{"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":"4500056","name":"BIG BEAR QUARRY"},"operator":{"type":"operator","id":"L16343","name":"Rominco Llc"},"controller":{"type":"controller","id":"M12501","name":"Prime Cascade Investments Llc; Barclays North Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03870","name":"Ted A Schaneltzer"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1950-01-01","validTo":"1980-04-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L03870|1950-01-01|1980-04-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03098","name":"Schaneltzer Ted A"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1950-01-01","validTo":"1980-04-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|M03098|1950-01-01|1980-04-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03098","name":"Schaneltzer Ted A"},"object":{"type":"operator","id":"L03870","name":"Ted A Schaneltzer"},"validFrom":"1950-01-01","validTo":"1980-04-08","current":false,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L03870|1950-01-01|M03098|1950-01-01|127882"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03099","name":"Jerry (GR)  Severson"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"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":"4500056|M03099|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L03871","name":"G R Severson Trucking Company"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1980-04-09","validTo":"1980-06-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L03871|1980-04-09|1980-06-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03099","name":"Jerry (GR)  Severson"},"object":{"type":"operator","id":"L03871","name":"G R Severson Trucking Company"},"validFrom":"1980-04-09","validTo":"1980-06-11","current":false,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L03871|1980-04-09|M03099|1950-01-01|127883"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05085","name":"William Joplin"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1980-06-12","validTo":"1981-01-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L05085|1980-06-12|1981-01-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04103","name":"William  Joplin"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1980-06-12","validTo":"1981-01-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|M04103|1980-06-12|1981-01-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04103","name":"William  Joplin"},"object":{"type":"operator","id":"L05085","name":"William Joplin"},"validFrom":"1980-06-12","validTo":"1981-01-26","current":false,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L05085|1980-06-12|M04103|1980-06-12|131067"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L05087","name":"Miller Lime & Quarry Inc"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1981-01-27","validTo":"1988-11-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L05087|1981-01-27|1988-11-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04104","name":"Eugene A  Hos et al"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1981-01-27","validTo":"1988-11-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|M04104|1981-01-27|1988-11-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04104","name":"Eugene A  Hos et al"},"object":{"type":"operator","id":"L05087","name":"Miller Lime & Quarry Inc"},"validFrom":"1981-01-27","validTo":"1988-11-15","current":false,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L05087|1981-01-27|M04104|1981-01-27|131069"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L10538","name":"Miller Lime & Quarry"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1988-11-16","validTo":"1993-06-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L10538|1988-11-16|1993-06-16"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08208","name":"Leslie E  McCombs"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1988-11-16","validTo":"1993-06-16","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|M08208|1988-11-16|1993-06-16"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08208","name":"Leslie E  McCombs"},"object":{"type":"operator","id":"L10538","name":"Miller Lime & Quarry"},"validFrom":"1988-11-16","validTo":"1993-06-16","current":false,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L10538|1988-11-16|M08208|1988-11-16|142909"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13097","name":"Alpine Rockeries Inc"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1993-06-17","validTo":"1999-02-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L13097|1993-06-17|1999-02-10"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10011","name":"Patricia  Seals"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1993-06-17","validTo":"1999-02-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|M10011|1993-06-17|1999-02-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10011","name":"Patricia  Seals"},"object":{"type":"operator","id":"L13097","name":"Alpine Rockeries Inc"},"validFrom":"1993-06-17","validTo":"1999-02-10","current":false,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L13097|1993-06-17|M10011|1993-06-17|148159"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16343","name":"Rominco Llc"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1999-02-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L16343|1999-02-11|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12501","name":"Barclays North Inc"},"object":{"type":"mine","id":"4500056","name":"BIG BEAR QUARRY"},"validFrom":"1999-02-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|M12501|1999-02-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12501","name":"Barclays North Inc"},"object":{"type":"operator","id":"L16343","name":"Rominco Llc"},"validFrom":"1999-02-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L16343|1999-02-11|M12501|1999-02-11|153903"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12501","name":"Prime Cascade Investments Llc et al"},"object":{"type":"operator","id":"L16343","name":"Rominco Llc"},"validFrom":"1999-02-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"4500056","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4500056|L16343|1999-02-11|M12501|1999-02-11|153904"}}],"coverage":{"historyRecords":8,"edgeCount":22,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4500056","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"}}