{"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":"4407281","name":"Kennedy #3 Surface"},"operator":{"type":"operator","id":"0146035","name":"Ramaco Resources Land Holdings, LLC"},"controller":{"type":"controller","id":"0137341","name":"Ramaco Resources Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"mine","id":"4407281","name":"Kennedy #3 Surface"},"validFrom":"1997-08-26","validTo":"2011-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|C02508|1997-08-26|2011-05-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23902","name":"Knox Creek Coal Corp"},"object":{"type":"mine","id":"4407281","name":"Kennedy #3 Surface"},"validFrom":"2011-02-23","validTo":"2016-07-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|P23902|2011-02-23|2016-07-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"operator","id":"P23902","name":"Knox Creek Coal Corp"},"validFrom":"2011-02-23","validTo":"2011-05-31","current":false,"derived":true,"evidenceMineId":"4407281","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|P23902|2011-02-23|C02508|1997-08-26|59479"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"mine","id":"4407281","name":"Kennedy #3 Surface"},"validFrom":"2011-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|0041211|2011-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"P23902","name":"Knox Creek Coal Corp"},"validFrom":"2011-06-01","validTo":"2016-07-13","current":false,"derived":true,"evidenceMineId":"4407281","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|P23902|2011-02-23|0041211|2011-06-01|2325"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0104377","name":"Michael D Bauersachs"},"object":{"type":"mine","id":"4407281","name":"Kennedy #3 Surface"},"validFrom":"2016-07-01","validTo":"2016-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|0104377|2016-07-01|2016-12-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0146035","name":"Ramaco Resources Land Holdings, LLC"},"object":{"type":"mine","id":"4407281","name":"Kennedy #3 Surface"},"validFrom":"2016-07-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|0146035|2016-07-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0104377","name":"Michael D Bauersachs"},"object":{"type":"operator","id":"0146035","name":"Ramaco Resources Land Holdings, LLC"},"validFrom":"2016-07-14","validTo":"2016-12-31","current":false,"derived":true,"evidenceMineId":"4407281","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|0146035|2016-07-14|0104377|2016-07-01|18212"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0137341","name":"Ramaco Resources Inc"},"object":{"type":"mine","id":"4407281","name":"Kennedy #3 Surface"},"validFrom":"2017-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|0137341|2017-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0137341","name":"Ramaco Resources Inc"},"object":{"type":"operator","id":"0146035","name":"Ramaco Resources Land Holdings, LLC"},"validFrom":"2017-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4407281","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4407281|0146035|2016-07-14|0137341|2017-01-01|27739"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4407281","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"}}