{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"2101810","name":"EL-JAY #2","status":"Abandoned","status_date":"2002-04-02","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MN","county":"St Louis","nearest_town":"","operator_id":"L02237","operator_name":"Premier Aggregates Inc","controller_id":"M01968","controller_name":"Michael J Skubic","district":"M4","office":"Duluth District","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":6,"registeredSources":20,"sourceRows":25},"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":"2101810","name":"EL-JAY #2"},"operator":{"type":"operator","id":"L02237","name":"Premier Aggregates Inc"},"controller":{"type":"controller","id":"M01968","name":"Michael J Skubic"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02383","name":"Abi Contracting Inc"},"object":{"type":"mine","id":"2101810","name":"EL-JAY #2"},"validFrom":"1950-01-01","validTo":"1981-06-17","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2101810|L02383|1950-01-01|1981-06-17"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01640","name":"M G  Peterson"},"object":{"type":"mine","id":"2101810","name":"EL-JAY #2"},"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":"2101810|M01640|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01640","name":"M G  Peterson"},"object":{"type":"operator","id":"L02383","name":"Abi Contracting Inc"},"validFrom":"1950-01-01","validTo":"1981-06-17","current":false,"derived":true,"evidenceMineId":"2101810","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2101810|L02383|1950-01-01|M01640|1950-01-01|119736"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01968","name":"Michael J Skubic"},"object":{"type":"mine","id":"2101810","name":"EL-JAY #2"},"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":"2101810|M01968|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L02237","name":"Premier Aggregates Inc"},"object":{"type":"mine","id":"2101810","name":"EL-JAY #2"},"validFrom":"1981-06-18","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2101810|L02237|1981-06-18|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01968","name":"Michael J Skubic"},"object":{"type":"operator","id":"L02237","name":"Premier Aggregates Inc"},"validFrom":"1981-06-18","validTo":null,"current":true,"derived":true,"evidenceMineId":"2101810","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2101810|L02237|1981-06-18|M01968|1950-01-01|122414"}}],"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":"2002-04-02","lastDate":"2002-04-02","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":"1981-06-18","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":"2001-12-20","lastDate":"2001-12-20","metrics":{"inspectors":1,"recentRows":0,"onSiteHours":10,"inspectionHours":16,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"681922","EVENT_NO":"0715668","INSPECTION_BEGIN_DT":"12/20/2001","INSPECTION_END_DT":"12/21/2001","ACTIVITY_CODE":"16","ACTIVITY":"PART 50 AUDIT","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"16","SUM_TOTAL_ON_SITE_HOURS":"10","sourceDate":"2001-12-20"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":16,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2001-Q4":{"hours":2953,"employees":10,"production":0},"2001-Q3":{"hours":3721,"employees":14,"production":0},"2001-Q2":{"hours":4019,"employees":11,"production":0},"2001-Q1":{"hours":3491,"employees":13,"production":0},"2000-Q4":{"hours":3502,"employees":11,"production":0},"2000-Q3":{"hours":3791,"employees":10,"production":0},"2000-Q2":{"hours":4422,"employees":9,"production":0},"2000-Q1":{"hours":1312,"employees":9,"production":0}},"recentRecords":[]},{"id":"msha-mine-production-yearly","name":"Mine Employment and Production — Yearly","domains":["production","safety","compliance"],"products":["annual trend","backfill","quarterly reconciliation"],"rowCount":4,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000":{"hours":13027,"employees":10,"production":0},"2001":{"hours":14184,"employees":12,"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/2101810/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2101810/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":"2101810","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}