{"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":"4503770","name":"Elwha Gravel Pit"},"operator":{"type":"operator","id":"0143434","name":"Interwest Construction Inc."},"controller":{"type":"controller","id":"0123043","name":"Eben  Twaddle"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0123043","name":"Eben  Twaddle"},"object":{"type":"mine","id":"4503770","name":"Elwha Gravel Pit"},"validFrom":"2016-01-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503770|0123043|2016-01-20|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0152213","name":"North Hill Resources"},"object":{"type":"mine","id":"4503770","name":"Elwha Gravel Pit"},"validFrom":"2017-03-21","validTo":"2018-12-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503770|0152213|2017-03-21|2018-12-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0134901","name":"Sean  McGuiness"},"object":{"type":"mine","id":"4503770","name":"Elwha Gravel Pit"},"validFrom":"2017-03-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503770|0134901|2017-03-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0134901","name":"Sean  McGuiness"},"object":{"type":"operator","id":"0152213","name":"North Hill Resources"},"validFrom":"2017-03-21","validTo":"2018-12-31","current":false,"derived":true,"evidenceMineId":"4503770","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503770|0152213|2017-03-21|0134901|2017-03-21|27123"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0143434","name":"Interwest Construction Inc."},"object":{"type":"mine","id":"4503770","name":"Elwha Gravel Pit"},"validFrom":"2019-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503770|0143434|2019-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0123043","name":"Eben  Twaddle"},"object":{"type":"operator","id":"0143434","name":"Interwest Construction Inc."},"validFrom":"2019-01-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4503770","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"4503770|0143434|2019-01-01|0123043|2016-01-20|23928"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4503770","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"}}