{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"5001889","name":"Unisea Quarry","status":"Abandoned","status_date":"2009-10-01","mine_type":"Surface","coal_metal":"M","commodity":"Crushed, Broken Stone NEC","state":"AK","county":"Aleutians West","nearest_town":"Dutch Harbor","operator_id":"0136275","operator_name":"Orion Marine Contractors","controller_id":"0115963","controller_name":"Orion Marine Group Inc","district":"M7","office":"Anchorage AK Field Office","employees":0,"latitude":53.904722,"longitude":-166.510555},"coverage":{"contributingSources":5,"registeredSources":20,"sourceRows":7},"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":"5001889","name":"Unisea Quarry"},"operator":{"type":"operator","id":"0136275","name":"Orion Marine Contractors"},"controller":{"type":"controller","id":"0115963","name":"Orion Marine Group Inc"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041731","name":"Bradley K  West"},"object":{"type":"mine","id":"5001889","name":"Unisea Quarry"},"validFrom":"2003-04-17","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5001889|0041731|2003-04-17|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051277","name":"West Construction Company"},"object":{"type":"mine","id":"5001889","name":"Unisea Quarry"},"validFrom":"2008-06-27","validTo":"2016-02-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5001889|0051277|2008-06-27|2016-02-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041731","name":"Bradley K  West"},"object":{"type":"operator","id":"0051277","name":"West Construction Company"},"validFrom":"2008-06-27","validTo":"2016-02-15","current":false,"derived":true,"evidenceMineId":"5001889","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5001889|0051277|2008-06-27|0041731|2003-04-17|3022"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0115963","name":"Orion Marine Group Inc"},"object":{"type":"mine","id":"5001889","name":"Unisea Quarry"},"validFrom":"2014-10-07","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5001889|0115963|2014-10-07|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0136275","name":"Orion Marine Contractors"},"object":{"type":"mine","id":"5001889","name":"Unisea Quarry"},"validFrom":"2016-02-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5001889|0136275|2016-02-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0115963","name":"Orion Marine Group Inc"},"object":{"type":"operator","id":"0136275","name":"Orion Marine Contractors"},"validFrom":"2016-02-16","validTo":null,"current":true,"derived":true,"evidenceMineId":"5001889","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"5001889|0136275|2016-02-16|0115963|2014-10-07|21867"}}],"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":"2009-10-01","lastDate":"2009-10-01","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":2,"firstDate":"2008-06-27","lastDate":"2016-02-16","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":"2009-08-26","lastDate":"2009-08-26","metrics":{"inspectors":1,"recentRows":0,"onSiteHours":0,"inspectionHours":5,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"847812","EVENT_NO":"1140908","INSPECTION_BEGIN_DT":"08/26/2009","INSPECTION_END_DT":"08/26/2009","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2009-08-26"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":2,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2009-Q2":{"hours":0,"employees":0,"production":0},"2009-Q1":{"hours":0,"employees":0,"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/5001889/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/5001889/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":"5001889","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}