{"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":"0504922","name":"City of Greeley Gravel Pit"},"operator":{"type":"operator","id":"0095706","name":"Miller-HFI, LLC"},"controller":{"type":"controller","id":"0080655","name":"MTFE Holdings; HFI LLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"0504922","name":"City of Greeley Gravel Pit"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|M00174|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0095706","name":"Miller-HFI LLC"},"object":{"type":"mine","id":"0504922","name":"City of Greeley Gravel Pit"},"validFrom":"2008-10-13","validTo":"2016-03-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|0095706|2008-10-13|2016-03-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0080655","name":"HFI LLC et al"},"object":{"type":"mine","id":"0504922","name":"City of Greeley Gravel Pit"},"validFrom":"2008-10-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|0080655|2008-10-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0080655","name":"HFI LLC et al"},"object":{"type":"operator","id":"0095706","name":"Miller-HFI LLC"},"validFrom":"2008-10-13","validTo":"2016-03-17","current":false,"derived":true,"evidenceMineId":"0504922","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|0095706|2008-10-13|0080655|2008-10-13|12721"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0080655","name":"MTFE Holdings et al"},"object":{"type":"operator","id":"0095706","name":"Miller-HFI LLC"},"validFrom":"2008-10-13","validTo":"2016-03-17","current":false,"derived":true,"evidenceMineId":"0504922","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|0095706|2008-10-13|0080655|2008-10-13|12722"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16197","name":"Martin Marietta Materials Inc."},"object":{"type":"mine","id":"0504922","name":"City of Greeley Gravel Pit"},"validFrom":"2016-03-18","validTo":"2016-07-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|L16197|2016-03-18|2016-07-10"}},{"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":"2016-03-18","validTo":"2016-07-10","current":false,"derived":true,"evidenceMineId":"0504922","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|L16197|2016-03-18|M00174|1950-01-01|105672"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0095706","name":"Miller-HFI, LLC"},"object":{"type":"mine","id":"0504922","name":"City of Greeley Gravel Pit"},"validFrom":"2016-07-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|0095706|2016-07-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0080655","name":"HFI LLC et al"},"object":{"type":"operator","id":"0095706","name":"Miller-HFI, LLC"},"validFrom":"2016-07-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"0504922","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|0095706|2016-07-11|0080655|2008-10-13|12723"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0080655","name":"MTFE Holdings et al"},"object":{"type":"operator","id":"0095706","name":"Miller-HFI, LLC"},"validFrom":"2016-07-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"0504922","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"0504922|0095706|2016-07-11|0080655|2008-10-13|12724"}}],"coverage":{"historyRecords":5,"edgeCount":10,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"0504922","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"}}