{"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":"4500574","name":"Smokey Point Pit"},"operator":{"type":"operator","id":"0132473","name":"Smokey Point Concrete"},"controller":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07479","name":"Arlington Sand & Gravel"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1950-01-01","validTo":"1984-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L07479|1950-01-01|1984-05-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05944","name":"Michael G  Brown"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1950-01-01","validTo":"1984-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|M05944|1950-01-01|1984-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05944","name":"Michael G  Brown"},"object":{"type":"operator","id":"L07479","name":"Arlington Sand & Gravel"},"validFrom":"1950-01-01","validTo":"1984-05-31","current":false,"derived":true,"evidenceMineId":"4500574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L07479|1950-01-01|M05944|1950-01-01|135813"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07480","name":"Arlington Sand & Gravel Inc"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1984-06-01","validTo":"1990-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L07480|1984-06-01|1990-09-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05945","name":"Jane A  Hallock"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1984-06-01","validTo":"1990-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|M05945|1984-06-01|1990-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05945","name":"Jane A  Hallock"},"object":{"type":"operator","id":"L07480","name":"Arlington Sand & Gravel Inc"},"validFrom":"1984-06-01","validTo":"1990-09-30","current":false,"derived":true,"evidenceMineId":"4500574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L07480|1984-06-01|M05945|1984-06-01|135816"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12010","name":"Arlington Sand & Gravel"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1990-10-01","validTo":"1992-03-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L12010|1990-10-01|1992-03-23"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1990-10-01","validTo":"1992-03-23","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|M07897|1990-10-01|1992-03-23"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"object":{"type":"operator","id":"L12010","name":"Arlington Sand & Gravel"},"validFrom":"1990-10-01","validTo":"1992-03-23","current":false,"derived":true,"evidenceMineId":"4500574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L12010|1990-10-01|M07897|1990-10-01|142217"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12603","name":"Smokey Point Concrete Inc"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1992-03-24","validTo":"2014-03-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L12603|1992-03-24|2014-03-04"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09659","name":"Mark D  Crawford"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"1992-03-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|M09659|1992-03-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09659","name":"Mark D  Crawford"},"object":{"type":"operator","id":"L12603","name":"Smokey Point Concrete Inc"},"validFrom":"1992-03-24","validTo":"2014-03-04","current":false,"derived":true,"evidenceMineId":"4500574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|L12603|1992-03-24|M09659|1992-03-24|146893"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0132473","name":"Smokey Point Concrete"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"2014-03-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|0132473|2014-03-05|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"object":{"type":"mine","id":"4500574","name":"Smokey Point Pit"},"validFrom":"2014-03-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|M07897|2014-03-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07897","name":"Taiheiyo Cement Corp"},"object":{"type":"operator","id":"0132473","name":"Smokey Point Concrete"},"validFrom":"2014-03-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"4500574","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500574|0132473|2014-03-05|M07897|2014-03-05|142275"}}],"coverage":{"historyRecords":5,"edgeCount":15,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4500574","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"}}