{"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":"0504614","name":"POWER SCREEN-0504614"},"operator":{"type":"operator","id":"0097925","name":"Bestway Concrete & Aggregates"},"controller":{"type":"controller","id":"0117981","name":"Burnco Rock Products Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M33994","name":"George W  Hall et al"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"1988-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|M33994|1988-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L33994","name":"Hall-Irwin Construction Company"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"1998-05-01","validTo":"2006-02-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|L33994|1998-05-01|2006-02-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M33994","name":"George W  Hall et al"},"object":{"type":"operator","id":"L33994","name":"Hall-Irwin Construction Company"},"validFrom":"1998-05-01","validTo":"2006-02-01","current":false,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|L33994|1998-05-01|M33994|1988-01-01|162652"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M33994","name":"George W  Hall et al"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2003-07-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|M33994|2003-07-08|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051508","name":"Hall-Irwin Corporation"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2006-02-02","validTo":"2010-07-13","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0051508|2006-02-02|2010-07-13"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M33994","name":"George W  Hall et al"},"object":{"type":"operator","id":"0051508","name":"Hall-Irwin Corporation"},"validFrom":"2006-02-02","validTo":"2010-07-13","current":false,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0051508|2006-02-02|M33994|2003-07-08|162657"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0082493","name":"Bret  Hall et al"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2009-02-13","validTo":"2017-02-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0082493|2009-02-13|2017-02-26"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0111765","name":"Hall-Irwin Aggregates LLC"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2010-07-14","validTo":"2012-06-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0111765|2010-07-14|2012-06-20"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M33994","name":"George W  Hall et al"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2010-07-14","validTo":"2011-07-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|M33994|2010-07-14|2011-07-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M33994","name":"George W  Hall et al"},"object":{"type":"operator","id":"0111765","name":"Hall-Irwin Aggregates LLC"},"validFrom":"2010-07-14","validTo":"2011-07-11","current":false,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0111765|2010-07-14|M33994|2010-07-14|162665"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0082493","name":"Scott  Masi et al"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2011-07-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0082493|2011-07-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0082493","name":"Scott  Masi et al"},"object":{"type":"operator","id":"0111765","name":"Hall-Irwin Aggregates LLC"},"validFrom":"2011-07-12","validTo":"2012-06-20","current":false,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0111765|2010-07-14|0082493|2011-07-12|13127"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0082493","name":"Bret  Hall et al"},"object":{"type":"operator","id":"0111765","name":"Hall-Irwin Aggregates LLC"},"validFrom":"2011-07-12","validTo":"2012-06-20","current":false,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0111765|2010-07-14|0082493|2011-07-12|13128"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0097925","name":"Bestway Concrete & Aggregates"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2012-06-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0097925|2012-06-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0082493","name":"Bret  Hall et al"},"object":{"type":"operator","id":"0097925","name":"Bestway Concrete & Aggregates"},"validFrom":"2012-06-21","validTo":"2017-02-26","current":false,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0097925|2012-06-21|0082493|2009-02-13|13103"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0082493","name":"Scott  Masi et al"},"object":{"type":"operator","id":"0097925","name":"Bestway Concrete & Aggregates"},"validFrom":"2012-06-21","validTo":"2017-02-26","current":false,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0097925|2012-06-21|0082493|2009-02-13|13104"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0117981","name":"Burnco Rock Products Ltd"},"object":{"type":"mine","id":"0504614","name":"POWER SCREEN-0504614"},"validFrom":"2017-02-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0117981|2017-02-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0117981","name":"Burnco Rock Products Ltd"},"object":{"type":"operator","id":"0097925","name":"Bestway Concrete & Aggregates"},"validFrom":"2017-02-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"0504614","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0504614|0097925|2012-06-21|0117981|2017-02-27|22471"}}],"coverage":{"historyRecords":8,"edgeCount":18,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0504614","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"}}