{"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":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"operator":{"type":"operator","id":"L11249","name":"US Aggregates LLC"},"controller":{"type":"controller","id":"M01806","name":"The Heritage Group"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00237","name":"Meshberger Brothers Stone Corp"},"object":{"type":"mine","id":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"validFrom":"1950-01-01","validTo":"2012-11-18","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L00237|1950-01-01|2012-11-18"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00198","name":"Walter Craig  Coshow et al"},"object":{"type":"mine","id":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"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":"1200072|M00198|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00198","name":"Walter Craig  Coshow et al"},"object":{"type":"operator","id":"L00237","name":"Meshberger Brothers Stone Corp"},"validFrom":"1950-01-01","validTo":"2012-11-18","current":false,"derived":true,"evidenceMineId":"1200072","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L00237|1950-01-01|M00198|1950-01-01|107238"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00198","name":"Carolyn S  Fryback et al"},"object":{"type":"operator","id":"L00237","name":"Meshberger Brothers Stone Corp"},"validFrom":"1950-01-01","validTo":"2012-11-18","current":false,"derived":true,"evidenceMineId":"1200072","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L00237|1950-01-01|M00198|1950-01-01|107239"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01806","name":"The Heritage Group"},"object":{"type":"mine","id":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"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":"1200072|M01806|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01806","name":"The Heritage Group"},"object":{"type":"mine","id":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"validFrom":"1989-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|M01806|1989-06-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11249","name":"Heritage Aggregates, LLC"},"object":{"type":"mine","id":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"validFrom":"2012-11-19","validTo":"2020-04-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L11249|2012-11-19|2020-04-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01806","name":"The Heritage Group"},"object":{"type":"operator","id":"L11249","name":"Heritage Aggregates, LLC"},"validFrom":"2012-11-19","validTo":"2020-04-20","current":false,"derived":true,"evidenceMineId":"1200072","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L11249|2012-11-19|M01806|1989-06-01|121311"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02006","name":"US Aggregates Inc"},"object":{"type":"mine","id":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"validFrom":"2020-04-21","validTo":"2026-06-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L02006|2020-04-21|2026-06-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01806","name":"The Heritage Group"},"object":{"type":"operator","id":"L02006","name":"US Aggregates Inc"},"validFrom":"2020-04-21","validTo":"2026-06-17","current":false,"derived":true,"evidenceMineId":"1200072","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L02006|2020-04-21|M01806|1950-01-01|121279"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11249","name":"US Aggregates LLC"},"object":{"type":"mine","id":"1200072","name":"US Aggregates-Pleasant Mills Quarry"},"validFrom":"2026-06-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L11249|2026-06-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01806","name":"The Heritage Group"},"object":{"type":"operator","id":"L11249","name":"US Aggregates LLC"},"validFrom":"2026-06-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"1200072","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200072|L11249|2026-06-18|M01806|1989-06-01|121312"}}],"coverage":{"historyRecords":5,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1200072","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"}}