{ "generated_at": "2026-07-29T19:58:37.919782+00:00", "generator": "Project Helios", "disclaimer": "Helios infers development activity from public records. Confidence scores are model output, not fact. Helios does not assert the identity of any facility operator unless a direct filing establishes it. Estimates are labelled as such and must not be cited as measurements.", "site": { "project_code": "AZ-MESA-001", "jurisdiction": "Mesa", "county": "Maricopa", "site_kind": "hyperscale_campus", "site_kind_assertion": "reported", "current_stage": 7, "current_stage_label": "Operational", "current_confidence": 64.06, "total_acres": 83.1715, "first_signal_date": "2013-11-04", "latest_signal_date": "2026-07-28", "operator_status": "not_established", "summary": "1 parcel(s) totalling 83.2 acres near 3740 S SIGNAL BUTTE RD, Mesa. Title of record is held by PLATYPUS DEVELOPMENT LLC. Helios has not established which organization, if any, operates or will operate a facility here.", "boundary": { "type": "MultiPolygon", "coordinates": [ [ [ [ -111.60129264309101, 33.34967860471465 ], [ -111.60122847373532, 33.34364492792027 ], [ -111.60133918929746, 33.34364416772195 ], [ -111.60158942130806, 33.34364092580972 ], [ -111.6018490838325, 33.34363756082481 ], [ -111.60185239951423, 33.34363751804957 ], [ -111.60185019684515, 33.34376352403883 ], [ -111.60185019684515, 33.343763564562686 ], [ -111.60185000370737, 33.34377459605345 ], [ -111.60198194376471, 33.34388366890512 ], [ -111.60220917800574, 33.34388220404517 ], [ -111.60220962536674, 33.34393105996412 ], [ -111.60233417408593, 33.34393042809354 ], [ -111.60233422528992, 33.343930427343096 ], [ -111.60402679591397, 33.34391974707808 ], [ -111.60618894288645, 33.34390606805215 ], [ -111.6062191199918, 33.34646645114812 ], [ -111.60729165813538, 33.34646079899726 ], [ -111.60729976363419, 33.346460755473046 ], [ -111.6073384370055, 33.349764670724 ], [ -111.60732213797299, 33.34976459418422 ], [ -111.60326645287431, 33.34974543973011 ], [ -111.60314509766594, 33.349744864180984 ], [ -111.60314509946258, 33.34974466757876 ], [ -111.60314528002397, 33.34971737964039 ], [ -111.60313041021107, 33.34971731060449 ], [ -111.60132819840997, 33.34970882068843 ], [ -111.60129264309101, 33.34967860471465 ] ] ] ] } }, "evidence": [ { "id": "bddbcef9-4aad-4721-9ec1-56d6570c4a0f", "evidence_kind": "shell_entity_ownership", "summary": "Title is held by PLATYPUS DEVELOPMENT LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC); minimal descriptive name). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent.", "snippet": "OwnerName = PLATYPUS DEVELOPMENT LLC", "snippet_locator": "$.features[6].attributes.OwnerName", "observed_at": "2013-11-04", "assertion_class": "inferred", "extraction_method": "pattern_rule", "polarity": "supporting", "confidence": 0.45, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "owner_name", "value": "PLATYPUS DEVELOPMENT LLC", "locator": "$.features[6].attributes.OwnerName", "raw_text": "PLATYPUS DEVELOPMENT LLC", "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "is_standing_condition": false }, "source": { "document_id": "2f6efd07-7c10-4f43-94f2-5b714de87e97", "document_version_id": "4f91c5f4-4b77-4df5-b8c8-7edca03375aa", "source_slug": "maricopa-assessor-parcels", "source_name": "Maricopa County Assessor Parcel Layer", "agency": "Maricopa County Assessor / Maricopa County GIS", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "77af6d6d43febde9b56073b5a2200e2713b9331b31345f146047d2723a8a5008", "parser_version": "0.1.0", "attribution_text": "Parcel data courtesy of Maricopa County Assessor / Maricopa County GIS." } }, { "id": "2f91c51c-8a36-45a0-8ff8-4b1e791f594d", "evidence_kind": "large_industrial_parcel_acquisition", "summary": "Organization-held industrial parcel of 83.2 acres transferred for $113,576,875 on 2013-11-04, at or above the 20-acre campus-scale threshold.", "snippet": "DeedNumber = 20130962087; DeedDate = 2013-11-04; LotSize_Acre = 83.17146", "snippet_locator": "$.features[6].attributes.DeedDate", "observed_at": "2013-11-04", "assertion_class": "reported", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.9, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "lot_size_acres", "value": 83.1715, "locator": "$.features[6].attributes.LotSize_Acre", "raw_text": "83.17146", "raw_unit": "acres", "confidence": 0.95, "assertion_class": "reported", "normalized_unit": "acres", "extraction_method": "structured_feed" }, { "name": "deed_number", "value": "20130962087", "locator": "$.features[6].attributes.DeedNumber", "raw_text": "20130962087", "raw_unit": null, "confidence": 0.98, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "is_standing_condition": false }, "source": { "document_id": "2f6efd07-7c10-4f43-94f2-5b714de87e97", "document_version_id": "4f91c5f4-4b77-4df5-b8c8-7edca03375aa", "source_slug": "maricopa-assessor-parcels", "source_name": "Maricopa County Assessor Parcel Layer", "agency": "Maricopa County Assessor / Maricopa County GIS", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "77af6d6d43febde9b56073b5a2200e2713b9331b31345f146047d2723a8a5008", "parser_version": "0.1.0", "attribution_text": "Parcel data courtesy of Maricopa County Assessor / Maricopa County GIS." } }, { "id": "a8d607ba-d6b1-47db-aa01-54fc55ac7c8e", "evidence_kind": "substation_application", "summary": "ACC docket E-01345A-22-0148: Initial CEC application \u2014 Signal Butte Substation. Filed by Arizona Public Service Company on 2022-06-14. Helios ingested a recorded fixture, not a live scrape.", "snippet": "Requests approval to construct a 230/69 kV substation and short loop-in of an existing 230 kV circuit near S Signal Butte Road, Mesa.", "snippet_locator": "$.docket.filings[0]", "observed_at": "2022-06-14", "assertion_class": "extracted", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.85, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "docket_number", "value": "E-01345A-22-0148", "locator": "$.docket.docket_number", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "utility_name", "value": "Arizona Public Service Company", "locator": "$.docket.utility_name", "raw_text": null, "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "filing_category", "value": "substation_application", "locator": "$.docket.filings[0].category", "raw_text": null, "raw_unit": null, "confidence": 0.9, "assertion_class": "extracted", "normalized_unit": null, "extraction_method": "pattern_rule" } ], "permit_id": "1aae4b81-7d4c-4851-8a92-5be720299ba1", "is_standing_condition": false }, "source": { "document_id": "7d9fc4fa-afdf-4ba6-8fff-03009244f637", "document_version_id": "bb12ebbc-7d58-4b3f-9cec-04cb380e48a4", "source_slug": "azcc-edocket", "source_name": "Arizona Corporation Commission eDocket", "agency": "Arizona Corporation Commission", "source_url": "https://edocket.azcc.gov/search/docket-search", "retrieved_at": "2026-07-28T17:30:31.282291Z", "content_sha256": "c3c1150bf8f6907a483612a4f43d19afe9814f38215a0a65ce0d5b6f78128055", "parser_version": "0.1.0", "attribution_text": null } }, { "id": "51cc44dd-e284-4f9e-86e0-1acee10e122e", "evidence_kind": "substation_application", "summary": "ACC docket E-01345A-22-0148: Amended single-line and site plan. Filed by Arizona Public Service Company on 2023-01-09. Helios ingested a recorded fixture, not a live scrape.", "snippet": "Updates the proposed substation footprint and confirms 230 kV loop-in alignment.", "snippet_locator": "$.docket.filings[1]", "observed_at": "2023-01-09", "assertion_class": "extracted", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.85, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "docket_number", "value": "E-01345A-22-0148", "locator": "$.docket.docket_number", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "utility_name", "value": "Arizona Public Service Company", "locator": "$.docket.utility_name", "raw_text": null, "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "filing_category", "value": "substation_application", "locator": "$.docket.filings[1].category", "raw_text": null, "raw_unit": null, "confidence": 0.9, "assertion_class": "extracted", "normalized_unit": null, "extraction_method": "pattern_rule" } ], "permit_id": "b81a8dee-3df9-47e1-bdd6-5fa1ff869811", "is_standing_condition": false }, "source": { "document_id": "7d9fc4fa-afdf-4ba6-8fff-03009244f637", "document_version_id": "bb12ebbc-7d58-4b3f-9cec-04cb380e48a4", "source_slug": "azcc-edocket", "source_name": "Arizona Corporation Commission eDocket", "agency": "Arizona Corporation Commission", "source_url": "https://edocket.azcc.gov/search/docket-search", "retrieved_at": "2026-07-28T17:30:31.282291Z", "content_sha256": "c3c1150bf8f6907a483612a4f43d19afe9814f38215a0a65ce0d5b6f78128055", "parser_version": "0.1.0", "attribution_text": null } }, { "id": "f04d5836-ce85-42ae-b10a-30cc46f0642c", "evidence_kind": "grading_or_construction_permit", "summary": "City of Mesa commercial building permit PMT26-07994 at 3740 S SIGNAL BUTTE RD, opened 2026-04-27, status: Issued - Permit approved and issued and in inspection phase. Matched to parcels by normalized address; no coordinates in source.", "snippet": "PMT26-07994; COM; 3740 S SIGNAL BUTTE RD; Issued - Permit approved and issued and in inspection phase", "snippet_locator": "$[28]", "observed_at": "2026-07-15", "assertion_class": "reported", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.75, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "permit_number", "value": "PMT26-07994", "locator": "$[28].permit_number", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "property_address", "value": "3740 S SIGNAL BUTTE RD", "locator": "$[28].property_address", "raw_text": null, "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "permit_type", "value": "COM", "locator": "$[28].permit_type", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "permit_id": "0d959345-7e65-4d2e-ae8e-7a89e555eb24", "address_match": { "apn": "30433005S", "method": "address_normalized_exact", "confidence": 0.92, "normalized": "3740 S SIGNAL BUTTE RD" }, "is_standing_condition": false }, "source": { "document_id": "6cb33a37-a587-4e9f-95af-a4847ee970d1", "document_version_id": "ae2d41ce-1f4e-4048-8ccc-2dc64b639b98", "source_slug": "mesa-building-permits", "source_name": "City of Mesa Building Permits", "agency": "City of Mesa", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "55cca827c96128ee340c6e8ac9570c08511f3a17edfa1c5f11187e55ee6c65f5", "parser_version": "0.1.0", "attribution_text": null } }, { "id": "8129e41c-b257-4648-8878-9c9eb8ad8351", "evidence_kind": "grading_or_construction_permit", "summary": "City of Mesa commercial building permit PMT26-12780 at 3740 S SIGNAL BUTTE RD, opened 2026-07-13, status: In Review - Plans are being reviewed or awaiting revisions. Matched to parcels by normalized address; no coordinates in source.", "snippet": "PMT26-12780; COM; 3740 S SIGNAL BUTTE RD; In Review - Plans are being reviewed or awaiting revisions", "snippet_locator": "$[9]", "observed_at": "2026-07-22", "assertion_class": "reported", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.75, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "permit_number", "value": "PMT26-12780", "locator": "$[9].permit_number", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "property_address", "value": "3740 S SIGNAL BUTTE RD", "locator": "$[9].property_address", "raw_text": null, "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "permit_type", "value": "COM", "locator": "$[9].permit_type", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "permit_id": "6ebeae0c-392e-44bf-9e48-9f4c68bbc31d", "address_match": { "apn": "30433005S", "method": "address_normalized_exact", "confidence": 0.92, "normalized": "3740 S SIGNAL BUTTE RD" }, "is_standing_condition": false }, "source": { "document_id": "6cb33a37-a587-4e9f-95af-a4847ee970d1", "document_version_id": "ae2d41ce-1f4e-4048-8ccc-2dc64b639b98", "source_slug": "mesa-building-permits", "source_name": "City of Mesa Building Permits", "agency": "City of Mesa", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "55cca827c96128ee340c6e8ac9570c08511f3a17edfa1c5f11187e55ee6c65f5", "parser_version": "0.1.0", "attribution_text": null } }, { "id": "a830fb6e-9978-4883-a196-4d23fec26f54", "evidence_kind": "grading_or_construction_permit", "summary": "City of Mesa commercial building permit PMT26-13495 at 3740 S SIGNAL BUTTE RD, opened 2026-07-23, status: In Review - Plans are being reviewed or awaiting revisions. Matched to parcels by normalized address; no coordinates in source.", "snippet": "PMT26-13495; COM; 3740 S SIGNAL BUTTE RD; In Review - Plans are being reviewed or awaiting revisions", "snippet_locator": "$[2]", "observed_at": "2026-07-23", "assertion_class": "reported", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.75, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "permit_number", "value": "PMT26-13495", "locator": "$[2].permit_number", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "property_address", "value": "3740 S SIGNAL BUTTE RD", "locator": "$[2].property_address", "raw_text": null, "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "permit_type", "value": "COM", "locator": "$[2].permit_type", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "permit_id": "c42073e1-ff68-4dd1-87e2-9c9012e09fcf", "address_match": { "apn": "30433005S", "method": "address_normalized_exact", "confidence": 0.92, "normalized": "3740 S SIGNAL BUTTE RD" }, "is_standing_condition": false }, "source": { "document_id": "6cb33a37-a587-4e9f-95af-a4847ee970d1", "document_version_id": "ae2d41ce-1f4e-4048-8ccc-2dc64b639b98", "source_slug": "mesa-building-permits", "source_name": "City of Mesa Building Permits", "agency": "City of Mesa", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "55cca827c96128ee340c6e8ac9570c08511f3a17edfa1c5f11187e55ee6c65f5", "parser_version": "0.1.0", "attribution_text": null } }, { "id": "43841245-59c7-4e9d-8a8c-89fa5e29f059", "evidence_kind": "dedicated_substation_proximity", "summary": "Luna Substation tagged 69 kV lies 0 m from the site boundary, close enough for a dedicated connection to be practical. Proximity is a locational precondition, not evidence that this substation serves the site.", "snippet": "name = Luna Substation; operator = Salt River Project; max_voltage_kv = 69.0", "snippet_locator": "https://www.openstreetmap.org/way/376109324", "observed_at": "2026-07-25", "assertion_class": "calculated", "extraction_method": "geometry_operation", "polarity": "supporting", "confidence": 0.95, "human_review_status": "not_reviewed", "is_standing_condition": true, "normalized_values": { "match_method": "substation_proximity", "operator_name": "Salt River Project", "max_voltage_kv": 69.0, "distance_meters": 0.0, "is_standing_condition": true }, "source": { "document_id": "b8abfb58-b6bf-43d9-a88d-3b29d8a9db78", "document_version_id": "ad75ee7e-5363-44ab-a65c-26f4f7b68b2f", "source_slug": "osm-power-infrastructure", "source_name": "OpenStreetMap Power Infrastructure (Overpass API)", "agency": "OpenStreetMap contributors", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "b780b9bfc5c677683c8cde030c3a6581404f52cfeebcce02ca795d5d2d86e7b4", "parser_version": "0.1.0", "attribution_text": "Power infrastructure data (c) OpenStreetMap contributors, ODbL." } }, { "id": "7f532edc-adf4-4ca8-abc9-4a9688d7f0d7", "evidence_kind": "assessor_data_center_classification", "summary": "Maricopa County Assessor currently classifies this parcel's property use as DATA CENTERS (use code 1507).", "snippet": "PropertyUseDescription = DATA CENTERS", "snippet_locator": "$.features[6].attributes.PropertyUseDescription", "observed_at": "2026-07-28", "assertion_class": "reported", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.95, "human_review_status": "not_reviewed", "is_standing_condition": true, "normalized_values": { "fields": [ { "name": "land_use_description", "value": "DATA CENTERS", "locator": "$.features[6].attributes.PropertyUseDescription", "raw_text": "DATA CENTERS", "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "is_standing_condition": true }, "source": { "document_id": "2f6efd07-7c10-4f43-94f2-5b714de87e97", "document_version_id": "4f91c5f4-4b77-4df5-b8c8-7edca03375aa", "source_slug": "maricopa-assessor-parcels", "source_name": "Maricopa County Assessor Parcel Layer", "agency": "Maricopa County Assessor / Maricopa County GIS", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "77af6d6d43febde9b56073b5a2200e2713b9331b31345f146047d2723a8a5008", "parser_version": "0.1.0", "attribution_text": "Parcel data courtesy of Maricopa County Assessor / Maricopa County GIS." } }, { "id": "1793d749-7638-444b-8a98-7897f97b27a8", "evidence_kind": "backup_generator_air_permit", "summary": "EPA ECHO lists PLATYPUS DEVELOPMENT as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: NSPS, NSPSM, OTH.", "snippet": "PLATYPUS DEVELOPMENT; NSPS, NSPSM, OTH", "snippet_locator": "$.Results.Facilities[348]", "observed_at": "2026-07-28", "assertion_class": "extracted", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.8, "human_review_status": "not_reviewed", "is_standing_condition": true, "normalized_values": { "fields": [ { "name": "registry_id", "value": "110062853416", "locator": "$.Results.Facilities[348].RegistryID", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "facility_name", "value": "PLATYPUS DEVELOPMENT", "locator": "$.Results.Facilities[348].FacName", "raw_text": null, "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "naics", "value": "518210", "locator": "$.Results.Facilities[348].FacNAICSCodes", "raw_text": null, "raw_unit": null, "confidence": 0.9, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "permit_id": "c36176d6-0e19-42d0-a920-813feb8cd28d", "is_standing_condition": true }, "source": { "document_id": "5ea0498b-45e6-444b-9ce6-0152b1d46ce2", "document_version_id": "2fd898a1-cdcc-4d1a-8794-bafb16b643f0", "source_slug": "epa-echo-air-facilities", "source_name": "EPA ECHO Air Facility Records", "agency": "United States Environmental Protection Agency", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "71c269ae37b235a090ccad898ff3eb8edbe09b6354bda668713ff99269f166d3", "parser_version": "0.1.0", "attribution_text": null } }, { "id": "98966d6a-bbdd-4dfd-b237-af5c2359c86b", "evidence_kind": "backup_generator_air_permit", "summary": "EPA ECHO lists PLATYPUS CAMPUS EMERGENCY GENERATORS as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: Title V; NESHAP Reciprocating Internal Combustion Engines.", "snippet": "PLATYPUS CAMPUS EMERGENCY GENERATORS; Title V; NESHAP Reciprocating Internal Combustion Engines", "snippet_locator": "$.Results.Facilities[0]", "observed_at": "2026-07-28", "assertion_class": "extracted", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.8, "human_review_status": "not_reviewed", "is_standing_condition": true, "normalized_values": { "fields": [ { "name": "registry_id", "value": "110070123456", "locator": "$.Results.Facilities[0].RegistryID", "raw_text": null, "raw_unit": null, "confidence": 1.0, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "facility_name", "value": "PLATYPUS CAMPUS EMERGENCY GENERATORS", "locator": "$.Results.Facilities[0].FacName", "raw_text": null, "raw_unit": null, "confidence": 0.95, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" }, { "name": "naics", "value": "518210", "locator": "$.Results.Facilities[0].FacNAICSCodes", "raw_text": null, "raw_unit": null, "confidence": 0.9, "assertion_class": "reported", "normalized_unit": null, "extraction_method": "structured_feed" } ], "permit_id": "b891e5d2-7941-4972-8a29-c57c0ad6531e", "is_standing_condition": true }, "source": { "document_id": "f8185edf-ff0f-4828-b4c0-db7471b871c4", "document_version_id": "dbe2f7b4-7daf-4474-874a-a8497798e7c8", "source_slug": "epa-echo-air-facilities", "source_name": "EPA ECHO Air Facility Records", "agency": "United States Environmental Protection Agency", "source_url": "https://example.invalid/recorded", "retrieved_at": "2026-07-25T21:30:00Z", "content_sha256": "ed532dd1321900cdc6a4f6faad76e019dbb43cee816c3ff880f814aed3b99114", "parser_version": "0.1.0", "attribution_text": null } } ], "stage_history": [ { "id": "0b046fa9-937e-44c4-9271-04f3ee32edba", "from_stage": 0, "from_stage_label": null, "to_stage": 7, "to_stage_label": "Operational", "effective_date": "2013-11-04", "detected_at": "2026-07-28T17:30:32.249600Z", "is_downgrade": false, "confidence": 73.23, "rationale": "Stage advanced from 0 (No known development) to 7 (Operational) at 73% confidence. Principal evidence: Assessor classifies property use as data centre; Grading or construction permit; Backup-generator air permit.", "triggering_evidence_ids": [ "7f532edc-adf4-4ca8-abc9-4a9688d7f0d7", "a830fb6e-9978-4883-a196-4d23fec26f54", "1793d749-7638-444b-8a98-7897f97b27a8", "8129e41c-b257-4648-8878-9c9eb8ad8351", "98966d6a-bbdd-4dfd-b237-af5c2359c86b", "51cc44dd-e284-4f9e-86e0-1acee10e122e", "2f91c51c-8a36-45a0-8ff8-4b1e791f594d", "f04d5836-ce85-42ae-b10a-30cc46f0642c", "a8d607ba-d6b1-47db-aa01-54fc55ac7c8e", "bddbcef9-4aad-4721-9ec1-56d6570c4a0f" ], "detection_lag_days": 4649 } ], "predictions": [ { "id": "4ae118a1-3a7a-437a-9b5e-9e978ee40857", "calculated_at": "2026-07-28T17:30:32.246861Z", "as_of_date": "2026-07-28", "predicted_stage": 7, "predicted_stage_label": "Operational", "raw_score": 61.3973, "confidence": 64.06, "confidence_band": "high", "positive_contribution": 61.3973, "negative_contribution": 0.0, "evidence_considered": 11, "distinct_evidence_kinds": 7, "is_backtest": false, "summary": "64% confidence from 11 evidence records across 7 distinct kinds; stage 7 (Operational).", "model_name": "helios-rule-based", "model_version": "0.1.0", "explanations": [ { "rule_id": "assessor-data-center-classification", "evidence_kind": "assessor_data_center_classification", "label": "Assessor classifies property use as data centre", "detail": "Maricopa County Assessor currently classifies this parcel's property use as DATA CENTERS (use code 1507).", "base_weight": 20.0, "applied_weight": 19.0, "confidence_multiplier": 0.95, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "7f532edc-adf4-4ca8-abc9-4a9688d7f0d7" }, { "rule_id": "backup-generator-air-permit", "evidence_kind": "backup_generator_air_permit", "label": "Backup-generator air permit", "detail": "EPA ECHO lists PLATYPUS DEVELOPMENT as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: NSPS, NSPSM, OTH.", "base_weight": 17.0, "applied_weight": 13.6, "confidence_multiplier": 0.8, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "1793d749-7638-444b-8a98-7897f97b27a8" }, { "rule_id": "dedicated-substation-proximity", "evidence_kind": "dedicated_substation_proximity", "label": "High-voltage substation in close proximity", "detail": "Luna Substation tagged 69 kV lies 0 m from the site boundary, close enough for a dedicated connection to be practical. Proximity is a locational precondition, not evidence that this substation serves the site.", "base_weight": 8.0, "applied_weight": 7.6, "confidence_multiplier": 0.95, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "43841245-59c7-4e9d-8a8c-89fa5e29f059" }, { "rule_id": "backup-generator-air-permit", "evidence_kind": "backup_generator_air_permit", "label": "Backup-generator air permit", "detail": "EPA ECHO lists PLATYPUS CAMPUS EMERGENCY GENERATORS as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: Title V; NESHAP Reciprocating Internal Combustion Engines. (occurrence 2, weight reduced)", "base_weight": 17.0, "applied_weight": 6.8, "confidence_multiplier": 0.8, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "98966d6a-bbdd-4dfd-b237-af5c2359c86b" }, { "rule_id": "transmission-or-substation-filing", "evidence_kind": "substation_application", "label": "Dedicated substation application", "detail": "ACC docket E-01345A-22-0148: Amended single-line and site plan. Filed by Arizona Public Service Company on 2023-01-09. Helios ingested a recorded fixture, not a live scrape.", "base_weight": 25.0, "applied_weight": 6.2071, "confidence_multiplier": 0.85, "recency_multiplier": 0.2921, "polarity": "supporting", "evidence_record_id": "51cc44dd-e284-4f9e-86e0-1acee10e122e" }, { "rule_id": "transmission-or-substation-filing", "evidence_kind": "substation_application", "label": "Dedicated substation application", "detail": "ACC docket E-01345A-22-0148: Initial CEC application \u2014 Signal Butte Substation. Filed by Arizona Public Service Company on 2022-06-14. Helios ingested a recorded fixture, not a live scrape. (occurrence 2, weight reduced)", "base_weight": 25.0, "applied_weight": 2.6562, "confidence_multiplier": 0.85, "recency_multiplier": 0.25, "polarity": "supporting", "evidence_record_id": "a8d607ba-d6b1-47db-aa01-54fc55ac7c8e" }, { "rule_id": "large-industrial-parcel-acquisition", "evidence_kind": "large_industrial_parcel_acquisition", "label": "Large industrial parcel acquisition", "detail": "Organization-held industrial parcel of 83.2 acres transferred for $113,576,875 on 2013-11-04, at or above the 20-acre campus-scale threshold.", "base_weight": 10.0, "applied_weight": 2.25, "confidence_multiplier": 0.9, "recency_multiplier": 0.25, "polarity": "supporting", "evidence_record_id": "2f91c51c-8a36-45a0-8ff8-4b1e791f594d" }, { "rule_id": "grading-or-construction-permit", "evidence_kind": "grading_or_construction_permit", "label": "Grading or construction permit", "detail": "City of Mesa commercial building permit PMT26-13495 at 3740 S SIGNAL BUTTE RD, opened 2026-07-23, status: In Review - Plans are being reviewed or awaiting revisions. Matched to parcels by normalized address; no coordinates in source.", "base_weight": 2.0, "applied_weight": 1.4929, "confidence_multiplier": 0.75, "recency_multiplier": 0.9953, "polarity": "supporting", "evidence_record_id": "a830fb6e-9978-4883-a196-4d23fec26f54" }, { "rule_id": "grading-or-construction-permit", "evidence_kind": "grading_or_construction_permit", "label": "Grading or construction permit", "detail": "City of Mesa commercial building permit PMT26-12780 at 3740 S SIGNAL BUTTE RD, opened 2026-07-13, status: In Review - Plans are being reviewed or awaiting revisions. Matched to parcels by normalized address; no coordinates in source. (occurrence 2, weight reduced)", "base_weight": 2.0, "applied_weight": 0.7457, "confidence_multiplier": 0.75, "recency_multiplier": 0.9943, "polarity": "supporting", "evidence_record_id": "8129e41c-b257-4648-8878-9c9eb8ad8351" }, { "rule_id": "shell-entity-ownership", "evidence_kind": "shell_entity_ownership", "label": "Single-purpose entity holds title", "detail": "Title is held by PLATYPUS DEVELOPMENT LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC); minimal descriptive name). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent.", "base_weight": 6.0, "applied_weight": 0.675, "confidence_multiplier": 0.45, "recency_multiplier": 0.25, "polarity": "supporting", "evidence_record_id": "bddbcef9-4aad-4721-9ec1-56d6570c4a0f" }, { "rule_id": "grading-or-construction-permit", "evidence_kind": "grading_or_construction_permit", "label": "Grading or construction permit", "detail": "City of Mesa commercial building permit PMT26-07994 at 3740 S SIGNAL BUTTE RD, opened 2026-04-27, status: Issued - Permit approved and issued and in inspection phase. Matched to parcels by normalized address; no coordinates in source. (occurrence 3, weight reduced)", "base_weight": 2.0, "applied_weight": 0.3704, "confidence_multiplier": 0.75, "recency_multiplier": 0.9877, "polarity": "supporting", "evidence_record_id": "f04d5836-ce85-42ae-b10a-30cc46f0642c" } ] }, { "id": "9d229f35-ffe5-44ad-b729-105ad946a84e", "calculated_at": "2026-07-28T17:30:32.246916Z", "as_of_date": "2026-07-28", "predicted_stage": 7, "predicted_stage_label": "Operational", "raw_score": 79.079, "confidence": 73.23, "confidence_band": "high", "positive_contribution": 79.079, "negative_contribution": 0.0, "evidence_considered": 11, "distinct_evidence_kinds": 6, "is_backtest": false, "summary": "73% confidence from 11 evidence records across 6 distinct kinds; stage 7 (Operational).", "model_name": "helios-rule-based", "model_version": "0.1.0", "explanations": [ { "rule_id": "assessor-data-center-classification", "evidence_kind": "assessor_data_center_classification", "label": "Assessor classifies property use as data centre", "detail": "Maricopa County Assessor currently classifies this parcel's property use as DATA CENTERS (use code 1507).", "base_weight": 20.0, "applied_weight": 19.0, "confidence_multiplier": 0.95, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "7f532edc-adf4-4ca8-abc9-4a9688d7f0d7" }, { "rule_id": "grading-or-construction-permit", "evidence_kind": "grading_or_construction_permit", "label": "Grading or construction permit", "detail": "City of Mesa commercial building permit PMT26-13495 at 3740 S SIGNAL BUTTE RD, opened 2026-07-23, status: In Review - Plans are being reviewed or awaiting revisions. Matched to parcels by normalized address; no coordinates in source.", "base_weight": 20.0, "applied_weight": 14.9295, "confidence_multiplier": 0.75, "recency_multiplier": 0.9953, "polarity": "supporting", "evidence_record_id": "a830fb6e-9978-4883-a196-4d23fec26f54" }, { "rule_id": "backup-generator-air-permit", "evidence_kind": "backup_generator_air_permit", "label": "Backup-generator air permit", "detail": "EPA ECHO lists PLATYPUS DEVELOPMENT as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: NSPS, NSPSM, OTH.", "base_weight": 17.0, "applied_weight": 13.6, "confidence_multiplier": 0.8, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "1793d749-7638-444b-8a98-7897f97b27a8" }, { "rule_id": "grading-or-construction-permit", "evidence_kind": "grading_or_construction_permit", "label": "Grading or construction permit", "detail": "City of Mesa commercial building permit PMT26-12780 at 3740 S SIGNAL BUTTE RD, opened 2026-07-13, status: In Review - Plans are being reviewed or awaiting revisions. Matched to parcels by normalized address; no coordinates in source. (occurrence 2, weight reduced)", "base_weight": 20.0, "applied_weight": 7.4573, "confidence_multiplier": 0.75, "recency_multiplier": 0.9943, "polarity": "supporting", "evidence_record_id": "8129e41c-b257-4648-8878-9c9eb8ad8351" }, { "rule_id": "backup-generator-air-permit", "evidence_kind": "backup_generator_air_permit", "label": "Backup-generator air permit", "detail": "EPA ECHO lists PLATYPUS CAMPUS EMERGENCY GENERATORS as a Clean Air Act facility (NAICS 518210). Program text and/or hosting NAICS are consistent with backup generation at a data-processing site. Coordinates may be geocoded. Programs: Title V; NESHAP Reciprocating Internal Combustion Engines. (occurrence 2, weight reduced)", "base_weight": 17.0, "applied_weight": 6.8, "confidence_multiplier": 0.8, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "98966d6a-bbdd-4dfd-b237-af5c2359c86b" }, { "rule_id": "transmission-or-substation-filing", "evidence_kind": "substation_application", "label": "Dedicated substation application", "detail": "ACC docket E-01345A-22-0148: Amended single-line and site plan. Filed by Arizona Public Service Company on 2023-01-09. Helios ingested a recorded fixture, not a live scrape.", "base_weight": 25.0, "applied_weight": 6.2071, "confidence_multiplier": 0.85, "recency_multiplier": 0.2921, "polarity": "supporting", "evidence_record_id": "51cc44dd-e284-4f9e-86e0-1acee10e122e" }, { "rule_id": "large-industrial-parcel-acquisition", "evidence_kind": "large_industrial_parcel_acquisition", "label": "Large industrial parcel acquisition", "detail": "Organization-held industrial parcel of 83.2 acres transferred for $113,576,875 on 2013-11-04, at or above the 20-acre campus-scale threshold.", "base_weight": 18.0, "applied_weight": 4.05, "confidence_multiplier": 0.9, "recency_multiplier": 0.25, "polarity": "supporting", "evidence_record_id": "2f91c51c-8a36-45a0-8ff8-4b1e791f594d" }, { "rule_id": "grading-or-construction-permit", "evidence_kind": "grading_or_construction_permit", "label": "Grading or construction permit", "detail": "City of Mesa commercial building permit PMT26-07994 at 3740 S SIGNAL BUTTE RD, opened 2026-04-27, status: Issued - Permit approved and issued and in inspection phase. Matched to parcels by normalized address; no coordinates in source. (occurrence 3, weight reduced)", "base_weight": 20.0, "applied_weight": 3.7039, "confidence_multiplier": 0.75, "recency_multiplier": 0.9877, "polarity": "supporting", "evidence_record_id": "f04d5836-ce85-42ae-b10a-30cc46f0642c" }, { "rule_id": "transmission-or-substation-filing", "evidence_kind": "substation_application", "label": "Dedicated substation application", "detail": "ACC docket E-01345A-22-0148: Initial CEC application \u2014 Signal Butte Substation. Filed by Arizona Public Service Company on 2022-06-14. Helios ingested a recorded fixture, not a live scrape. (occurrence 2, weight reduced)", "base_weight": 25.0, "applied_weight": 2.6562, "confidence_multiplier": 0.85, "recency_multiplier": 0.25, "polarity": "supporting", "evidence_record_id": "a8d607ba-d6b1-47db-aa01-54fc55ac7c8e" }, { "rule_id": "shell-entity-ownership", "evidence_kind": "shell_entity_ownership", "label": "Single-purpose entity holds title", "detail": "Title is held by PLATYPUS DEVELOPMENT LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC); minimal descriptive name). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent.", "base_weight": 6.0, "applied_weight": 0.675, "confidence_multiplier": 0.45, "recency_multiplier": 0.25, "polarity": "supporting", "evidence_record_id": "bddbcef9-4aad-4721-9ec1-56d6570c4a0f" }, { "rule_id": "dedicated-substation-proximity", "evidence_kind": "dedicated_substation_proximity", "label": "High-voltage substation in close proximity", "detail": "Luna Substation tagged 69 kV lies 0 m from the site boundary, close enough for a dedicated connection to be practical. Proximity is a locational precondition, not evidence that this substation serves the site.", "base_weight": 0.0, "applied_weight": 0.0, "confidence_multiplier": 0.95, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "43841245-59c7-4e9d-8a8c-89fa5e29f059" } ] } ], "scoring_model": { "name": "helios-rule-based", "version": "0.1.0", "parameters_hash": "46888dc8be8c1d3ffb00092482a839e09fbddfae9688db732ffd6cf982064079", "parameters": { "rules": [ { "rule_id": "transmission-or-substation-filing", "evidence_kind": "substation_application", "identity_weight": 25.0, "stage_weight": 25.0, "implies_stage": 3, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "transmission-filing", "evidence_kind": "transmission_filing", "identity_weight": 25.0, "stage_weight": 25.0, "implies_stage": 3, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "planning-application-data-center", "evidence_kind": "planning_application_data_center", "identity_weight": 20.0, "stage_weight": 20.0, "implies_stage": 2, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "assessor-data-center-classification", "evidence_kind": "assessor_data_center_classification", "identity_weight": 20.0, "stage_weight": 20.0, "implies_stage": 7, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "large-industrial-parcel-acquisition", "evidence_kind": "large_industrial_parcel_acquisition", "identity_weight": 10.0, "stage_weight": 18.0, "implies_stage": 1, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "backup-generator-air-permit", "evidence_kind": "backup_generator_air_permit", "identity_weight": 17.0, "stage_weight": 17.0, "implies_stage": 3, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "water-or-cooling-permit", "evidence_kind": "water_or_cooling_permit", "identity_weight": 14.0, "stage_weight": 14.0, "implies_stage": 3, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "data-center-compatible-zoning", "evidence_kind": "data_center_compatible_zoning", "identity_weight": 8.0, "stage_weight": 12.0, "implies_stage": 2, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "grading-or-construction-permit", "evidence_kind": "grading_or_construction_permit", "identity_weight": 2.0, "stage_weight": 20.0, "implies_stage": 4, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "dust-control-registration", "evidence_kind": "dust_control_registration", "identity_weight": 2.0, "stage_weight": 15.0, "implies_stage": 4, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "satellite-construction-change", "evidence_kind": "satellite_construction_change", "identity_weight": 0.0, "stage_weight": 15.0, "implies_stage": 4, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "dedicated-substation-proximity", "evidence_kind": "dedicated_substation_proximity", "identity_weight": 8.0, "stage_weight": 0.0, "implies_stage": null, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "known-developer-relationship", "evidence_kind": "known_developer_relationship", "identity_weight": 15.0, "stage_weight": 5.0, "implies_stage": null, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "shell-entity-ownership", "evidence_kind": "shell_entity_ownership", "identity_weight": 6.0, "stage_weight": 6.0, "implies_stage": 1, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "hiring-or-procurement-signal", "evidence_kind": "hiring_or_procurement_signal", "identity_weight": 15.0, "stage_weight": 20.0, "implies_stage": 7, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "conflicting-facility-classification", "evidence_kind": "conflicting_facility_classification", "identity_weight": -20.0, "stage_weight": 0.0, "implies_stage": null, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "project-cancellation", "evidence_kind": "project_cancellation", "identity_weight": 0.0, "stage_weight": -20.0, "implies_stage": null, "max_occurrences": 3, "occurrence_decay": 0.5 }, { "rule_id": "stale-evidence-no-progression", "evidence_kind": "stale_evidence_no_progression", "identity_weight": 0.0, "stage_weight": -20.0, "implies_stage": null, "max_occurrences": 3, "occurrence_decay": 0.5 } ], "staleness_threshold_days": 900, "recency_half_life_days": 730, "diversity_caps": { "1": 45.0, "2": 70.0, "3": 88.0 }, "saturation_scale": 60.0 } }, "attributions": [ "Parcel data courtesy of Maricopa County Assessor / Maricopa County GIS.", "Power infrastructure data (c) OpenStreetMap contributors, ODbL." ] }