{"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":"0504136","name":"Red Canyon Quarry"},"operator":{"type":"operator","id":"L16197","name":"Martin Marietta Materials Inc."},"controller":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"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":"0504136","name":"Red Canyon Quarry"},"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":"0504136|M00174|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12479","name":"C & C Sand Company Inc"},"object":{"type":"mine","id":"0504136","name":"Red Canyon Quarry"},"validFrom":"1986-02-01","validTo":"1991-12-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|L12479|1986-02-01|1991-12-06"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09572","name":"Clinton A  Williams"},"object":{"type":"mine","id":"0504136","name":"Red Canyon Quarry"},"validFrom":"1986-02-01","validTo":"1991-12-06","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|M09572|1986-02-01|1991-12-06"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09572","name":"Clinton A  Williams"},"object":{"type":"operator","id":"L12479","name":"C & C Sand Company Inc"},"validFrom":"1986-02-01","validTo":"1991-12-06","current":false,"derived":true,"evidenceMineId":"0504136","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|L12479|1986-02-01|M09572|1986-02-01|146748"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04747","name":"Stephen  Schnurr"},"object":{"type":"mine","id":"0504136","name":"Red Canyon Quarry"},"validFrom":"1990-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|M04747|1990-11-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11985","name":"Rocky Mountain Materials & Asphalt Inc"},"object":{"type":"mine","id":"0504136","name":"Red Canyon Quarry"},"validFrom":"1991-12-07","validTo":"2016-03-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|L11985|1991-12-07|2016-03-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04747","name":"Stephen  Schnurr"},"object":{"type":"operator","id":"L11985","name":"Rocky Mountain Materials & Asphalt Inc"},"validFrom":"1991-12-07","validTo":"2016-03-17","current":false,"derived":true,"evidenceMineId":"0504136","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|L11985|1991-12-07|M04747|1990-11-01|132643"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16197","name":"Martin Marietta Materials Inc."},"object":{"type":"mine","id":"0504136","name":"Red Canyon Quarry"},"validFrom":"2016-03-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|L16197|2016-03-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L16197","name":"Martin Marietta Materials Inc."},"validFrom":"2016-03-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"0504136","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504136|L16197|2016-03-18|M00174|1950-01-01|105628"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0504136","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"}}