{"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":"3101884","name":"BROAD RIVER DREDGE"},"operator":{"type":"operator","id":"0129373","name":"Ameri-con Materials Inc."},"controller":{"type":"controller","id":"0110021","name":"Jason C  Deck"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03305","name":"Calton & Deck"},"object":{"type":"mine","id":"3101884","name":"BROAD RIVER DREDGE"},"validFrom":"1979-01-01","validTo":"1997-01-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|L03305|1979-01-01|1997-01-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02652","name":"Wm A  Calton  et al"},"object":{"type":"mine","id":"3101884","name":"BROAD RIVER DREDGE"},"validFrom":"1979-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|M02652|1979-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02652","name":"Wm A  Calton  et al"},"object":{"type":"operator","id":"L03305","name":"Calton & Deck"},"validFrom":"1979-01-01","validTo":"1997-01-21","current":false,"derived":true,"evidenceMineId":"3101884","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|L03305|1979-01-01|M02652|1979-01-01|126443"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02652","name":"James L  Deck  et al"},"object":{"type":"operator","id":"L03305","name":"Calton & Deck"},"validFrom":"1979-01-01","validTo":"1997-01-21","current":false,"derived":true,"evidenceMineId":"3101884","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|L03305|1979-01-01|M02652|1979-01-01|126444"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15061","name":"Deck Sand Company Inc"},"object":{"type":"mine","id":"3101884","name":"BROAD RIVER DREDGE"},"validFrom":"1997-01-22","validTo":"2013-06-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|L15061|1997-01-22|2013-06-29"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11470","name":"James L  Deck"},"object":{"type":"mine","id":"3101884","name":"BROAD RIVER DREDGE"},"validFrom":"1997-01-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|M11470|1997-01-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11470","name":"James L  Deck"},"object":{"type":"operator","id":"L15061","name":"Deck Sand Company Inc"},"validFrom":"1997-01-22","validTo":"2013-06-29","current":false,"derived":true,"evidenceMineId":"3101884","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|L15061|1997-01-22|M11470|1997-01-22|151496"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0129373","name":"Ameri-con Materials Inc."},"object":{"type":"mine","id":"3101884","name":"BROAD RIVER DREDGE"},"validFrom":"2013-06-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|0129373|2013-06-30|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0110021","name":"Jason C  Deck"},"object":{"type":"mine","id":"3101884","name":"BROAD RIVER DREDGE"},"validFrom":"2013-06-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|0110021|2013-06-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0110021","name":"Jason C  Deck"},"object":{"type":"operator","id":"0129373","name":"Ameri-con Materials Inc."},"validFrom":"2013-06-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"3101884","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3101884|0129373|2013-06-30|0110021|2013-06-30|20098"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3101884","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"}}