{"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":"2026-10-17T05:35:58.500035+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":"1900569","name":"MARION EXCAVATING CO., INC."},"operator":{"type":"operator","id":"0187573","name":"MARION EXCAVATING CO., INC."},"controller":{"type":"controller","id":"0175181","name":"Todd  Marion"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06184","name":"Westhampton Sand & Gravel Inc"},"object":{"type":"mine","id":"1900569","name":"MARION EXCAVATING CO., INC."},"validFrom":"1950-01-01","validTo":"1982-04-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|L06184|1950-01-01|1982-04-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04935","name":"John  Maroney"},"object":{"type":"mine","id":"1900569","name":"MARION EXCAVATING CO., INC."},"validFrom":"1950-01-01","validTo":"1982-04-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|M04935|1950-01-01|1982-04-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04935","name":"John  Maroney"},"object":{"type":"operator","id":"L06184","name":"Westhampton Sand & Gravel Inc"},"validFrom":"1950-01-01","validTo":"1982-04-01","current":false,"derived":true,"evidenceMineId":"1900569","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|L06184|1950-01-01|M04935|1950-01-01|133328"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06185","name":"Meehan Construction Company Inc"},"object":{"type":"mine","id":"1900569","name":"MARION EXCAVATING CO., INC."},"validFrom":"1982-04-02","validTo":"2022-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|L06185|1982-04-02|2022-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04936","name":"James E  Meehan"},"object":{"type":"mine","id":"1900569","name":"MARION EXCAVATING CO., INC."},"validFrom":"1982-04-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|M04936|1982-04-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04936","name":"James E  Meehan"},"object":{"type":"operator","id":"L06185","name":"Meehan Construction Company Inc"},"validFrom":"1982-04-02","validTo":"2022-12-31","current":false,"derived":true,"evidenceMineId":"1900569","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|L06185|1982-04-02|M04936|1982-04-02|133329"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0187573","name":"Marion Excavating Co., Inc."},"object":{"type":"mine","id":"1900569","name":"MARION EXCAVATING CO., INC."},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|0187573|2023-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0175181","name":"Todd  Marion"},"object":{"type":"mine","id":"1900569","name":"MARION EXCAVATING CO., INC."},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|0175181|2023-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0175181","name":"Todd  Marion"},"object":{"type":"operator","id":"0187573","name":"Marion Excavating Co., Inc."},"validFrom":"2023-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1900569","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1900569|0187573|2023-01-01|0175181|2023-01-01|37393"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1900569","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}