{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4000742","name":"Sewanee Plant","status":"Abandoned","status_date":"1979-10-09","mine_type":"Facility","coal_metal":"M","commodity":"Crushed, Broken Sandstone","state":"TN","county":"Franklin","nearest_town":"","operator_id":"L00208","operator_name":"Martin Marietta Aggregates","controller_id":"M00174","controller_name":"Martin Marietta Materials Inc","district":"M3","office":"Birmingham District","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":3,"registeredSources":20,"sourceRows":5},"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":"4000742","name":"Sewanee Plant"},"operator":{"type":"operator","id":"L00208","name":"Martin Marietta 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":"controller_controls_mine","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"mine","id":"4000742","name":"Sewanee Plant"},"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":"4000742|M00174|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L04111","name":"Wedron Silica Division"},"object":{"type":"mine","id":"4000742","name":"Sewanee Plant"},"validFrom":"1950-01-01","validTo":"1979-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|L04111|1950-01-01|1979-04-30"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M03301","name":"Sherman County - KS"},"object":{"type":"mine","id":"4000742","name":"Sewanee Plant"},"validFrom":"1950-01-01","validTo":"1979-04-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|M03301|1950-01-01|1979-04-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M03301","name":"Sherman County - KS"},"object":{"type":"operator","id":"L04111","name":"Wedron Silica Division"},"validFrom":"1950-01-01","validTo":"1979-04-30","current":false,"derived":true,"evidenceMineId":"4000742","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|L04111|1950-01-01|M03301|1950-01-01|128695"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L01910","name":"Wedron Silica Company"},"object":{"type":"mine","id":"4000742","name":"Sewanee Plant"},"validFrom":"1979-05-01","validTo":"1979-09-11","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|L01910|1979-05-01|1979-09-11"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M01720","name":"Twentieth Century Fox"},"object":{"type":"mine","id":"4000742","name":"Sewanee Plant"},"validFrom":"1979-05-01","validTo":"1979-10-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|M01720|1979-05-01|1979-10-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M01720","name":"Twentieth Century Fox"},"object":{"type":"operator","id":"L01910","name":"Wedron Silica Company"},"validFrom":"1979-05-01","validTo":"1979-09-11","current":false,"derived":true,"evidenceMineId":"4000742","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|L01910|1979-05-01|M01720|1979-05-01|120569"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"object":{"type":"mine","id":"4000742","name":"Sewanee Plant"},"validFrom":"1979-09-12","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|L00208|1979-09-12|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00174","name":"Martin Marietta Materials Inc"},"object":{"type":"operator","id":"L00208","name":"Martin Marietta Aggregates"},"validFrom":"1979-09-12","validTo":null,"current":true,"derived":true,"evidenceMineId":"4000742","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4000742|L00208|1979-09-12|M00174|1950-01-01|106288"}}],"coverage":{"historyRecords":3,"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":"1979-10-09","lastDate":"1979-10-09","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":3,"firstDate":"1950-01-01","lastDate":"1979-09-12","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":2},"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/4000742/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4000742/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":"4000742","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}