{"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":"5100251","name":"638 TPH Extec Portable Crusher"},"operator":{"type":"operator","id":"0077063","name":"SAN Construction LLC"},"controller":{"type":"controller","id":"0064749","name":"Sanford  Ota"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0049729","name":"Kajima International Inc"},"object":{"type":"mine","id":"5100251","name":"638 TPH Extec Portable Crusher"},"validFrom":"2005-04-14","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5100251|0049729|2005-04-14|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0059644","name":"Hawaiian Dredging Construction Company"},"object":{"type":"mine","id":"5100251","name":"638 TPH Extec Portable Crusher"},"validFrom":"2005-04-15","validTo":"2006-10-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5100251|0059644|2005-04-15|2006-10-29"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0049729","name":"Kajima International Inc"},"object":{"type":"operator","id":"0059644","name":"Hawaiian Dredging Construction Company"},"validFrom":"2005-04-15","validTo":"2006-10-29","current":false,"derived":true,"evidenceMineId":"5100251","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5100251|0059644|2005-04-15|0049729|2005-04-14|6231"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0077063","name":"SAN Construction LLC"},"object":{"type":"mine","id":"5100251","name":"638 TPH Extec Portable Crusher"},"validFrom":"2006-10-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5100251|0077063|2006-10-30|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0064749","name":"Sanford  Ota et al"},"object":{"type":"mine","id":"5100251","name":"638 TPH Extec Portable Crusher"},"validFrom":"2006-10-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5100251|0064749|2006-10-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0064749","name":"Sanford  Ota et al"},"object":{"type":"operator","id":"0077063","name":"SAN Construction LLC"},"validFrom":"2006-10-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"5100251","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5100251|0077063|2006-10-30|0064749|2006-10-30|8879"}}],"coverage":{"historyRecords":2,"edgeCount":6,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"5100251","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"}}