{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"1700967","name":"Chip Mill Pit"},"operator":{"type":"operator","id":"0141815","name":"W. T. Gardner & Sons, Inc."},"controller":{"type":"controller","id":"0193941","name":"Tyler  Gardner; Shey  Gardner; Thomas W Gardner"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0141815","name":"W. T. Gardner & Sons, Inc."},"object":{"type":"mine","id":"1700967","name":"Chip Mill Pit"},"validFrom":"2015-10-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0141815|2015-10-07|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0121243","name":"Scott A  Gardner et al"},"object":{"type":"mine","id":"1700967","name":"Chip Mill Pit"},"validFrom":"2015-10-07","validTo":"2025-06-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0121243|2015-10-07|2025-06-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0121243","name":"Scott A  Gardner et al"},"object":{"type":"operator","id":"0141815","name":"W. T. Gardner & Sons, Inc."},"validFrom":"2015-10-07","validTo":"2025-06-24","current":false,"derived":true,"evidenceMineId":"1700967","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0141815|2015-10-07|0121243|2015-10-07|23653"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0121243","name":"Thomas W  Gardner et al"},"object":{"type":"operator","id":"0141815","name":"W. T. Gardner & Sons, Inc."},"validFrom":"2015-10-07","validTo":"2025-06-24","current":false,"derived":true,"evidenceMineId":"1700967","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0141815|2015-10-07|0121243|2015-10-07|23654"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0193941","name":"Shey  Gardner et al"},"object":{"type":"mine","id":"1700967","name":"Chip Mill Pit"},"validFrom":"2025-06-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0193941|2025-06-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0193941","name":"Shey  Gardner et al"},"object":{"type":"operator","id":"0141815","name":"W. T. Gardner & Sons, Inc."},"validFrom":"2025-06-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"1700967","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0141815|2015-10-07|0193941|2025-06-25|41466"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0193941","name":"Thomas W Gardner et al"},"object":{"type":"operator","id":"0141815","name":"W. T. Gardner & Sons, Inc."},"validFrom":"2025-06-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"1700967","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0141815|2015-10-07|0193941|2025-06-25|41467"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0193941","name":"Tyler  Gardner et al"},"object":{"type":"operator","id":"0141815","name":"W. T. Gardner & Sons, Inc."},"validFrom":"2025-06-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"1700967","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1700967|0141815|2015-10-07|0193941|2025-06-25|41468"}}],"coverage":{"historyRecords":5,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1700967","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}