{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-17T06:17:15.228Z","identity":{"mine_id":"1200424","name":"LEHIGH PORTLAND CEMENT CO., BUFF","status":"Abandoned","status_date":"2000-04-19","mine_type":"Facility","coal_metal":"M","commodity":"Cement","state":"IN","county":"Lake","nearest_town":"","operator_id":"L00002","operator_name":"Lehigh Portland Cement Company","controller_id":"M00004","controller_name":"Heidelberg Materials AG","district":"M4","office":"Duluth District","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":5,"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":"2026-10-17T05:35:58.500035+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":"1200424","name":"LEHIGH PORTLAND CEMENT CO., BUFF"},"operator":{"type":"operator","id":"L00002","name":"Lehigh Portland Cement Company"},"controller":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"mine","id":"1200424","name":"LEHIGH PORTLAND CEMENT CO., BUFF"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200424|M00004|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00275","name":"United States Steel Corp"},"object":{"type":"mine","id":"1200424","name":"LEHIGH PORTLAND CEMENT CO., BUFF"},"validFrom":"1950-01-01","validTo":"1980-09-14","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200424|L00275|1950-01-01|1980-09-14"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00222","name":"USX Corp (United States Steel Corp)"},"object":{"type":"mine","id":"1200424","name":"LEHIGH PORTLAND CEMENT CO., BUFF"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200424|M00222|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00222","name":"USX Corp (United States Steel Corp)"},"object":{"type":"operator","id":"L00275","name":"United States Steel Corp"},"validFrom":"1950-01-01","validTo":"1980-09-14","current":false,"derived":true,"evidenceMineId":"1200424","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200424|L00275|1950-01-01|M00222|1950-01-01|107658"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00002","name":"Lehigh Portland Cement Company"},"object":{"type":"mine","id":"1200424","name":"LEHIGH PORTLAND CEMENT CO., BUFF"},"validFrom":"1980-09-15","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200424|L00002|1980-09-15|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00004","name":"Heidelberg Materials AG"},"object":{"type":"operator","id":"L00002","name":"Lehigh Portland Cement Company"},"validFrom":"1980-09-15","validTo":null,"current":true,"derived":true,"evidenceMineId":"1200424","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1200424|L00002|1980-09-15|M00004|1950-01-01|100525"}}],"coverage":{"historyRecords":2,"edgeCount":6,"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":"2000-04-19","lastDate":"2000-04-19","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":2,"firstDate":"1950-01-01","lastDate":"1980-09-15","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":1},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":1,"firstDate":"2000-04-19","lastDate":"2000-04-19","metrics":{"inspectors":1,"recentRows":0,"onSiteHours":1,"inspectionHours":6,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"351072","EVENT_NO":"0597785","INSPECTION_BEGIN_DT":"04/19/2000","INSPECTION_END_DT":"04/19/2000","ACTIVITY_CODE":"10","ACTIVITY":"ATTEMPTED INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"6","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2000-04-19"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":1,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000-Q1":{"hours":0,"employees":0,"production":0}},"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/1200424/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/1200424/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":"1200424","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873}}