{"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":"4300064","name":"WALLINGFORD QUARRY"},"operator":{"type":"operator","id":"L14316","name":"TROY MINERALS"},"controller":{"type":"controller","id":"0195282","name":"Stephen M  Chmielewski"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00878","name":"White Pigment Corp"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"1950-01-01","validTo":"1980-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L00878|1950-01-01|1980-09-21"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00129","name":"Cyprus Mines Corp"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"1950-01-01","validTo":"1980-09-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|M00129|1950-01-01|1980-09-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00129","name":"Cyprus Mines Corp"},"object":{"type":"operator","id":"L00878","name":"White Pigment Corp"},"validFrom":"1950-01-01","validTo":"1980-09-21","current":false,"derived":true,"evidenceMineId":"4300064","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L00878|1950-01-01|M00129|1950-01-01|104841"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06617","name":"Dennis R  Demers"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"1950-01-01","validTo":"2017-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|M06617|1950-01-01|2017-04-30"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04526","name":"White Pigment Corp"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"1980-09-22","validTo":"1985-06-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L04526|1980-09-22|1985-06-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M05951","name":"Cyprus Minerals Corp & Pluess-Staufer Industries"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"1980-09-22","validTo":"1987-09-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|M05951|1980-09-22|1987-09-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M05951","name":"Cyprus Minerals Corp & Pluess-Staufer Industries"},"object":{"type":"operator","id":"L04526","name":"White Pigment Corp"},"validFrom":"1980-09-22","validTo":"1985-06-25","current":false,"derived":true,"evidenceMineId":"4300064","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L04526|1980-09-22|M05951|1980-09-22|135828"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08318","name":"Shelburne Limestone Corp"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"1985-06-26","validTo":"2015-01-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L08318|1985-06-26|2015-01-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06617","name":"Dennis R  Demers"},"object":{"type":"operator","id":"L08318","name":"Shelburne Limestone Corp"},"validFrom":"1985-06-26","validTo":"2015-01-04","current":false,"derived":true,"evidenceMineId":"4300064","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L08318|1985-06-26|M06617|1950-01-01|138873"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M10935","name":"Mike  Chmielewski"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"1995-03-01","validTo":"2025-06-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|M10935|1995-03-01|2025-06-29"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14316","name":"Troy Minerals"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"2015-01-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L14316|2015-01-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M10935","name":"Mike  Chmielewski"},"object":{"type":"operator","id":"L14316","name":"Troy Minerals"},"validFrom":"2015-01-05","validTo":"2025-06-29","current":false,"derived":true,"evidenceMineId":"4300064","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L14316|2015-01-05|M10935|1995-03-01|150291"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0133861","name":"Trampas  Demers"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"2017-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|0133861|2017-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0133861","name":"Trampas  Demers"},"object":{"type":"operator","id":"L08318","name":"Shelburne Limestone Corp"},"validFrom":"2017-05-01","validTo":"2015-01-04","current":false,"derived":true,"evidenceMineId":"4300064","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L08318|1985-06-26|0133861|2017-05-01|26960"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0195282","name":"Stephen M  Chmielewski"},"object":{"type":"mine","id":"4300064","name":"WALLINGFORD QUARRY"},"validFrom":"2025-06-30","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|0195282|2025-06-30|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0195282","name":"Stephen M  Chmielewski"},"object":{"type":"operator","id":"L14316","name":"Troy Minerals"},"validFrom":"2025-06-30","validTo":null,"current":true,"derived":true,"evidenceMineId":"4300064","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4300064|L14316|2015-01-05|0195282|2025-06-30|41698"}}],"coverage":{"historyRecords":6,"edgeCount":16,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4300064","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"}}