{"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":"4608007","name":"Alloy No 1"},"operator":{"type":"operator","id":"P23835","name":"Mammoth Coal Co."},"controller":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13045","name":"Eddie  Hurley"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1991-02-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|C13045|1991-02-25|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21351","name":"M A G Inc"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1991-03-01","validTo":"1996-01-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P21351|1991-03-01|1996-01-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13672","name":"Stanley Michael R"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1991-03-01","validTo":"1996-01-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|C13672|1991-03-01|1996-01-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13672","name":"Stanley Michael R"},"object":{"type":"operator","id":"P21351","name":"M A G Inc"},"validFrom":"1991-03-01","validTo":"1996-01-22","current":false,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P21351|1991-03-01|C13672|1991-03-01|90780"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P21386","name":"Continuous Mining Company Inc"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1996-01-23","validTo":"1996-02-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P21386|1996-01-23|1996-02-29"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13045","name":"Eddie  Hurley"},"object":{"type":"operator","id":"P21386","name":"Continuous Mining Company Inc"},"validFrom":"1996-01-23","validTo":"1996-02-29","current":false,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P21386|1996-01-23|C13045|1991-02-25|88520"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1996-02-05","validTo":"2011-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|C02508|1996-02-05|2011-05-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23391","name":"Howtay Mining Company Inc"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1996-03-01","validTo":"1996-09-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23391|1996-03-01|1996-09-02"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C14885","name":"Charles T  Norman"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1996-03-01","validTo":"1996-09-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|C14885|1996-03-01|1996-09-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C14885","name":"Charles T  Norman"},"object":{"type":"operator","id":"P23391","name":"Howtay Mining Company Inc"},"validFrom":"1996-03-01","validTo":"1996-09-02","current":false,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23391|1996-03-01|C14885|1996-03-01|94217"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23502","name":"Wilderness Mining Company Inc"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1996-09-03","validTo":"2009-10-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23502|1996-09-03|2009-10-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00230","name":"Pittston Company"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"1996-09-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|C00230|1996-09-03|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00230","name":"Pittston Company"},"object":{"type":"operator","id":"P23502","name":"Wilderness Mining Company Inc"},"validFrom":"1996-09-03","validTo":"2009-10-15","current":false,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23502|1996-09-03|C00230|1996-09-03|45397"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23835","name":"Mammoth Coal Co."},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"2009-10-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23835|2009-10-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02508","name":"Massey Energy Company"},"object":{"type":"operator","id":"P23835","name":"Mammoth Coal Co."},"validFrom":"2009-10-16","validTo":"2011-05-31","current":false,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23835|2009-10-16|C02508|1996-02-05|59436"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"2011-06-01","validTo":"2016-07-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|0041211|2011-06-01|2016-07-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"P23835","name":"Mammoth Coal Co."},"validFrom":"2011-06-01","validTo":"2016-07-25","current":false,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23835|2009-10-16|0041211|2011-06-01|2054"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"2016-07-26","validTo":"2018-11-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|0127923|2016-07-26|2018-11-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"operator","id":"P23835","name":"Mammoth Coal Co."},"validFrom":"2016-07-26","validTo":"2018-11-08","current":false,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23835|2009-10-16|0127923|2016-07-26|25184"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"object":{"type":"mine","id":"4608007","name":"Alloy No 1"},"validFrom":"2018-11-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|0127321|2018-11-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"object":{"type":"operator","id":"P23835","name":"Mammoth Coal Co."},"validFrom":"2018-11-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"4608007","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4608007|P23835|2009-10-16|0127321|2018-11-09|24819"}}],"coverage":{"historyRecords":8,"edgeCount":21,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4608007","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"}}