{"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":"0301985","name":"SamSand LLC"},"operator":{"type":"operator","id":"0103805","name":"SamSand LLC"},"controller":{"type":"controller","id":"0118381","name":"Samuel M  Brockinton"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0102545","name":"Garland Sand and Gravel Corporation"},"object":{"type":"mine","id":"0301985","name":"SamSand LLC"},"validFrom":"2009-06-22","validTo":"2009-09-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0102545|2009-06-22|2009-09-03"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0086733","name":"Sue  Farrar Parham"},"object":{"type":"mine","id":"0301985","name":"SamSand LLC"},"validFrom":"2009-06-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0086733|2009-06-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0086733","name":"Sue  Farrar Parham"},"object":{"type":"operator","id":"0102545","name":"Garland Sand and Gravel Corporation"},"validFrom":"2009-06-22","validTo":"2009-09-03","current":false,"derived":true,"evidenceMineId":"0301985","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0102545|2009-06-22|0086733|2009-06-22|13956"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0103805","name":"SamSand LLC"},"object":{"type":"mine","id":"0301985","name":"SamSand LLC"},"validFrom":"2009-09-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0103805|2009-09-04|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0087833","name":"Chieftain Sand and Proppant LLC"},"object":{"type":"mine","id":"0301985","name":"SamSand LLC"},"validFrom":"2009-09-04","validTo":"2015-05-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0087833|2009-09-04|2015-05-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0087833","name":"Chieftain Sand and Proppant LLC"},"object":{"type":"operator","id":"0103805","name":"SamSand LLC"},"validFrom":"2009-09-04","validTo":"2015-05-11","current":false,"derived":true,"evidenceMineId":"0301985","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0103805|2009-09-04|0087833|2009-09-04|14122"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0118381","name":"Samuel M  Brockinton"},"object":{"type":"mine","id":"0301985","name":"SamSand LLC"},"validFrom":"2015-05-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0118381|2015-05-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0118381","name":"Samuel M  Brockinton"},"object":{"type":"operator","id":"0103805","name":"SamSand LLC"},"validFrom":"2015-05-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"0301985","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0301985|0103805|2009-09-04|0118381|2015-05-12|22630"}}],"coverage":{"historyRecords":3,"edgeCount":8,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0301985","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"}}