{"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":"4801308","name":"C & B SAND & GRAVEL"},"operator":{"type":"operator","id":"L31372","name":"C & B Sand & Gravel"},"controller":{"type":"controller","id":"0170661","name":"Donald R Corson Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L31372","name":"C & B Sand & Gravel"},"object":{"type":"mine","id":"4801308","name":"C & B SAND & GRAVEL"},"validFrom":"1980-02-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801308|L31372|1980-02-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M31372","name":"Donald Ralph  Corson Jr et al"},"object":{"type":"mine","id":"4801308","name":"C & B SAND & GRAVEL"},"validFrom":"1980-02-01","validTo":"2022-07-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801308|M31372|1980-02-01|2022-07-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M31372","name":"Donald Ralph  Corson Jr et al"},"object":{"type":"operator","id":"L31372","name":"C & B Sand & Gravel"},"validFrom":"1980-02-01","validTo":"2022-07-10","current":false,"derived":true,"evidenceMineId":"4801308","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801308|L31372|1980-02-01|M31372|1980-02-01|159681"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0170661","name":"Donald R Corson Jr"},"object":{"type":"mine","id":"4801308","name":"C & B SAND & GRAVEL"},"validFrom":"2022-07-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801308|0170661|2022-07-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0170661","name":"Donald R Corson Jr"},"object":{"type":"operator","id":"L31372","name":"C & B Sand & Gravel"},"validFrom":"2022-07-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"4801308","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4801308|L31372|1980-02-01|0170661|2022-07-11|36157"}}],"coverage":{"historyRecords":2,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4801308","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"}}