{"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":"1517053","name":"Elizabethtown"},"operator":{"type":"operator","id":"L16168","name":"Vulcan Constr. Materials, L.P."},"controller":{"type":"controller","id":"0071891","name":"Vulcan Materials Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00024","name":"Legacy Vulcan Corp (Form:Vulcan Materials Co)"},"object":{"type":"mine","id":"1517053","name":"Elizabethtown"},"validFrom":"1950-01-01","validTo":"2007-11-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|M00024|1950-01-01|2007-11-15"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13397","name":"Cox'S Quarry"},"object":{"type":"mine","id":"1517053","name":"Elizabethtown"},"validFrom":"1991-04-01","validTo":"1994-02-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|L13397|1991-04-01|1994-02-04"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10230","name":"Greg  Cox  et al"},"object":{"type":"mine","id":"1517053","name":"Elizabethtown"},"validFrom":"1991-04-01","validTo":"1994-02-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|M10230|1991-04-01|1994-02-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10230","name":"Greg  Cox  et al"},"object":{"type":"operator","id":"L13397","name":"Cox'S Quarry"},"validFrom":"1991-04-01","validTo":"1994-02-04","current":false,"derived":true,"evidenceMineId":"1517053","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|L13397|1991-04-01|M10230|1991-04-01|148662"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09049","name":"Larry T  Glass"},"object":{"type":"mine","id":"1517053","name":"Elizabethtown"},"validFrom":"1992-03-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|M09049|1992-03-16|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12551","name":"Hart County Stone Company"},"object":{"type":"mine","id":"1517053","name":"Elizabethtown"},"validFrom":"1994-02-05","validTo":"2003-05-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|L12551|1994-02-05|2003-05-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09049","name":"Larry T  Glass"},"object":{"type":"operator","id":"L12551","name":"Hart County Stone Company"},"validFrom":"1994-02-05","validTo":"2003-05-20","current":false,"derived":true,"evidenceMineId":"1517053","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|L12551|1994-02-05|M09049|1992-03-16|144973"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16168","name":"Vulcan Constr. Materials, L.P."},"object":{"type":"mine","id":"1517053","name":"Elizabethtown"},"validFrom":"2003-05-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|L16168|2003-05-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00024","name":"Legacy Vulcan Corp (Form:Vulcan Materials Co)"},"object":{"type":"operator","id":"L16168","name":"Vulcan Constr. Materials, L.P."},"validFrom":"2003-05-21","validTo":"2007-11-15","current":false,"derived":true,"evidenceMineId":"1517053","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|L16168|2003-05-21|M00024|1950-01-01|101760"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0071891","name":"Vulcan Materials Company"},"object":{"type":"mine","id":"1517053","name":"Elizabethtown"},"validFrom":"2007-11-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|0071891|2007-11-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0071891","name":"Vulcan Materials Company"},"object":{"type":"operator","id":"L16168","name":"Vulcan Constr. Materials, L.P."},"validFrom":"2007-11-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"1517053","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1517053|L16168|2003-05-21|0071891|2007-11-16|10823"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1517053","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"}}