{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4000300","name":"No 4 Mine","status":"Abandoned and Sealed","status_date":"1979-10-01","mine_type":"Underground","coal_metal":"C","commodity":"Coal (Bituminous)","state":"TN","county":"Campbell","nearest_town":"Pioneer","operator_id":"P10515","operator_name":"E & N Coal Company","controller_id":"C08008","controller_name":"Campbell Ernest & Neil","district":"C07","office":"Barbourville KY Field Office","employees":0,"latitude":36.4708,"longitude":-84.1889},"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":"4000300","name":"No 4 Mine"},"operator":{"type":"operator","id":"P10515","name":"E & N Coal Company"},"controller":{"type":"controller","id":"C08008","name":"Campbell Ernest & Neil"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04162","name":"Rex Mining Company"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1950-01-01","validTo":"1976-04-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P04162|1950-01-01|1976-04-01"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C03423","name":"Walden Mit N"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1950-01-01","validTo":"1976-04-01","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|C03423|1950-01-01|1976-04-01"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C03423","name":"Walden Mit N"},"object":{"type":"operator","id":"P04162","name":"Rex Mining Company"},"validFrom":"1950-01-01","validTo":"1976-04-01","current":false,"derived":true,"evidenceMineId":"4000300","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P04162|1950-01-01|C03423|1950-01-01|62828"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P04164","name":"Rex Mining Company"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1976-04-02","validTo":"1979-11-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P04164|1976-04-02|1979-11-27"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C02720","name":"Walden John T"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1976-04-02","validTo":"1979-11-27","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|C02720|1976-04-02|1979-11-27"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C02720","name":"Walden John T"},"object":{"type":"operator","id":"P04164","name":"Rex Mining Company"},"validFrom":"1976-04-02","validTo":"1979-11-27","current":false,"derived":true,"evidenceMineId":"4000300","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P04164|1976-04-02|C02720|1976-04-02|60570"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10308","name":"Rex Mining Company"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1979-11-28","validTo":"1981-01-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P10308|1979-11-28|1981-01-07"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07871","name":"Meredith Johnie"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1979-11-28","validTo":"1981-01-07","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|C07871|1979-11-28|1981-01-07"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07871","name":"Meredith Johnie"},"object":{"type":"operator","id":"P10308","name":"Rex Mining Company"},"validFrom":"1979-11-28","validTo":"1981-01-07","current":false,"derived":true,"evidenceMineId":"4000300","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P10308|1979-11-28|C07871|1979-11-28|75884"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C08008","name":"Campbell Ernest & Neil"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1980-05-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|C08008|1980-05-13|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P10515","name":"E & N Coal Company"},"object":{"type":"mine","id":"4000300","name":"No 4 Mine"},"validFrom":"1981-01-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P10515|1981-01-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C08008","name":"Campbell Ernest & Neil"},"object":{"type":"operator","id":"P10515","name":"E & N Coal Company"},"validFrom":"1981-01-08","validTo":null,"current":true,"derived":true,"evidenceMineId":"4000300","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000300|P10515|1981-01-08|C08008|1980-05-13|76156"}}],"coverage":{"historyRecords":4,"edgeCount":12,"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":"1979-10-01","lastDate":"1979-10-01","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":"1981-01-08","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":3},"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/4000300/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4000300/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":"4000300","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}