{"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":"4400271","name":"Red Onion No. 1"},"operator":{"type":"operator","id":"0161733","name":"PMO Virginia LLC"},"controller":{"type":"controller","id":"0145861","name":"Michael D  Robinson; James T  O'Connor"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P00653","name":"Clinchfield Coal Company"},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"1950-01-01","validTo":"2009-10-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|P00653|1950-01-01|2009-10-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C00230","name":"Pittston Company"},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|C00230|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C00230","name":"Pittston Company"},"object":{"type":"operator","id":"P00653","name":"Clinchfield Coal Company"},"validFrom":"1950-01-01","validTo":"2009-10-25","current":false,"derived":true,"evidenceMineId":"4400271","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|P00653|1950-01-01|C00230|1950-01-01|45056"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"2002-12-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0041211|2002-12-13|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0050878","name":"Dickenson-Russell Coal Company LLC"},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"2009-10-26","validTo":"2016-07-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0050878|2009-10-26|2016-07-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"0050878","name":"Dickenson-Russell Coal Company LLC"},"validFrom":"2009-10-26","validTo":"2016-07-25","current":false,"derived":true,"evidenceMineId":"4400271","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0050878|2009-10-26|0041211|2002-12-13|1572"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0146275","name":"Dickenson-Russell Contura, LLC"},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"2016-07-26","validTo":"2019-01-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0146275|2016-07-26|2019-01-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"2016-07-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0127321|2016-07-26|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127321","name":"Alpha Metallurgical Resources Inc"},"object":{"type":"operator","id":"0146275","name":"Dickenson-Russell Contura, LLC"},"validFrom":"2016-07-26","validTo":"2019-01-27","current":false,"derived":true,"evidenceMineId":"4400271","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0146275|2016-07-26|0127321|2016-07-26|24719"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0161733","name":"PMO Virginia LLC"},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"2019-01-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0161733|2019-01-28|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0145861","name":"James T  O'Connor et al"},"object":{"type":"mine","id":"4400271","name":"Red Onion No. 1"},"validFrom":"2019-01-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0145861|2019-01-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0145861","name":"James T  O'Connor et al"},"object":{"type":"operator","id":"0161733","name":"PMO Virginia LLC"},"validFrom":"2019-01-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"4400271","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0161733|2019-01-28|0145861|2019-01-28|29885"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0145861","name":"Michael D  Robinson et al"},"object":{"type":"operator","id":"0161733","name":"PMO Virginia LLC"},"validFrom":"2019-01-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"4400271","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4400271|0161733|2019-01-28|0145861|2019-01-28|29886"}}],"coverage":{"historyRecords":5,"edgeCount":13,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4400271","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"}}