{"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":"1601352","name":"Martin Marietta Materials Inc. Plant #11"},"operator":{"type":"operator","id":"L16197","name":"Martin Marietta Materials, Inc."},"controller":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"1601352","name":"Martin Marietta Materials Inc. Plant #11"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|M00174|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09944","name":"Meridian Aggregates Company LP"},"object":{"type":"mine","id":"1601352","name":"Martin Marietta Materials Inc. Plant #11"},"validFrom":"1991-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|M09944|1991-03-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L13605","name":"Meridian Aggregates Company"},"object":{"type":"mine","id":"1601352","name":"Martin Marietta Materials Inc. Plant #11"},"validFrom":"1999-06-01","validTo":"2001-04-02","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|L13605|1999-06-01|2001-04-02"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09944","name":"Meridian Aggregates Company LP"},"object":{"type":"operator","id":"L13605","name":"Meridian Aggregates Company"},"validFrom":"1999-06-01","validTo":"2001-04-02","current":false,"derived":true,"evidenceMineId":"1601352","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|L13605|1999-06-01|M09944|1991-03-01|147982"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L18213","name":"Meridian Aggregates Company Lp"},"object":{"type":"mine","id":"1601352","name":"Martin Marietta Materials Inc. Plant #11"},"validFrom":"2001-04-03","validTo":"2001-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|L18213|2001-04-03|2001-04-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"1601352","name":"Martin Marietta Materials Inc. Plant #11"},"validFrom":"2001-04-03","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|M00174|2001-04-03|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L18213","name":"Meridian Aggregates Company Lp"},"validFrom":"2001-04-03","validTo":"2001-04-30","current":false,"derived":true,"evidenceMineId":"1601352","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|L18213|2001-04-03|M00174|2001-04-03|106421"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16197","name":"Martin Marietta Materials, Inc."},"object":{"type":"mine","id":"1601352","name":"Martin Marietta Materials Inc. Plant #11"},"validFrom":"2001-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|L16197|2001-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L16197","name":"Martin Marietta Materials, Inc."},"validFrom":"2001-05-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"1601352","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"1601352|L16197|2001-05-01|M00174|1950-01-01|105994"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1601352","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"}}