{"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":"4700746","name":"West Quarry"},"operator":{"type":"operator","id":"L00630","name":"Lannon Stone Products Inc"},"controller":{"type":"controller","id":"0166401","name":"Dawson Trust dated June 20 2009"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00524","name":"James D  Dawson"},"object":{"type":"mine","id":"4700746","name":"West Quarry"},"validFrom":"1950-01-01","validTo":"2022-01-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|M00524|1950-01-01|2022-01-20"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00976","name":"Halquist Stone Company Inc"},"object":{"type":"mine","id":"4700746","name":"West Quarry"},"validFrom":"1950-01-01","validTo":"2018-12-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|L00976|1950-01-01|2018-12-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00836","name":"Bill  Halquist et al"},"object":{"type":"mine","id":"4700746","name":"West 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":"4700746|M00836|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00836","name":"Bill  Halquist et al"},"object":{"type":"operator","id":"L00976","name":"Halquist Stone Company Inc"},"validFrom":"1950-01-01","validTo":"2018-12-27","current":false,"derived":true,"evidenceMineId":"4700746","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|L00976|1950-01-01|M00836|1950-01-01|115175"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00836","name":"Tom  Halquist et al"},"object":{"type":"operator","id":"L00976","name":"Halquist Stone Company Inc"},"validFrom":"1950-01-01","validTo":"2018-12-27","current":false,"derived":true,"evidenceMineId":"4700746","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|L00976|1950-01-01|M00836|1950-01-01|115176"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00630","name":"Lannon Stone Products Inc"},"object":{"type":"mine","id":"4700746","name":"West Quarry"},"validFrom":"2018-12-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|L00630|2018-12-28|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00524","name":"James D  Dawson"},"object":{"type":"operator","id":"L00630","name":"Lannon Stone Products Inc"},"validFrom":"2018-12-28","validTo":"2022-01-20","current":false,"derived":true,"evidenceMineId":"4700746","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|L00630|2018-12-28|M00524|1950-01-01|112730"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0166401","name":"Dawson Trust dated June 20 2009"},"object":{"type":"mine","id":"4700746","name":"West Quarry"},"validFrom":"2022-01-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|0166401|2022-01-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0166401","name":"Dawson Trust dated June 20 2009"},"object":{"type":"operator","id":"L00630","name":"Lannon Stone Products Inc"},"validFrom":"2022-01-21","validTo":null,"current":true,"derived":true,"evidenceMineId":"4700746","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4700746|L00630|2018-12-28|0166401|2022-01-21|34947"}}],"coverage":{"historyRecords":4,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4700746","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"}}