{"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":"2026-10-18T09:31:49.615908+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":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"operator":{"type":"operator","id":"0129036","name":"ARCOSA LWFP, LLC"},"controller":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00659","name":"Lightweight Processing Company"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1950-01-01","validTo":"1983-10-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L00659|1950-01-01|1983-10-05"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00542","name":"Vernon  Benfer"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1950-01-01","validTo":"1983-10-05","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|M00542|1950-01-01|1983-10-05"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00542","name":"Vernon  Benfer"},"object":{"type":"operator","id":"L00659","name":"Lightweight Processing Company"},"validFrom":"1950-01-01","validTo":"1983-10-05","current":false,"derived":true,"evidenceMineId":"0400555","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L00659|1950-01-01|M00542|1950-01-01|113028"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L06921","name":"Lightweight Processing Company"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1983-10-06","validTo":"1988-12-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L06921|1983-10-06|1988-12-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05517","name":"Joseph  Baird"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1983-10-06","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|M05517|1983-10-06|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05517","name":"Joseph  Baird"},"object":{"type":"operator","id":"L06921","name":"Lightweight Processing Company"},"validFrom":"1983-10-06","validTo":"1988-12-08","current":false,"derived":true,"evidenceMineId":"0400555","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L06921|1983-10-06|M05517|1983-10-06|134827"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10743","name":"Pacific Lightweight Products Company"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1988-12-09","validTo":"1996-01-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L10743|1988-12-09|1996-01-22"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1988-12-09","validTo":"1996-01-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|M02063|1988-12-09|1996-01-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"operator","id":"L10743","name":"Pacific Lightweight Products Company"},"validFrom":"1988-12-09","validTo":"1996-01-22","current":false,"derived":true,"evidenceMineId":"0400555","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L10743|1988-12-09|M02063|1988-12-09|123315"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14356","name":"Pacific Custom Materials Inc"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1996-01-23","validTo":"2013-03-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L14356|1996-01-23|2013-03-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00344","name":"Texas Industries Inc"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"1996-01-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|M00344|1996-01-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00344","name":"Texas Industries Inc"},"object":{"type":"operator","id":"L14356","name":"Pacific Custom Materials Inc"},"validFrom":"1996-01-23","validTo":"2013-03-27","current":false,"derived":true,"evidenceMineId":"0400555","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|L14356|1996-01-23|M00344|1996-01-23|109710"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0129036","name":"ARCOSA LWFP, LLC"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"2013-03-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|0129036|2013-03-28|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09571","name":"Trinity Industries Inc"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"2013-03-28","validTo":"2018-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|M09571|2013-03-28|2018-10-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09571","name":"Trinity Industries Inc"},"object":{"type":"operator","id":"0129036","name":"ARCOSA LWFP, LLC"},"validFrom":"2013-03-28","validTo":"2018-10-31","current":false,"derived":true,"evidenceMineId":"0400555","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|0129036|2013-03-28|M09571|2013-03-28|146777"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"mine","id":"0400555","name":"Arcosa Frazier Park Plant# 1603"},"validFrom":"2018-11-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|0144281|2018-11-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0144281","name":"Arcosa, Inc"},"object":{"type":"operator","id":"0129036","name":"ARCOSA LWFP, LLC"},"validFrom":"2018-11-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"0400555","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0400555|0129036|2013-03-28|0144281|2018-11-01|29237"}}],"coverage":{"historyRecords":6,"edgeCount":17,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0400555","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}