{"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":"2800001","name":"Riverdale Quarry"},"operator":{"type":"operator","id":"0202473","name":"Riverdale Quarry LLC"},"controller":{"type":"controller","id":"0192441","name":"Roger  Mahan; Gary  Mahan"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12139","name":"Riverdale Quarry Company"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"1950-01-01","validTo":"1995-04-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|L12139|1950-01-01|1995-04-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05060","name":"Robert  Hess"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"1950-01-01","validTo":"1995-04-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|M05060|1950-01-01|1995-04-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05060","name":"Robert  Hess"},"object":{"type":"operator","id":"L12139","name":"Riverdale Quarry Company"},"validFrom":"1950-01-01","validTo":"1995-04-05","current":false,"derived":true,"evidenceMineId":"2800001","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|L12139|1950-01-01|M05060|1950-01-01|133566"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14049","name":"Riverdale Quarry Llc"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"1995-04-06","validTo":"1999-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|L14049|1995-04-06|1999-06-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10827","name":"287 Associates Llc et al"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"1995-04-06","validTo":"1999-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|M10827|1995-04-06|1999-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10827","name":"287 Associates Llc et al"},"object":{"type":"operator","id":"L14049","name":"Riverdale Quarry Llc"},"validFrom":"1995-04-06","validTo":"1999-06-30","current":false,"derived":true,"evidenceMineId":"2800001","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|L14049|1995-04-06|M10827|1995-04-06|150080"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"1996-09-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|M06183|1996-09-09|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15562","name":"Tilcon New York Inc"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"1999-07-01","validTo":"2025-04-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|L15562|1999-07-01|2025-04-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L15562","name":"Tilcon New York Inc"},"validFrom":"1999-07-01","validTo":"2025-04-14","current":false,"derived":true,"evidenceMineId":"2800001","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|L15562|1999-07-01|M06183|1996-09-09|136685"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0202473","name":"Riverdale Quarry LLC"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"2025-04-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|0202473|2025-04-15|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0192441","name":"Gary  Mahan et al"},"object":{"type":"mine","id":"2800001","name":"Riverdale Quarry"},"validFrom":"2025-04-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|0192441|2025-04-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0192441","name":"Gary  Mahan et al"},"object":{"type":"operator","id":"0202473","name":"Riverdale Quarry LLC"},"validFrom":"2025-04-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"2800001","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|0202473|2025-04-15|0192441|2025-04-15|40952"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0192441","name":"Roger  Mahan et al"},"object":{"type":"operator","id":"0202473","name":"Riverdale Quarry LLC"},"validFrom":"2025-04-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"2800001","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2800001|0202473|2025-04-15|0192441|2025-04-15|40953"}}],"coverage":{"historyRecords":5,"edgeCount":13,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2800001","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"}}