{"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":"1001367","name":"Barnes Pit"},"operator":{"type":"operator","id":"L06833","name":"City Transfer Redimix Inc"},"controller":{"type":"controller","id":"M05448","name":"Larry  Sawyer"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"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":"1001367|M00174|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03301","name":"Sherman County - KS"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"validFrom":"1950-01-01","validTo":"1979-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|M03301|1950-01-01|1979-04-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05448","name":"Larry  Sawyer"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"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":"1001367|M05448|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04111","name":"Wedron Silica Division"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"validFrom":"1978-03-09","validTo":"1979-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L04111|1978-03-09|1979-04-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03301","name":"Sherman County - KS"},"object":{"type":"operator","id":"L04111","name":"Wedron Silica Division"},"validFrom":"1978-03-09","validTo":"1979-04-30","current":false,"derived":true,"evidenceMineId":"1001367","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L04111|1978-03-09|M03301|1950-01-01|128691"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01910","name":"Wedron Silica Company"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"validFrom":"1979-05-01","validTo":"1979-09-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L01910|1979-05-01|1979-09-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01720","name":"Twentieth Century Fox"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"validFrom":"1979-05-01","validTo":"1979-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|M01720|1979-05-01|1979-10-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01720","name":"Twentieth Century Fox"},"object":{"type":"operator","id":"L01910","name":"Wedron Silica Company"},"validFrom":"1979-05-01","validTo":"1979-09-11","current":false,"derived":true,"evidenceMineId":"1001367","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L01910|1979-05-01|M01720|1979-05-01|120565"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"validFrom":"1979-09-12","validTo":"1983-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L00208|1979-09-12|1983-07-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"validFrom":"1979-09-12","validTo":"1983-07-31","current":false,"derived":true,"evidenceMineId":"1001367","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L00208|1979-09-12|M00174|1950-01-01|105687"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06833","name":"City Transfer Redimix Inc"},"object":{"type":"mine","id":"1001367","name":"Barnes Pit"},"validFrom":"1983-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L06833|1983-08-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05448","name":"Larry  Sawyer"},"object":{"type":"operator","id":"L06833","name":"City Transfer Redimix Inc"},"validFrom":"1983-08-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1001367","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1001367|L06833|1983-08-01|M05448|1950-01-01|134656"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1001367","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"}}