{"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":"4001405","name":"Jackson Sand Plant"},"operator":{"type":"operator","id":"0089444","name":"Delta Contracting Company LLC"},"controller":{"type":"controller","id":"0149161","name":"Alan  Dement"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00703","name":"Mc Dowell Enterprises"},"object":{"type":"mine","id":"4001405","name":"Jackson Sand Plant"},"validFrom":"1950-01-01","validTo":"1985-12-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|M00703|1950-01-01|1985-12-01"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02542","name":"Mc Dowell Materials Corp"},"object":{"type":"mine","id":"4001405","name":"Jackson Sand Plant"},"validFrom":"1979-01-01","validTo":"1984-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|L02542|1979-01-01|1984-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00703","name":"Mc Dowell Enterprises"},"object":{"type":"operator","id":"L02542","name":"Mc Dowell Materials Corp"},"validFrom":"1979-01-01","validTo":"1984-09-30","current":false,"derived":true,"evidenceMineId":"4001405","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|L02542|1979-01-01|M00703|1950-01-01|114247"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08242","name":"Dement Construction Company"},"object":{"type":"mine","id":"4001405","name":"Jackson Sand Plant"},"validFrom":"1984-10-01","validTo":"2007-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|L08242|1984-10-01|2007-03-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06559","name":"William D  Dement"},"object":{"type":"mine","id":"4001405","name":"Jackson Sand Plant"},"validFrom":"1984-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|M06559|1984-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06559","name":"William D  Dement"},"object":{"type":"operator","id":"L08242","name":"Dement Construction Company"},"validFrom":"1984-10-01","validTo":"2007-03-31","current":false,"derived":true,"evidenceMineId":"4001405","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|L08242|1984-10-01|M06559|1984-10-01|138779"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0089444","name":"Delta Contracting Company LLC"},"object":{"type":"mine","id":"4001405","name":"Jackson Sand Plant"},"validFrom":"2007-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|0089444|2007-04-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0075111","name":"W G  Dement Jr"},"object":{"type":"mine","id":"4001405","name":"Jackson Sand Plant"},"validFrom":"2007-04-01","validTo":"2018-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|0075111|2007-04-01|2018-08-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0075111","name":"W G  Dement Jr"},"object":{"type":"operator","id":"0089444","name":"Delta Contracting Company LLC"},"validFrom":"2007-04-01","validTo":"2018-08-31","current":false,"derived":true,"evidenceMineId":"4001405","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|0089444|2007-04-01|0075111|2007-04-01|11743"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0149161","name":"Alan  Dement"},"object":{"type":"mine","id":"4001405","name":"Jackson Sand Plant"},"validFrom":"2018-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|0149161|2018-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0149161","name":"Alan  Dement"},"object":{"type":"operator","id":"0089444","name":"Delta Contracting Company LLC"},"validFrom":"2018-09-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4001405","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4001405|0089444|2007-04-01|0149161|2018-09-01|30510"}}],"coverage":{"historyRecords":4,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4001405","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"}}