{"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":"1102907","name":"Morris Pit"},"operator":{"type":"operator","id":"L00759","name":"Western Sand & Gravel Company"},"controller":{"type":"controller","id":"M02063","name":"Lafarge S A"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00622","name":"Lyle C  Sitterly Jr"},"object":{"type":"mine","id":"1102907","name":"Morris Pit"},"validFrom":"1950-01-01","validTo":"2006-10-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102907|M00622|1950-01-01|2006-10-05"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00759","name":"Western Sand & Gravel Company"},"object":{"type":"mine","id":"1102907","name":"Morris Pit"},"validFrom":"1990-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102907|L00759|1990-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00622","name":"Lyle C  Sitterly Jr"},"object":{"type":"operator","id":"L00759","name":"Western Sand & Gravel Company"},"validFrom":"1990-10-01","validTo":"2006-10-05","current":false,"derived":true,"evidenceMineId":"1102907","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102907|L00759|1990-10-01|M00622|1950-01-01|113503"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"mine","id":"1102907","name":"Morris Pit"},"validFrom":"2006-10-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102907|M02063|2006-10-06|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"operator","id":"L00759","name":"Western Sand & Gravel Company"},"validFrom":"2006-10-06","validTo":null,"current":true,"derived":true,"evidenceMineId":"1102907","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102907|L00759|1990-10-01|M02063|2006-10-06|123536"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1102907","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"}}