{"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":"4201935","name":"Perry Pit"},"operator":{"type":"operator","id":"L00870","name":"Geneva Rock Products Inc"},"controller":{"type":"controller","id":"M04084","name":"CCI  (Clyde Companies Inc)"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04084","name":"CCI  (Clyde Companies Inc)"},"object":{"type":"mine","id":"4201935","name":"Perry Pit"},"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":"4201935|M04084|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08862","name":"Call Gravel Company"},"object":{"type":"mine","id":"4201935","name":"Perry Pit"},"validFrom":"1985-04-01","validTo":"1986-04-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|L08862|1985-04-01|1986-04-29"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07009","name":"Robert  Call"},"object":{"type":"mine","id":"4201935","name":"Perry Pit"},"validFrom":"1985-04-01","validTo":"1986-04-29","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|M07009|1985-04-01|1986-04-29"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07009","name":"Robert  Call"},"object":{"type":"operator","id":"L08862","name":"Call Gravel Company"},"validFrom":"1985-04-01","validTo":"1986-04-29","current":false,"derived":true,"evidenceMineId":"4201935","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|L08862|1985-04-01|M07009|1985-04-01|139884"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L08863","name":"United Sand & Gravel Inc"},"object":{"type":"mine","id":"4201935","name":"Perry Pit"},"validFrom":"1986-04-30","validTo":"1999-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|L08863|1986-04-30|1999-02-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07010","name":"Howard H  Giles et al"},"object":{"type":"mine","id":"4201935","name":"Perry Pit"},"validFrom":"1986-04-30","validTo":"1999-02-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|M07010|1986-04-30|1999-02-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07010","name":"Howard H  Giles et al"},"object":{"type":"operator","id":"L08863","name":"United Sand & Gravel Inc"},"validFrom":"1986-04-30","validTo":"1999-02-28","current":false,"derived":true,"evidenceMineId":"4201935","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|L08863|1986-04-30|M07010|1986-04-30|139885"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00870","name":"Geneva Rock Products Inc"},"object":{"type":"mine","id":"4201935","name":"Perry Pit"},"validFrom":"1999-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|L00870|1999-03-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04084","name":"CCI  (Clyde Companies Inc)"},"object":{"type":"operator","id":"L00870","name":"Geneva Rock Products Inc"},"validFrom":"1999-03-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4201935","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4201935|L00870|1999-03-01|M04084|1950-01-01|130943"}}],"coverage":{"historyRecords":3,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4201935","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"}}