{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"3303673","name":"K & R No 1 (Strip)","status":"Abandoned","status_date":"1990-03-05","mine_type":"Facility","coal_metal":"C","commodity":"Coal (Bituminous)","state":"OH","county":"Stark","nearest_town":"Minerva","operator_id":"P17886","operator_name":"K & R Mining Inc","controller_id":"C12529","controller_name":"Kelm Warren E & Dwight A Ensley","district":"C03","office":"St. Clairsville OH Field Office","employees":0,"latitude":40.7375,"longitude":-81.1194},"coverage":{"contributingSources":3,"registeredSources":20,"sourceRows":4},"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":"3303673","name":"K & R No 1 (Strip)"},"operator":{"type":"operator","id":"P17886","name":"K & R Mining Inc"},"controller":{"type":"controller","id":"C12529","name":"Kelm Warren E & Dwight A Ensley"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C04485","name":"Keffler David K"},"object":{"type":"mine","id":"3303673","name":"K & R No 1 (Strip)"},"validFrom":"1974-11-01","validTo":"1987-11-03","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3303673|C04485|1974-11-01|1987-11-03"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P05408","name":"Keffler & Rose Enterprises Inc"},"object":{"type":"mine","id":"3303673","name":"K & R No 1 (Strip)"},"validFrom":"1978-02-01","validTo":"1986-06-30","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3303673|P05408|1978-02-01|1986-06-30"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C04485","name":"Keffler David K"},"object":{"type":"operator","id":"P05408","name":"Keffler & Rose Enterprises Inc"},"validFrom":"1978-02-01","validTo":"1986-06-30","current":false,"derived":true,"evidenceMineId":"3303673","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3303673|P05408|1978-02-01|C04485|1974-11-01|66091"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P17886","name":"K & R Mining Inc"},"object":{"type":"mine","id":"3303673","name":"K & R No 1 (Strip)"},"validFrom":"1986-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3303673|P17886|1986-07-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C12529","name":"Kelm Warren E & Dwight A Ensley"},"object":{"type":"mine","id":"3303673","name":"K & R No 1 (Strip)"},"validFrom":"1986-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3303673|C12529|1986-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C12529","name":"Kelm Warren E & Dwight A Ensley"},"object":{"type":"operator","id":"P17886","name":"K & R Mining Inc"},"validFrom":"1986-07-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"3303673","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3303673|P17886|1986-07-01|C12529|1986-07-01|87315"}}],"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":"1990-03-05","lastDate":"1990-03-05","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":"1978-02-01","lastDate":"1986-07-01","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":1},"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/3303673/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/3303673/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":"3303673","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}