{"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":"0202681","name":"Buckeye Sand & Gravel"},"operator":{"type":"operator","id":"0063963","name":"Buckeye Sand & Gravel"},"controller":{"type":"controller","id":"0053509","name":"Howard  Libby; Rick  Barnas"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15002","name":"Alleco Stone Llc"},"object":{"type":"mine","id":"0202681","name":"Buckeye Sand & Gravel"},"validFrom":"1997-01-01","validTo":"2003-12-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|L15002|1997-01-01|2003-12-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11420","name":"Tom  Mattingly"},"object":{"type":"mine","id":"0202681","name":"Buckeye Sand & Gravel"},"validFrom":"1997-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|M11420|1997-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11420","name":"Tom  Mattingly"},"object":{"type":"operator","id":"L15002","name":"Alleco Stone Llc"},"validFrom":"1997-01-01","validTo":"2003-12-14","current":false,"derived":true,"evidenceMineId":"0202681","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|L15002|1997-01-01|M11420|1997-01-01|151406"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051960","name":"Buckeye Sand & Gravel"},"object":{"type":"mine","id":"0202681","name":"Buckeye Sand & Gravel"},"validFrom":"2003-12-15","validTo":"2005-09-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|0051960|2003-12-15|2005-09-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0042741","name":"Jason  Libby"},"object":{"type":"mine","id":"0202681","name":"Buckeye Sand & Gravel"},"validFrom":"2003-12-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|0042741|2003-12-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0042741","name":"Jason  Libby"},"object":{"type":"operator","id":"0051960","name":"Buckeye Sand & Gravel"},"validFrom":"2003-12-15","validTo":"2005-09-09","current":false,"derived":true,"evidenceMineId":"0202681","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|0051960|2003-12-15|0042741|2003-12-15|4219"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0063963","name":"Buckeye Sand & Gravel"},"object":{"type":"mine","id":"0202681","name":"Buckeye Sand & Gravel"},"validFrom":"2005-09-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|0063963|2005-09-10|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0053509","name":"Howard  Libby  et al"},"object":{"type":"mine","id":"0202681","name":"Buckeye Sand & Gravel"},"validFrom":"2005-09-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|0053509|2005-09-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0053509","name":"Howard  Libby  et al"},"object":{"type":"operator","id":"0063963","name":"Buckeye Sand & Gravel"},"validFrom":"2005-09-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"0202681","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|0063963|2005-09-10|0053509|2005-09-10|6834"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0053509","name":"Rick  Barnas  et al"},"object":{"type":"operator","id":"0063963","name":"Buckeye Sand & Gravel"},"validFrom":"2005-09-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"0202681","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0202681|0063963|2005-09-10|0053509|2005-09-10|6835"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0202681","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"}}