{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"0405923","name":"Premier Track300 Crusher","status":"Abandoned","status_date":"2019-12-02","mine_type":"Surface","coal_metal":"M","commodity":"Crushed, Broken Stone NEC","state":"CA","county":"Mendocino","nearest_town":"Garberville","operator_id":"0051403","operator_name":"Laytonville Rock","controller_id":"0041925","controller_name":"Shawn T  Studebaker","district":"M7","office":"Vacaville CA Field Office","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":4,"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":"0405923","name":"Premier Track300 Crusher"},"operator":{"type":"operator","id":"0051403","name":"Laytonville Rock"},"controller":{"type":"controller","id":"0041925","name":"Shawn T  Studebaker"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041925","name":"Shawn T  Studebaker"},"object":{"type":"mine","id":"0405923","name":"Premier Track300 Crusher"},"validFrom":"2003-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405923|0041925|2003-07-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051403","name":"Laytonville Rock"},"object":{"type":"mine","id":"0405923","name":"Premier Track300 Crusher"},"validFrom":"2017-10-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405923|0051403|2017-10-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041925","name":"Shawn T  Studebaker"},"object":{"type":"operator","id":"0051403","name":"Laytonville Rock"},"validFrom":"2017-10-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"0405923","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"0405923|0051403|2017-10-11|0041925|2003-07-01|3303"}}],"coverage":{"historyRecords":1,"edgeCount":3,"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":"2019-12-02","lastDate":"2019-12-02","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":1,"firstDate":"2017-10-11","lastDate":"2017-10-11","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":0},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":1,"firstDate":"2019-05-13","lastDate":"2019-05-13","metrics":{"inspectors":1,"recentRows":0,"onSiteHours":3,"inspectionHours":8,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"114616","EVENT_NO":"6828711","INSPECTION_BEGIN_DT":"05/13/2019","INSPECTION_END_DT":"05/22/2019","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8","SUM_TOTAL_ON_SITE_HOURS":"3","sourceDate":"2019-05-13"}]},{"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/0405923/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/0405923/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":"0405923","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}