{"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":"0301150","name":"River Port"},"operator":{"type":"operator","id":"L09517","name":"B & G Sand & Gravel Inc"},"controller":{"type":"controller","id":"M04922","name":"Garner Frank J"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03496","name":"Paris Materials"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1950-01-01","validTo":"1979-08-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L03496|1950-01-01|1979-08-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02803","name":"Gilbert Blackie"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1950-01-01","validTo":"1979-08-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|M02803|1950-01-01|1979-08-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02803","name":"Gilbert Blackie"},"object":{"type":"operator","id":"L03496","name":"Paris Materials"},"validFrom":"1950-01-01","validTo":"1979-08-15","current":false,"derived":true,"evidenceMineId":"0301150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L03496|1950-01-01|M02803|1950-01-01|126979"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03497","name":"B & G Sand & Gravel Company"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1979-08-16","validTo":"1982-11-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L03497|1979-08-16|1982-11-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02804","name":"Goodwin C L"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1979-08-16","validTo":"1982-11-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|M02804|1979-08-16|1982-11-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02804","name":"Goodwin C L"},"object":{"type":"operator","id":"L03497","name":"B & G Sand & Gravel Company"},"validFrom":"1979-08-16","validTo":"1982-11-01","current":false,"derived":true,"evidenceMineId":"0301150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L03497|1979-08-16|M02804|1979-08-16|126980"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06169","name":"F G Sand & Gravel"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1982-11-02","validTo":"1984-09-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L06169|1982-11-02|1984-09-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04922","name":"Garner Frank J"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1982-11-02","validTo":"1984-09-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|M04922|1982-11-02|1984-09-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04922","name":"Garner Frank J"},"object":{"type":"operator","id":"L06169","name":"F G Sand & Gravel"},"validFrom":"1982-11-02","validTo":"1984-09-14","current":false,"derived":true,"evidenceMineId":"0301150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L06169|1982-11-02|M04922|1982-11-02|133234"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07699","name":"S & D Sand & Gravel Inc"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1984-09-15","validTo":"1987-03-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L07699|1984-09-15|1987-03-24"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06120","name":"Morris L  Denton"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1984-09-15","validTo":"1987-03-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|M06120|1984-09-15|1987-03-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06120","name":"Morris L  Denton"},"object":{"type":"operator","id":"L07699","name":"S & D Sand & Gravel Inc"},"validFrom":"1984-09-15","validTo":"1987-03-24","current":false,"derived":true,"evidenceMineId":"0301150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L07699|1984-09-15|M06120|1984-09-15|136242"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09517","name":"B & G Sand & Gravel Inc"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1987-03-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L09517|1987-03-25|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04922","name":"Garner Frank J"},"object":{"type":"mine","id":"0301150","name":"River Port"},"validFrom":"1987-03-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|M04922|1987-03-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04922","name":"Garner Frank J"},"object":{"type":"operator","id":"L09517","name":"B & G Sand & Gravel Inc"},"validFrom":"1987-03-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"0301150","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301150|L09517|1987-03-25|M04922|1987-03-25|133235"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0301150","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"}}