{"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":"1800693","name":"Hancock Quarry"},"operator":{"type":"operator","id":"0113025","name":"Bluegrass Materials Company, LLC"},"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":"M00085","name":"H B Mellott Estate Inc"},"object":{"type":"mine","id":"1800693","name":"Hancock Quarry"},"validFrom":"1950-01-01","validTo":"2022-04-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|M00085|1950-01-01|2022-04-04"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00045","name":"H.B. Mellott Estate Inc"},"object":{"type":"mine","id":"1800693","name":"Hancock Quarry"},"validFrom":"1982-11-01","validTo":"2014-02-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|L00045|1982-11-01|2014-02-12"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00085","name":"H B Mellott Estate Inc"},"object":{"type":"operator","id":"L00045","name":"H.B. Mellott Estate Inc"},"validFrom":"1982-11-01","validTo":"2014-02-12","current":false,"derived":true,"evidenceMineId":"1800693","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|L00045|1982-11-01|M00085|1950-01-01|103835"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0095673","name":"Panadero Aggregates Holdings, LLC"},"object":{"type":"mine","id":"1800693","name":"Hancock Quarry"},"validFrom":"2010-08-26","validTo":"2018-04-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|0095673|2010-08-26|2018-04-26"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0113025","name":"Bluegrass Materials Company, LLC"},"object":{"type":"mine","id":"1800693","name":"Hancock Quarry"},"validFrom":"2014-02-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|0113025|2014-02-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0095673","name":"Panadero Aggregates Holdings, LLC"},"object":{"type":"operator","id":"0113025","name":"Bluegrass Materials Company, LLC"},"validFrom":"2014-02-13","validTo":"2018-04-26","current":false,"derived":true,"evidenceMineId":"1800693","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|0113025|2014-02-13|0095673|2010-08-26|15772"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"1800693","name":"Hancock Quarry"},"validFrom":"2018-04-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|M00174|2018-04-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"0113025","name":"Bluegrass Materials Company, LLC"},"validFrom":"2018-04-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"1800693","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|0113025|2014-02-13|M00174|2018-04-27|106527"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0168101","name":"Jonathan  Schilowitz"},"object":{"type":"mine","id":"1800693","name":"Hancock Quarry"},"validFrom":"2022-04-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|0168101|2022-04-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0168101","name":"Jonathan  Schilowitz"},"object":{"type":"operator","id":"L00045","name":"H.B. Mellott Estate Inc"},"validFrom":"2022-04-05","validTo":"2014-02-12","current":false,"derived":true,"evidenceMineId":"1800693","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1800693|L00045|1982-11-01|0168101|2022-04-05|35456"}}],"coverage":{"historyRecords":4,"edgeCount":10,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"1800693","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"}}