{ "generated_at": "2026-07-29T19:58:38.473536+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-TEMPE-001", "jurisdiction": "Tempe", "county": "Maricopa", "site_kind": "enterprise_data_center", "site_kind_assertion": "reported", "current_stage": 7, "current_stage_label": "Operational", "current_confidence": 34.39, "total_acres": 4.2, "first_signal_date": "2021-08-02", "latest_signal_date": "2026-07-28", "operator_status": "not_established", "summary": "1 parcel(s) totalling 4.2 acres near 2601 W BROADWAY RD, Tempe. Title of record is held by TIERRA DC ASSETS LLC. Helios has not established which organization, if any, operates or will operate a facility here.", "boundary": { "type": "MultiPolygon", "coordinates": [ [ [ [ -111.97604759572974, 33.40569473253029 ], [ -111.97714215786917, 33.405688844256865 ], [ -111.97713308308813, 33.40717021538582 ], [ -111.97637700255454, 33.40717428356448 ], [ -111.97637756130665, 33.407247140300555 ], [ -111.97603808885907, 33.40724611669518 ], [ -111.97603434198604, 33.40724610469683 ], [ -111.97604360361663, 33.40569475427759 ], [ -111.97604759572974, 33.40569473253029 ] ] ] ] } }, "evidence": [ { "id": "da8b9ef2-f17d-4eca-8838-52d41cc1d1d3", "evidence_kind": "shell_entity_ownership", "summary": "Title is held by TIERRA DC ASSETS LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC)). This is a weak signal only: project-specific entities are routine in ordinary commercial real estate and imply no particular parent.", "snippet": "OwnerName = TIERRA DC ASSETS LLC", "snippet_locator": "$.features[0].attributes.OwnerName", "observed_at": "2021-08-02", "assertion_class": "inferred", "extraction_method": "pattern_rule", "polarity": "supporting", "confidence": 0.45, "human_review_status": "not_reviewed", "is_standing_condition": false, "normalized_values": { "fields": [ { "name": "owner_name", "value": "TIERRA DC ASSETS LLC", "locator": "$.features[0].attributes.OwnerName", "raw_text": "TIERRA DC ASSETS 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": "275786e2-ca83-4a12-a936-af8684ff7357", "evidence_kind": "dedicated_substation_proximity", "summary": "Binary Substation tagged 69 kV lies 828 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 = Binary Substation; operator = Salt River Project; max_voltage_kv = 69.0", "snippet_locator": "https://www.openstreetmap.org/way/220124243", "observed_at": "2026-07-25", "assertion_class": "calculated", "extraction_method": "geometry_operation", "polarity": "supporting", "confidence": 0.7017, "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": 827.63, "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": "c4a5a0e4-ccb9-4f8d-8113-1db2446c1d72", "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": "$.features[0].attributes.PropertyUseDescription", "observed_at": "2026-07-28", "assertion_class": "reported", "extraction_method": "structured_feed", "polarity": "supporting", "confidence": 0.95, "human_review_status": "not_reviewed", "is_standing_condition": true, "normalized_values": { "fields": [ { "name": "land_use_description", "value": "DATA CENTERS", "locator": "$.features[0].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." } } ], "stage_history": [ { "id": "720d1f05-fc46-4b8a-8f7b-fd5da8bef0b1", "from_stage": 0, "from_stage_label": null, "to_stage": 7, "to_stage_label": "Operational", "effective_date": "2021-08-02", "detected_at": "2026-07-28T17:30:32.098740Z", "is_downgrade": false, "confidence": 27.96, "rationale": "Stage advanced from 0 (No known development) to 7 (Operational) at 28% confidence. Principal evidence: Assessor classifies property use as data centre; Single-purpose entity holds title.", "triggering_evidence_ids": [ "c4a5a0e4-ccb9-4f8d-8113-1db2446c1d72", "da8b9ef2-f17d-4eca-8838-52d41cc1d1d3" ], "detection_lag_days": 1821 } ], "predictions": [ { "id": "9843d339-e106-4a87-b29e-d05a1b86084f", "calculated_at": "2026-07-28T17:30:32.093087Z", "as_of_date": "2026-07-28", "predicted_stage": 7, "predicted_stage_label": "Operational", "raw_score": 25.2886, "confidence": 34.39, "confidence_band": "low", "positive_contribution": 25.2886, "negative_contribution": 0.0, "evidence_considered": 3, "distinct_evidence_kinds": 3, "is_backtest": false, "summary": "34% confidence from 3 evidence records across 3 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": "c4a5a0e4-ccb9-4f8d-8113-1db2446c1d72" }, { "rule_id": "dedicated-substation-proximity", "evidence_kind": "dedicated_substation_proximity", "label": "High-voltage substation in close proximity", "detail": "Binary Substation tagged 69 kV lies 828 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": 5.6136, "confidence_multiplier": 0.7017, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "275786e2-ca83-4a12-a936-af8684ff7357" }, { "rule_id": "shell-entity-ownership", "evidence_kind": "shell_entity_ownership", "label": "Single-purpose entity holds title", "detail": "Title is held by TIERRA DC ASSETS LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC)). 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": "da8b9ef2-f17d-4eca-8838-52d41cc1d1d3" } ] }, { "id": "5f1c0b4a-2812-48d0-8931-5f7402998730", "calculated_at": "2026-07-28T17:30:32.093219Z", "as_of_date": "2026-07-28", "predicted_stage": 7, "predicted_stage_label": "Operational", "raw_score": 19.675, "confidence": 27.96, "confidence_band": "low", "positive_contribution": 19.675, "negative_contribution": 0.0, "evidence_considered": 3, "distinct_evidence_kinds": 2, "is_backtest": false, "summary": "28% confidence from 3 evidence records across 2 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": "c4a5a0e4-ccb9-4f8d-8113-1db2446c1d72" }, { "rule_id": "shell-entity-ownership", "evidence_kind": "shell_entity_ownership", "label": "Single-purpose entity holds title", "detail": "Title is held by TIERRA DC ASSETS LLC, whose name shows single-purpose-entity characteristics (pass-through legal form (LLC)). 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": "da8b9ef2-f17d-4eca-8838-52d41cc1d1d3" }, { "rule_id": "dedicated-substation-proximity", "evidence_kind": "dedicated_substation_proximity", "label": "High-voltage substation in close proximity", "detail": "Binary Substation tagged 69 kV lies 828 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": 0.7017, "recency_multiplier": 1.0, "polarity": "supporting", "evidence_record_id": "275786e2-ca83-4a12-a936-af8684ff7357" } ] } ], "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." ] }