{"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":"1519773","name":"Hickory Ridge"},"operator":{"type":"operator","id":"0173659","name":"Kentucky Land Resources, Inc"},"controller":{"type":"controller","id":"0157801","name":"ACNR Holdings, Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0066691","name":"Armstrong Energy Inc"},"object":{"type":"mine","id":"1519773","name":"Hickory Ridge"},"validFrom":"2007-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0066691|2007-04-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0079344","name":"Armstrong Coal Co. Inc."},"object":{"type":"mine","id":"1519773","name":"Hickory Ridge"},"validFrom":"2014-12-12","validTo":"2018-02-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0079344|2014-12-12|2018-02-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0066691","name":"Armstrong Energy Inc"},"object":{"type":"operator","id":"0079344","name":"Armstrong Coal Co. Inc."},"validFrom":"2014-12-12","validTo":"2018-02-13","current":false,"derived":true,"evidenceMineId":"1519773","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0079344|2014-12-12|0066691|2007-04-01|9255"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0155756","name":"Western Kentucky Resources, LLC"},"object":{"type":"mine","id":"1519773","name":"Hickory Ridge"},"validFrom":"2018-02-14","validTo":"2020-09-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0155756|2018-02-14|2020-09-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0138821","name":"Western Kentucky Consolidated Resources, LLC"},"object":{"type":"mine","id":"1519773","name":"Hickory Ridge"},"validFrom":"2018-02-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0138821|2018-02-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0138821","name":"Western Kentucky Consolidated Resources, LLC"},"object":{"type":"operator","id":"0155756","name":"Western Kentucky Resources, LLC"},"validFrom":"2018-02-14","validTo":"2020-09-16","current":false,"derived":true,"evidenceMineId":"1519773","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0155756|2018-02-14|0138821|2018-02-14|28077"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0173659","name":"Kentucky Land Resources, Inc"},"object":{"type":"mine","id":"1519773","name":"Hickory Ridge"},"validFrom":"2020-09-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0173659|2020-09-17|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0157801","name":"ACNR Holdings, Inc"},"object":{"type":"mine","id":"1519773","name":"Hickory Ridge"},"validFrom":"2020-09-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0157801|2020-09-17|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0157801","name":"ACNR Holdings, Inc"},"object":{"type":"operator","id":"0173659","name":"Kentucky Land Resources, Inc"},"validFrom":"2020-09-17","validTo":null,"current":true,"derived":true,"evidenceMineId":"1519773","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1519773|0173659|2020-09-17|0157801|2020-09-17|32638"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1519773","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"}}