{"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":"2026-10-17T05:35:58.500035+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":"3603348","name":"H & D Strip"},"operator":{"type":"operator","id":"P08323","name":"H & D Coal Company"},"controller":{"type":"controller","id":"C06192","name":"AOI Coal Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02397","name":"Theodore De Marsh Coal Company"},"object":{"type":"mine","id":"3603348","name":"H & D Strip"},"validFrom":"1950-01-01","validTo":"1974-10-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|P02397|1950-01-01|1974-10-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02058","name":"De Marsh Theodore"},"object":{"type":"mine","id":"3603348","name":"H & D Strip"},"validFrom":"1950-01-01","validTo":"1974-10-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|C02058|1950-01-01|1974-10-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02058","name":"De Marsh Theodore"},"object":{"type":"operator","id":"P02397","name":"Theodore De Marsh Coal Company"},"validFrom":"1950-01-01","validTo":"1974-10-10","current":false,"derived":true,"evidenceMineId":"3603348","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|P02397|1950-01-01|C02058|1950-01-01|57348"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02396","name":"H & D Coal Company"},"object":{"type":"mine","id":"3603348","name":"H & D Strip"},"validFrom":"1974-10-11","validTo":"1978-06-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|P02396|1974-10-11|1978-06-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02057","name":"De Marsh Paul C"},"object":{"type":"mine","id":"3603348","name":"H & D Strip"},"validFrom":"1974-10-11","validTo":"1978-06-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|C02057|1974-10-11|1978-06-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02057","name":"De Marsh Paul C"},"object":{"type":"operator","id":"P02396","name":"H & D Coal Company"},"validFrom":"1974-10-11","validTo":"1978-06-13","current":false,"derived":true,"evidenceMineId":"3603348","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|P02396|1974-10-11|C02057|1974-10-11|57347"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P08323","name":"H & D Coal Company"},"object":{"type":"mine","id":"3603348","name":"H & D Strip"},"validFrom":"1978-06-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|P08323|1978-06-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06192","name":"AOI Coal Company"},"object":{"type":"mine","id":"3603348","name":"H & D Strip"},"validFrom":"1978-06-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|C06192|1978-06-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06192","name":"AOI Coal Company"},"object":{"type":"operator","id":"P08323","name":"H & D Coal Company"},"validFrom":"1978-06-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"3603348","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3603348|P08323|1978-06-14|C06192|1978-06-14|71156"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3603348","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}