{"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":"4103154","name":"Shower's Plant"},"operator":{"type":"operator","id":"L16168","name":"Vulcan Construction Materials, LLC"},"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":"4103154","name":"Shower's Plant"},"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":"4103154|M00024|1950-01-01|2007-11-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00473","name":"Robert W  Briggs"},"object":{"type":"mine","id":"4103154","name":"Shower's Plant"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|M00473|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11111","name":"Central Caliche Products"},"object":{"type":"mine","id":"4103154","name":"Shower's Plant"},"validFrom":"1983-02-01","validTo":"1988-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|L11111|1983-02-01|1988-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08600","name":"Joe  Airhart  et al"},"object":{"type":"mine","id":"4103154","name":"Shower's Plant"},"validFrom":"1983-02-01","validTo":"1988-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|M08600|1983-02-01|1988-12-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08600","name":"Joe  Airhart  et al"},"object":{"type":"operator","id":"L11111","name":"Central Caliche Products"},"validFrom":"1983-02-01","validTo":"1988-12-31","current":false,"derived":true,"evidenceMineId":"4103154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|L11111|1983-02-01|M08600|1983-02-01|143709"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00557","name":"Fordyce Holdings Inc"},"object":{"type":"mine","id":"4103154","name":"Shower's Plant"},"validFrom":"1989-01-01","validTo":"2022-02-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|L00557|1989-01-01|2022-02-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00473","name":"Robert W  Briggs"},"object":{"type":"operator","id":"L00557","name":"Fordyce Holdings Inc"},"validFrom":"1989-01-01","validTo":"2022-02-27","current":false,"derived":true,"evidenceMineId":"4103154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|L00557|1989-01-01|M00473|1950-01-01|111631"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0071891","name":"Vulcan Materials Company"},"object":{"type":"mine","id":"4103154","name":"Shower's Plant"},"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":"4103154|0071891|2007-11-16|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16168","name":"Vulcan Construction Materials, LLC"},"object":{"type":"mine","id":"4103154","name":"Shower's Plant"},"validFrom":"2022-02-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|L16168|2022-02-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0071891","name":"Vulcan Materials Company"},"object":{"type":"operator","id":"L16168","name":"Vulcan Construction Materials, LLC"},"validFrom":"2022-02-28","validTo":null,"current":true,"derived":true,"evidenceMineId":"4103154","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|L16168|2022-02-28|0071891|2007-11-16|11001"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00024","name":"Legacy Vulcan Corp (Form:Vulcan Materials Co)"},"object":{"type":"operator","id":"L16168","name":"Vulcan Construction Materials, LLC"},"validFrom":"2022-02-28","validTo":"2007-11-15","current":false,"derived":true,"evidenceMineId":"4103154","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103154|L16168|2022-02-28|M00024|1950-01-01|101916"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4103154","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"}}