{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"1102028","name":"Meyer Material Co-Dundee Pit","status":"Abandoned","status_date":"1985-08-28","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"IL","county":"Kane","nearest_town":"","operator_id":"L00240","operator_name":"Meyer Material Company","controller_id":"0193740","controller_name":"Amrize Ltd","district":"M4","office":"Duluth District","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":3,"registeredSources":20,"sourceRows":6},"relationships":{"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":"1102028","name":"Meyer Material Co-Dundee Pit"},"operator":{"type":"operator","id":"L00240","name":"Meyer Material Company"},"controller":{"type":"controller","id":"0193740","name":"Amrize Ltd"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00240","name":"Meyer Material Company"},"object":{"type":"mine","id":"1102028","name":"Meyer Material Co-Dundee 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":"1102028|L00240|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00200","name":"Meyer Material Acquisition Corp Et Al"},"object":{"type":"mine","id":"1102028","name":"Meyer Material Co-Dundee Pit"},"validFrom":"1950-01-01","validTo":"2011-07-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|M00200|1950-01-01|2011-07-11"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00200","name":"Meyer Material Acquisition Corp Et Al"},"object":{"type":"operator","id":"L00240","name":"Meyer Material Company"},"validFrom":"1950-01-01","validTo":"2011-07-11","current":false,"derived":true,"evidenceMineId":"1102028","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|L00240|1950-01-01|M00200|1950-01-01|107247"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"mine","id":"1102028","name":"Meyer Material Co-Dundee Pit"},"validFrom":"2011-07-12","validTo":"2015-07-09","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|M07336|2011-07-12|2015-07-09"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M07336","name":"Aggregate Industries PLC"},"object":{"type":"operator","id":"L00240","name":"Meyer Material Company"},"validFrom":"2011-07-12","validTo":"2015-07-09","current":false,"derived":true,"evidenceMineId":"1102028","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|L00240|1950-01-01|M07336|2011-07-12|141054"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"mine","id":"1102028","name":"Meyer Material Co-Dundee Pit"},"validFrom":"2015-07-10","validTo":"2025-06-22","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|0119681|2015-07-10|2025-06-22"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0119681","name":"Holcim Ltd"},"object":{"type":"operator","id":"L00240","name":"Meyer Material Company"},"validFrom":"2015-07-10","validTo":"2025-06-22","current":false,"derived":true,"evidenceMineId":"1102028","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|L00240|1950-01-01|0119681|2015-07-10|22925"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0193740","name":"Amrize Ltd"},"object":{"type":"mine","id":"1102028","name":"Meyer Material Co-Dundee Pit"},"validFrom":"2025-06-23","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|0193740|2025-06-23|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0193740","name":"Amrize Ltd"},"object":{"type":"operator","id":"L00240","name":"Meyer Material Company"},"validFrom":"2025-06-23","validTo":null,"current":true,"derived":true,"evidenceMineId":"1102028","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"1102028|L00240|1950-01-01|0193740|2025-06-23|41214"}}],"coverage":{"historyRecords":4,"edgeCount":9,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"1985-08-28","lastDate":"1985-08-28","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":4,"firstDate":"1950-01-01","lastDate":"1950-01-01","metrics":{"recentRows":0,"currentOperatorTenures":4,"completedOperatorTenures":0},"periods":{},"recentRecords":[]},{"id":"msha-mines","name":"Mines","domains":["identity","production","logistics"],"products":["mine identity","status","commodity","location","operator and controller"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{},"recentRecords":[]}],"safety":{"href":"/api/v1/mines/1102028/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/1102028/silica","description":"Dedicated silica records, measurements, sample status and trends. Defaults to the snapshot year; use year=all for history."},"externalContext":{"eia":null,"title30":{"snapshot":{"chapterCount":6,"featuredSectionCount":100,"latestAmendedOn":"2026-08-14","latestIssueDate":"2026-08-14","partCount":206,"sectionCount":5954,"upToDateAsOf":"2026-08-19"},"regulations":[],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"1102028","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}