{"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":"1701175","name":"Patriot Road Pit"},"operator":{"type":"operator","id":"0208633","name":"E. Skip Grindle & Sons, Inc."},"controller":{"type":"controller","id":"0199641","name":"Everett  Grindle; Spencer  Grindle; Scott  Grindle"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0208633","name":"E. Skip Grindle & Sons, Inc."},"object":{"type":"mine","id":"1701175","name":"Patriot Road Pit"},"validFrom":"2026-03-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1701175|0208633|2026-03-30|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0199641","name":"Spencer  Grindle et al"},"object":{"type":"mine","id":"1701175","name":"Patriot Road Pit"},"validFrom":"2026-03-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1701175|0199641|2026-03-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0199641","name":"Spencer  Grindle et al"},"object":{"type":"operator","id":"0208633","name":"E. Skip Grindle & Sons, Inc."},"validFrom":"2026-03-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"1701175","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1701175|0208633|2026-03-30|0199641|2026-03-30|42513"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0199641","name":"Everett  Grindle et al"},"object":{"type":"operator","id":"0208633","name":"E. Skip Grindle & Sons, Inc."},"validFrom":"2026-03-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"1701175","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1701175|0208633|2026-03-30|0199641|2026-03-30|42514"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0199641","name":"Scott  Grindle et al"},"object":{"type":"operator","id":"0208633","name":"E. Skip Grindle & Sons, Inc."},"validFrom":"2026-03-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"1701175","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1701175|0208633|2026-03-30|0199641|2026-03-30|42515"}}],"coverage":{"historyRecords":3,"edgeCount":5,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1701175","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"}}