{"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":"4103178","name":"Pc #2"},"operator":{"type":"operator","id":"L10468","name":"Texas Sand & Gravel Company Inc"},"controller":{"type":"controller","id":"0126061","name":"Craig  Snell"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08157","name":"Roy P  Eastland III"},"object":{"type":"mine","id":"4103178","name":"Pc #2"},"validFrom":"1950-01-01","validTo":"2016-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|M08157|1950-01-01|2016-05-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08376","name":"Grant Construction Company"},"object":{"type":"mine","id":"4103178","name":"Pc #2"},"validFrom":"1983-06-01","validTo":"1986-02-19","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|L08376|1983-06-01|1986-02-19"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04140","name":"Tommy  Grant"},"object":{"type":"mine","id":"4103178","name":"Pc #2"},"validFrom":"1983-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|M04140|1983-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04140","name":"Tommy  Grant"},"object":{"type":"operator","id":"L08376","name":"Grant Construction Company"},"validFrom":"1983-06-01","validTo":"1986-02-19","current":false,"derived":true,"evidenceMineId":"4103178","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|L08376|1983-06-01|M04140|1983-06-01|131182"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08378","name":"Getman Sand & Gravel"},"object":{"type":"mine","id":"4103178","name":"Pc #2"},"validFrom":"1986-02-20","validTo":"1988-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|L08378|1986-02-20|1988-09-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06661","name":"Getman Bob"},"object":{"type":"mine","id":"4103178","name":"Pc #2"},"validFrom":"1986-02-20","validTo":"1988-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|M06661|1986-02-20|1988-09-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06661","name":"Getman Bob"},"object":{"type":"operator","id":"L08378","name":"Getman Sand & Gravel"},"validFrom":"1986-02-20","validTo":"1988-09-21","current":false,"derived":true,"evidenceMineId":"4103178","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|L08378|1986-02-20|M06661|1986-02-20|139024"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10468","name":"Texas Sand & Gravel Company Inc"},"object":{"type":"mine","id":"4103178","name":"Pc #2"},"validFrom":"1988-09-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|L10468|1988-09-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08157","name":"Roy P  Eastland III"},"object":{"type":"operator","id":"L10468","name":"Texas Sand & Gravel Company Inc"},"validFrom":"1988-09-22","validTo":"2016-05-31","current":false,"derived":true,"evidenceMineId":"4103178","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|L10468|1988-09-22|M08157|1950-01-01|142804"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0126061","name":"Craig  Snell"},"object":{"type":"mine","id":"4103178","name":"Pc #2"},"validFrom":"2016-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|0126061|2016-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0126061","name":"Craig  Snell"},"object":{"type":"operator","id":"L10468","name":"Texas Sand & Gravel Company Inc"},"validFrom":"2016-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4103178","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4103178|L10468|1988-09-22|0126061|2016-06-01|24443"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4103178","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"}}