{"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":"2000024","name":"Monroe Stone Quarry"},"operator":{"type":"operator","id":"L10601","name":"France Stone Company"},"controller":{"type":"controller","id":"M00521","name":"Hanson PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00364","name":"France Stone Company"},"object":{"type":"mine","id":"2000024","name":"Monroe Stone Quarry"},"validFrom":"1950-01-01","validTo":"1986-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|L00364|1950-01-01|1986-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00300","name":"France Stone Company"},"object":{"type":"mine","id":"2000024","name":"Monroe Stone Quarry"},"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":"2000024|M00300|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00300","name":"France Stone Company"},"object":{"type":"operator","id":"L00364","name":"France Stone Company"},"validFrom":"1950-01-01","validTo":"1986-09-30","current":false,"derived":true,"evidenceMineId":"2000024","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|L00364|1950-01-01|M00300|1950-01-01|109186"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08837","name":"France Stone Company"},"object":{"type":"mine","id":"2000024","name":"Monroe Stone Quarry"},"validFrom":"1986-10-01","validTo":"1988-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|L08837|1986-10-01|1988-11-13"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00002","name":"Koppers Company Inc"},"object":{"type":"mine","id":"2000024","name":"Monroe Stone Quarry"},"validFrom":"1986-10-01","validTo":"1988-11-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|M00002|1986-10-01|1988-11-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00002","name":"Koppers Company Inc"},"object":{"type":"operator","id":"L08837","name":"France Stone Company"},"validFrom":"1986-10-01","validTo":"1988-11-13","current":false,"derived":true,"evidenceMineId":"2000024","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|L08837|1986-10-01|M00002|1986-10-01|100404"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10601","name":"France Stone Company"},"object":{"type":"mine","id":"2000024","name":"Monroe Stone Quarry"},"validFrom":"1988-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|L10601|1988-11-14|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"2000024","name":"Monroe Stone Quarry"},"validFrom":"1988-11-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|M00521|1988-11-14|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L10601","name":"France Stone Company"},"validFrom":"1988-11-14","validTo":null,"current":true,"derived":true,"evidenceMineId":"2000024","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000024|L10601|1988-11-14|M00521|1988-11-14|112439"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2000024","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"}}