020 DPO issuer release explicitly reports initiating mining at the Sangha facility in Hennepin. This supports a historical issuer account, without independently confirming present 2026 computing stage or an exact original operating day. The separate June 3, 2021 Sangha solar letter of intent is prospective and does not prove completed solar generation, achieved environmental performance or current computing operation. Historical power, financial and future machine quantities are not exported." }, "source_read_scope": { "complete_two_original_issuer_main_bodies_and_authorship_read": true, "solar_loi_not_completed_generation": true, "historical_service_not_present_2026_confirmation": true, "no_quantity_role_or_location_export": true } }, "notes": [ "The original November 12, 2020 DPO issuer release explicitly reports initiating mining at the Sangha facility in Hennepin. This supports a historical issuer account, without independently confirming present 2026 computing stage or an exact original operating day. The separate June 3, 2021 Sangha solar letter of intent is prospective and does not prove completed solar generation, achieved environmental performance or current computing operation. Historical power, financial and future machine quantities are not exported.", "Existing location, jurisdiction, provider roles, identities, quantities and physical opening dates remain unchanged. Proposal and administrative evidence do not certify computing operation." ], "sources": [ { "url": "https://www.prnewswire.com/news-releases/digital-power-optimization-llc-begins-cryptocurrency-mining-operations-301172130.html", "host": "www.prnewswire.com", "published": "2020-11-12", "date": "2020-11-12", "checked": "2026-10-23", "label": "Reviewed operator source" }, { "url": "https://www.prnewswire.com/news-releases/sangha-systems-signs-a-letter-of-intent-with-aep-onsite-partners-to-bring-the-first-behind-the-meter-solar-development-to-a-cryptocurrency-mining-campus-in-north-america-will-use-sunified-sensors-301305259.html", "host": "www.prnewswire.com", "published": "2021-06-03", "date": "2021-06-03", "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": "Hennepin · Putnam · Source context reviewed", "event_evidence": [ { "date": "2020-11-12", "text": "DPO published its November 12, 2020 original issuer report of mining at the Sangha Hennepin facility. This dates publication of a historical operating account, without an exact first operating day or independent verification of present computing service.", "kind": "announced", "sources": [ { "url": "https://www.prnewswire.com/news-releases/digital-power-optimization-llc-begins-cryptocurrency-mining-operations-301172130.html", "host": "www.prnewswire.com", "published": "2020-11-12", "date": "2020-11-12", "checked": "2026-10-23", "label": "Reviewed operator source" } ] } ], "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": "17155" } } ], "compilation_license": "withheld_pending_owner_decision" }