{"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":"1301208","name":"Portable Plant #1"},"operator":{"type":"operator","id":"0169213","name":"Wright Materials Company"},"controller":{"type":"controller","id":"0153841","name":"Bill  Yohn; Laura  Yohn; Alex  Yohn"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00613","name":"La Harv Construction Company Inc"},"object":{"type":"mine","id":"1301208","name":"Portable Plant #1"},"validFrom":"1950-01-01","validTo":"2003-07-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|L00613|1950-01-01|2003-07-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00511","name":"Harvey E  Harms"},"object":{"type":"mine","id":"1301208","name":"Portable Plant #1"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|M00511|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00511","name":"Harvey E  Harms"},"object":{"type":"operator","id":"L00613","name":"La Harv Construction Company Inc"},"validFrom":"1950-01-01","validTo":"2003-07-01","current":false,"derived":true,"evidenceMineId":"1301208","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|L00613|1950-01-01|M00511|1950-01-01|111933"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09163","name":"William  Yohn"},"object":{"type":"mine","id":"1301208","name":"Portable Plant #1"},"validFrom":"1990-07-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|M09163|1990-07-09|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11890","name":"Wright Materials Company"},"object":{"type":"mine","id":"1301208","name":"Portable Plant #1"},"validFrom":"2003-07-02","validTo":"2020-03-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|L11890|2003-07-02|2020-03-29"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09163","name":"William  Yohn"},"object":{"type":"operator","id":"L11890","name":"Wright Materials Company"},"validFrom":"2003-07-02","validTo":"2020-03-29","current":false,"derived":true,"evidenceMineId":"1301208","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|L11890|2003-07-02|M09163|1990-07-09|145733"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0153841","name":"Laura  Yohn et al"},"object":{"type":"mine","id":"1301208","name":"Portable Plant #1"},"validFrom":"2020-02-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|0153841|2020-02-06|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0169213","name":"Wright Materials Company"},"object":{"type":"mine","id":"1301208","name":"Portable Plant #1"},"validFrom":"2020-03-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|0169213|2020-03-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0153841","name":"Laura  Yohn et al"},"object":{"type":"operator","id":"0169213","name":"Wright Materials Company"},"validFrom":"2020-03-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"1301208","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|0169213|2020-03-30|0153841|2020-02-06|31927"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0153841","name":"Alex  Yohn et al"},"object":{"type":"operator","id":"0169213","name":"Wright Materials Company"},"validFrom":"2020-03-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"1301208","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|0169213|2020-03-30|0153841|2020-02-06|31928"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0153841","name":"Bill  Yohn et al"},"object":{"type":"operator","id":"0169213","name":"Wright Materials Company"},"validFrom":"2020-03-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"1301208","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1301208|0169213|2020-03-30|0153841|2020-02-06|31929"}}],"coverage":{"historyRecords":5,"edgeCount":11,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1301208","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"}}