{"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":"0102852","name":"Shorter Plant"},"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":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"0102852","name":"Shorter Plant"},"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":"0102852|M00174|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11918","name":"Ray P  Lambert Jr et al"},"object":{"type":"mine","id":"0102852","name":"Shorter Plant"},"validFrom":"1986-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|M11918|1986-07-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11480","name":"Lambert Sand & Gravel Company Inc"},"object":{"type":"mine","id":"0102852","name":"Shorter Plant"},"validFrom":"1990-02-01","validTo":"1995-10-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|L11480|1990-02-01|1995-10-17"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11918","name":"Ray P  Lambert Jr et al"},"object":{"type":"operator","id":"L11480","name":"Lambert Sand & Gravel Company Inc"},"validFrom":"1990-02-01","validTo":"1995-10-17","current":false,"derived":true,"evidenceMineId":"0102852","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|L11480|1990-02-01|M11918|1986-07-01|152680"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11918","name":"Harry E  Lambert et al"},"object":{"type":"operator","id":"L11480","name":"Lambert Sand & Gravel Company Inc"},"validFrom":"1990-02-01","validTo":"1995-10-17","current":false,"derived":true,"evidenceMineId":"0102852","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|L11480|1990-02-01|M11918|1986-07-01|152681"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"object":{"type":"mine","id":"0102852","name":"Shorter Plant"},"validFrom":"1995-10-18","validTo":"2002-09-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|L00208|1995-10-18|2002-09-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"validFrom":"1995-10-18","validTo":"2002-09-08","current":false,"derived":true,"evidenceMineId":"0102852","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|L00208|1995-10-18|M00174|1950-01-01|105597"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16197","name":"Martin Marietta Materials, Inc."},"object":{"type":"mine","id":"0102852","name":"Shorter Plant"},"validFrom":"2002-09-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|L16197|2002-09-09|"}},{"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":"2002-09-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"0102852","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0102852|L16197|2002-09-09|M00174|1950-01-01|105598"}}],"coverage":{"historyRecords":4,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0102852","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"}}