{"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":"2901327","name":"Little Sapello Pit"},"operator":{"type":"operator","id":"0077343","name":"Sangre de Cristo"},"controller":{"type":"controller","id":"0064969","name":"Francisco L.  Melendez; Francisco M.  Melendez"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02893","name":"Robert  Gerhardt"},"object":{"type":"mine","id":"2901327","name":"Little Sapello Pit"},"validFrom":"1978-03-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901327|M02893|1978-03-09|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03603","name":"Sierra Transit Mix Inc"},"object":{"type":"mine","id":"2901327","name":"Little Sapello Pit"},"validFrom":"1979-09-01","validTo":"2007-05-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901327|L03603|1979-09-01|2007-05-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02893","name":"Robert  Gerhardt"},"object":{"type":"operator","id":"L03603","name":"Sierra Transit Mix Inc"},"validFrom":"1979-09-01","validTo":"2007-05-20","current":false,"derived":true,"evidenceMineId":"2901327","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901327|L03603|1979-09-01|M02893|1978-03-09|127270"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0064969","name":"Francisco L.  Melendez et al"},"object":{"type":"mine","id":"2901327","name":"Little Sapello Pit"},"validFrom":"2006-06-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901327|0064969|2006-06-06|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0077343","name":"Sangre de Cristo"},"object":{"type":"mine","id":"2901327","name":"Little Sapello Pit"},"validFrom":"2007-05-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901327|0077343|2007-05-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0064969","name":"Francisco L.  Melendez et al"},"object":{"type":"operator","id":"0077343","name":"Sangre de Cristo"},"validFrom":"2007-05-21","validTo":null,"current":true,"derived":true,"evidenceMineId":"2901327","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901327|0077343|2007-05-21|0064969|2006-06-06|8962"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0064969","name":"Francisco M.  Melendez et al"},"object":{"type":"operator","id":"0077343","name":"Sangre de Cristo"},"validFrom":"2007-05-21","validTo":null,"current":true,"derived":true,"evidenceMineId":"2901327","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2901327|0077343|2007-05-21|0064969|2006-06-06|8963"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2901327","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"}}