{"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":"3000926","name":"Porter Road"},"operator":{"type":"operator","id":"L09535","name":"Malone Quarry"},"controller":{"type":"controller","id":"M00218","name":"Graymont Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04055","name":"Malone Concrete Products Company Inc"},"object":{"type":"mine","id":"3000926","name":"Porter Road"},"validFrom":"1950-01-01","validTo":"1979-08-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|L04055|1950-01-01|1979-08-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03252","name":"Perrigo Charles V"},"object":{"type":"mine","id":"3000926","name":"Porter Road"},"validFrom":"1950-01-01","validTo":"1979-08-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|M03252|1950-01-01|1979-08-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03252","name":"Perrigo Charles V"},"object":{"type":"operator","id":"L04055","name":"Malone Concrete Products Company Inc"},"validFrom":"1950-01-01","validTo":"1979-08-27","current":false,"derived":true,"evidenceMineId":"3000926","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|L04055|1950-01-01|M03252|1950-01-01|128613"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04056","name":"Malone Concrete Products Corp"},"object":{"type":"mine","id":"3000926","name":"Porter Road"},"validFrom":"1979-08-28","validTo":"1986-04-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|L04056|1979-08-28|1986-04-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03253","name":"Bicknell Brothers Inc & St Lawrence Transit"},"object":{"type":"mine","id":"3000926","name":"Porter Road"},"validFrom":"1979-08-28","validTo":"1986-04-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|M03253|1979-08-28|1986-04-14"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03253","name":"Bicknell Brothers Inc & St Lawrence Transit"},"object":{"type":"operator","id":"L04056","name":"Malone Concrete Products Corp"},"validFrom":"1979-08-28","validTo":"1986-04-14","current":false,"derived":true,"evidenceMineId":"3000926","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|L04056|1979-08-28|M03253|1979-08-28|128614"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00218","name":"Graymont Ltd"},"object":{"type":"mine","id":"3000926","name":"Porter Road"},"validFrom":"1984-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|M00218|1984-04-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09535","name":"Malone Quarry"},"object":{"type":"mine","id":"3000926","name":"Porter Road"},"validFrom":"1986-04-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|L09535|1986-04-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00218","name":"Graymont Ltd"},"object":{"type":"operator","id":"L09535","name":"Malone Quarry"},"validFrom":"1986-04-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"3000926","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"3000926|L09535|1986-04-15|M00218|1984-04-01|107569"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"3000926","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"}}