{"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":"2000885","name":"Davis Pit"},"operator":{"type":"operator","id":"L04516","name":"Carl Schlegel Inc"},"controller":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03102","name":"Whittum Gravel Company"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"1950-01-01","validTo":"1979-05-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L03102|1950-01-01|1979-05-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02501","name":"Whittum Gravel Company"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"1950-01-01","validTo":"1979-05-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|M02501|1950-01-01|1979-05-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02501","name":"Whittum Gravel Company"},"object":{"type":"operator","id":"L03102","name":"Whittum Gravel Company"},"validFrom":"1950-01-01","validTo":"1979-05-22","current":false,"derived":true,"evidenceMineId":"2000885","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L03102|1950-01-01|M02501|1950-01-01|125727"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03641","name":"David R  Schlegel"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"1950-01-01","validTo":"2013-12-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|M03641|1950-01-01|2013-12-30"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03103","name":"Contractors Sand & Gravel Inc"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"1979-05-23","validTo":"1988-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L03103|1979-05-23|1988-03-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02502","name":"Michael H  Davis"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"1979-05-23","validTo":"1988-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|M02502|1979-05-23|1988-03-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02502","name":"Michael H  Davis"},"object":{"type":"operator","id":"L03103","name":"Contractors Sand & Gravel Inc"},"validFrom":"1979-05-23","validTo":"1988-03-31","current":false,"derived":true,"evidenceMineId":"2000885","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L03103|1979-05-23|M02502|1979-05-23|125728"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04516","name":"Carl Schlegel Inc"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"1988-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L04516|1988-04-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03641","name":"David R  Schlegel"},"object":{"type":"operator","id":"L04516","name":"Carl Schlegel Inc"},"validFrom":"1988-04-01","validTo":"2013-12-30","current":false,"derived":true,"evidenceMineId":"2000885","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L04516|1988-04-01|M03641|1950-01-01|129556"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0120061","name":"Matt  Schlegel et al"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"2013-12-31","validTo":"2022-01-20","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|0120061|2013-12-31|2022-01-20"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0120061","name":"Matt  Schlegel et al"},"object":{"type":"operator","id":"L04516","name":"Carl Schlegel Inc"},"validFrom":"2013-12-31","validTo":"2022-01-20","current":false,"derived":true,"evidenceMineId":"2000885","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L04516|1988-04-01|0120061|2013-12-31|23398"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0120061","name":"Mark  Schlegel et al"},"object":{"type":"operator","id":"L04516","name":"Carl Schlegel Inc"},"validFrom":"2013-12-31","validTo":"2022-01-20","current":false,"derived":true,"evidenceMineId":"2000885","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L04516|1988-04-01|0120061|2013-12-31|23399"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"mine","id":"2000885","name":"Davis Pit"},"validFrom":"2022-01-21","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|M10266|2022-01-21|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10266","name":"Carmeuse Holding SA"},"object":{"type":"operator","id":"L04516","name":"Carl Schlegel Inc"},"validFrom":"2022-01-21","validTo":null,"current":true,"derived":true,"evidenceMineId":"2000885","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2000885|L04516|1988-04-01|M10266|2022-01-21|148840"}}],"coverage":{"historyRecords":6,"edgeCount":14,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2000885","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"}}