{"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":"0504415","name":"Arcosa Boulder Plant #1604"},"operator":{"type":"operator","id":"0134299","name":"ARCOSA LWB, LLC"},"controller":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00344","name":"Texas Industries Inc"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|M00344|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L40134","name":"Western Aggregates"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"1989-12-01","validTo":"1997-11-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|L40134|1989-12-01|1997-11-24"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04742","name":"Inco Ltd"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"1989-12-01","validTo":"1997-11-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|M04742|1989-12-01|1997-11-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04742","name":"Inco Ltd"},"object":{"type":"operator","id":"L40134","name":"Western Aggregates"},"validFrom":"1989-12-01","validTo":"1997-11-24","current":false,"derived":true,"evidenceMineId":"0504415","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|L40134|1989-12-01|M04742|1989-12-01|132667"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00418","name":"Texas Industries"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"1997-11-25","validTo":"2005-03-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|L00418|1997-11-25|2005-03-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00344","name":"Texas Industries Inc"},"object":{"type":"operator","id":"L00418","name":"Texas Industries"},"validFrom":"1997-11-25","validTo":"2005-03-14","current":false,"derived":true,"evidenceMineId":"0504415","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|L00418|1997-11-25|M00344|1950-01-01|109633"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00344","name":"Texas Industries Inc"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"2004-12-01","validTo":"2014-07-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|M00344|2004-12-01|2014-07-01"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0055718","name":"TXI Operations LP"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"2005-03-15","validTo":"2013-03-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|0055718|2005-03-15|2013-03-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00344","name":"Texas Industries Inc"},"object":{"type":"operator","id":"0055718","name":"TXI Operations LP"},"validFrom":"2005-03-15","validTo":"2013-03-22","current":false,"derived":true,"evidenceMineId":"0504415","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|0055718|2005-03-15|M00344|2004-12-01|109716"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0134299","name":"ARCOSA LWB, LLC"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"2013-03-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|0134299|2013-03-23|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09571","name":"Trinity Industries Inc"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"2013-03-23","validTo":"2018-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|M09571|2013-03-23|2018-10-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09571","name":"Trinity Industries Inc"},"object":{"type":"operator","id":"0134299","name":"ARCOSA LWB, LLC"},"validFrom":"2013-03-23","validTo":"2018-10-31","current":false,"derived":true,"evidenceMineId":"0504415","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|0134299|2013-03-23|M09571|2013-03-23|146775"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"2014-07-02","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|M00174|2014-07-02|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"0055718","name":"TXI Operations LP"},"validFrom":"2014-07-02","validTo":"2013-03-22","current":false,"derived":true,"evidenceMineId":"0504415","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|0055718|2005-03-15|M00174|2014-07-02|106506"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"mine","id":"0504415","name":"Arcosa Boulder Plant #1604"},"validFrom":"2018-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|0144281|2018-11-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"operator","id":"0134299","name":"ARCOSA LWB, LLC"},"validFrom":"2018-11-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0504415","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"0504415|0134299|2013-03-23|0144281|2018-11-01|29238"}}],"coverage":{"historyRecords":6,"edgeCount":16,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0504415","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"}}