{"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":"2301765","name":"Plant #3"},"operator":{"type":"operator","id":"L30752","name":"Barrett Materials Inc"},"controller":{"type":"controller","id":"0191341","name":"Benjamin J  Barrett"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02658","name":"William  Staggenborg"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"1950-01-01","validTo":"1981-08-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|M02658|1950-01-01|1981-08-30"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03312","name":"Big Spring Quarries"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"1979-01-01","validTo":"1981-08-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|L03312|1979-01-01|1981-08-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02658","name":"William  Staggenborg"},"object":{"type":"operator","id":"L03312","name":"Big Spring Quarries"},"validFrom":"1979-01-01","validTo":"1981-08-30","current":false,"derived":true,"evidenceMineId":"2301765","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|L03312|1979-01-01|M02658|1950-01-01|126502"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02745","name":"Mertens Construction Company Inc"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"1981-05-26","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|M02745|1981-05-26|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05216","name":"Mid-Missouri Limestone, Inc"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"1981-08-31","validTo":"2018-01-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|L05216|1981-08-31|2018-01-25"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02745","name":"Mertens Construction Company Inc"},"object":{"type":"operator","id":"L05216","name":"Mid-Missouri Limestone, Inc"},"validFrom":"1981-08-31","validTo":"2018-01-25","current":false,"derived":true,"evidenceMineId":"2301765","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|L05216|1981-08-31|M02745|1981-05-26|126807"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M30752","name":"James L  Barrett"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"1990-03-01","validTo":"2024-11-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|M30752|1990-03-01|2024-11-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01573","name":"Con-Agg Llc"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"2001-12-28","validTo":"2010-09-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|M01573|2001-12-28|2010-09-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02046","name":"Summit Materials LLC"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"2010-09-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|M02046|2010-09-15|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051041","name":"Con-Agg Companies, LLC"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"2018-01-26","validTo":"2020-03-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|0051041|2018-01-26|2020-03-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01573","name":"Con-Agg Llc"},"object":{"type":"operator","id":"0051041","name":"Con-Agg Companies, LLC"},"validFrom":"2018-01-26","validTo":"2010-09-14","current":false,"derived":true,"evidenceMineId":"2301765","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|0051041|2018-01-26|M01573|2001-12-28|119364"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02046","name":"Summit Materials LLC"},"object":{"type":"operator","id":"0051041","name":"Con-Agg Companies, LLC"},"validFrom":"2018-01-26","validTo":"2020-03-30","current":false,"derived":true,"evidenceMineId":"2301765","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|0051041|2018-01-26|M02046|2010-09-15|122841"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L30752","name":"Barrett Materials Inc"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"2020-03-31","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|L30752|2020-03-31|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M30752","name":"James L  Barrett"},"object":{"type":"operator","id":"L30752","name":"Barrett Materials Inc"},"validFrom":"2020-03-31","validTo":"2024-11-09","current":false,"derived":true,"evidenceMineId":"2301765","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|L30752|2020-03-31|M30752|1990-03-01|158961"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0191341","name":"Benjamin J  Barrett"},"object":{"type":"mine","id":"2301765","name":"Plant #3"},"validFrom":"2024-11-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|0191341|2024-11-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0191341","name":"Benjamin J  Barrett"},"object":{"type":"operator","id":"L30752","name":"Barrett Materials Inc"},"validFrom":"2024-11-10","validTo":null,"current":true,"derived":true,"evidenceMineId":"2301765","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"2301765|L30752|2020-03-31|0191341|2024-11-10|40722"}}],"coverage":{"historyRecords":6,"edgeCount":16,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"2301765","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"}}