{"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":"2026-10-17T05:35:58.500035+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":"3400860","name":"Morgans Rock & Gravel"},"operator":{"type":"operator","id":"L12257","name":"Morgan Rock & Gravel"},"controller":{"type":"controller","id":"M09417","name":"Morgan Ernest & Donna"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03446","name":"Earthmovers General Contractors"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1950-01-01","validTo":"1979-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L03446|1950-01-01|1979-07-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02762","name":"Earthmovers General Contractors"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1950-01-01","validTo":"1979-07-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|M02762|1950-01-01|1979-07-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02762","name":"Earthmovers General Contractors"},"object":{"type":"operator","id":"L03446","name":"Earthmovers General Contractors"},"validFrom":"1950-01-01","validTo":"1979-07-31","current":false,"derived":true,"evidenceMineId":"3400860","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L03446|1950-01-01|M02762|1950-01-01|126844"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03447","name":"El Chaparral Inc"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1979-08-01","validTo":"1985-04-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L03447|1979-08-01|1985-04-02"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02763","name":"Lewis W H"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1979-08-01","validTo":"1985-04-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|M02763|1979-08-01|1985-04-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02763","name":"Lewis W H"},"object":{"type":"operator","id":"L03447","name":"El Chaparral Inc"},"validFrom":"1979-08-01","validTo":"1985-04-02","current":false,"derived":true,"evidenceMineId":"3400860","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L03447|1979-08-01|M02763|1979-08-01|126845"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L07963","name":"Blue Chip Inc"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1985-04-03","validTo":"1991-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L07963|1985-04-03|1991-06-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06329","name":"White Charles B"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1985-04-03","validTo":"1991-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|M06329|1985-04-03|1991-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06329","name":"White Charles B"},"object":{"type":"operator","id":"L07963","name":"Blue Chip Inc"},"validFrom":"1985-04-03","validTo":"1991-06-30","current":false,"derived":true,"evidenceMineId":"3400860","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L07963|1985-04-03|M06329|1985-04-03|138302"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L12257","name":"Morgan Rock & Gravel"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1991-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L12257|1991-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09417","name":"Morgan Ernest & Donna"},"object":{"type":"mine","id":"3400860","name":"Morgans Rock & Gravel"},"validFrom":"1991-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|M09417|1991-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09417","name":"Morgan Ernest & Donna"},"object":{"type":"operator","id":"L12257","name":"Morgan Rock & Gravel"},"validFrom":"1991-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"3400860","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"3400860|L12257|1991-07-01|M09417|1991-07-01|146371"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3400860","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}