{"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":"4100076","name":"CHICO QUARRY"},"operator":{"type":"operator","id":"L17823","name":"Hanson Aggregates"},"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":"operator_operates_mine","subject":{"type":"operator","id":"L03745","name":"Trinity Metroplex Div-General Portland Inc"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1950-01-01","validTo":"1981-11-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L03745|1950-01-01|1981-11-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00506","name":"General Portland Inc"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1950-01-01","validTo":"1981-11-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|M00506|1950-01-01|1981-11-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00506","name":"General Portland Inc"},"object":{"type":"operator","id":"L03745","name":"Trinity Metroplex Div-General Portland Inc"},"validFrom":"1950-01-01","validTo":"1981-11-11","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L03745|1950-01-01|M00506|1950-01-01|111896"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"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":"4100076|M02063|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09304","name":"Lafarge Corp"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1981-11-12","validTo":"1989-08-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L09304|1981-11-12|1989-08-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M02063","name":"Lafarge S A"},"object":{"type":"operator","id":"L09304","name":"Lafarge Corp"},"validFrom":"1981-11-12","validTo":"1989-08-31","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L09304|1981-11-12|M02063|1950-01-01|123233"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M04321","name":"Pioneer International Ltd"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1984-08-20","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|M04321|1984-08-20|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1988-11-14","validTo":"2007-08-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|M00521|1988-11-14|2007-08-22"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11223","name":"Chico Crushed Stone Partnership"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1989-09-01","validTo":"1995-01-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L11223|1989-09-01|1995-01-31"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08689","name":"Lafarge Corp et al"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1989-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|M08689|1989-09-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08689","name":"Lafarge Corp et al"},"object":{"type":"operator","id":"L11223","name":"Chico Crushed Stone Partnership"},"validFrom":"1989-09-01","validTo":"1995-01-31","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L11223|1989-09-01|M08689|1989-09-01|143879"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08689","name":"Pioneer International Ltd  et al"},"object":{"type":"operator","id":"L11223","name":"Chico Crushed Stone Partnership"},"validFrom":"1989-09-01","validTo":"1995-01-31","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L11223|1989-09-01|M08689|1989-09-01|143880"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16401","name":"Pioneer South Central Inc"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"1995-02-01","validTo":"2000-08-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L16401|1995-02-01|2000-08-03"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M04321","name":"Pioneer International Ltd"},"object":{"type":"operator","id":"L16401","name":"Pioneer South Central Inc"},"validFrom":"1995-02-01","validTo":"2000-08-03","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L16401|1995-02-01|M04321|1984-08-20|131689"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17763","name":"Hanson Aggregates Central Inc"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"2000-08-04","validTo":"2004-05-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L17763|2000-08-04|2004-05-09"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"2000-08-04","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|M00521|2000-08-04|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L17763","name":"Hanson Aggregates Central Inc"},"validFrom":"2000-08-04","validTo":"2004-05-09","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L17763|2000-08-04|M00521|2000-08-04|112612"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17823","name":"Hanson Aggregates"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"2004-05-10","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L17823|2004-05-10|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00521","name":"Hanson PLC"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates"},"validFrom":"2004-05-10","validTo":"2007-08-22","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L17823|2004-05-10|M00521|1988-11-14|112389"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"2007-08-23","validTo":"2021-09-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|M00004|2007-08-23|2021-09-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates"},"validFrom":"2007-08-23","validTo":"2021-09-30","current":false,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L17823|2004-05-10|M00004|2007-08-23|100653"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"4100076","name":"CHICO QUARRY"},"validFrom":"2021-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|M00174|2021-10-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L17823","name":"Hanson Aggregates"},"validFrom":"2021-10-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"4100076","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4100076|L17823|2004-05-10|M00174|2021-10-01|106624"}}],"coverage":{"historyRecords":9,"edgeCount":23,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4100076","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"}}