{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"3608102","name":"Merrill Strip","status":"Abandoned","status_date":"2002-09-30","mine_type":"Surface","coal_metal":"C","commodity":"Coal (Bituminous)","state":"PA","county":"Somerset","nearest_town":"Garrett","operator_id":"P22082","operator_name":"Redstone Mining Inc","controller_id":"C13540","controller_name":"Erickson Charles Jr","district":"C03","office":"Indiana PA Field Office","employees":0,"latitude":39.866667,"longitude":-79.116667},"coverage":{"contributingSources":4,"registeredSources":20,"sourceRows":8},"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":"3608102","name":"Merrill Strip"},"operator":{"type":"operator","id":"P22082","name":"Redstone Mining Inc"},"controller":{"type":"controller","id":"C13540","name":"Erickson Charles Jr"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C07830","name":"Fetterolf Donald L"},"object":{"type":"mine","id":"3608102","name":"Merrill Strip"},"validFrom":"1979-05-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608102|C07830|1979-05-24|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P11914","name":"Commonwealth Coals Inc"},"object":{"type":"mine","id":"3608102","name":"Merrill Strip"},"validFrom":"1989-08-01","validTo":"1992-06-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608102|P11914|1989-08-01|1992-06-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C07830","name":"Fetterolf Donald L"},"object":{"type":"operator","id":"P11914","name":"Commonwealth Coals Inc"},"validFrom":"1989-08-01","validTo":"1992-06-28","current":false,"derived":true,"evidenceMineId":"3608102","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608102|P11914|1989-08-01|C07830|1979-05-24|75808"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P22082","name":"Redstone Mining Inc"},"object":{"type":"mine","id":"3608102","name":"Merrill Strip"},"validFrom":"1992-06-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608102|P22082|1992-06-29|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13540","name":"Erickson Charles Jr Et Al"},"object":{"type":"mine","id":"3608102","name":"Merrill Strip"},"validFrom":"1992-06-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608102|C13540|1992-06-29|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13540","name":"Erickson Charles Jr Et Al"},"object":{"type":"operator","id":"P22082","name":"Redstone Mining Inc"},"validFrom":"1992-06-29","validTo":null,"current":true,"derived":true,"evidenceMineId":"3608102","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3608102|P22082|1992-06-29|C13540|1992-06-29|90260"}}],"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":"2002-09-30","lastDate":"2002-09-30","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":"1989-08-01","lastDate":"1992-06-29","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":4,"firstDate":"2000-03-30","lastDate":"2001-09-19","metrics":{"inspectors":4,"recentRows":0,"onSiteHours":1.75,"inspectionHours":6.25,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"535816","EVENT_NO":"4034794","INSPECTION_BEGIN_DT":"09/19/2001","INSPECTION_END_DT":"09/19/2001","ACTIVITY_CODE":"CFA","ACTIVITY":"MINE IDLE","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1.25","SUM_TOTAL_ON_SITE_HOURS":".25","sourceDate":"2001-09-19"},{"SOURCE_ROW_NUMBER":"242374","EVENT_NO":"4034717","INSPECTION_BEGIN_DT":"03/29/2001","INSPECTION_END_DT":"03/29/2001","ACTIVITY_CODE":"CFA","ACTIVITY":"MINE IDLE","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2","SUM_TOTAL_ON_SITE_HOURS":".5","sourceDate":"2001-03-29"},{"SOURCE_ROW_NUMBER":"995039","EVENT_NO":"4032122","INSPECTION_BEGIN_DT":"09/28/2000","INSPECTION_END_DT":"09/28/2000","ACTIVITY_CODE":"CFA","ACTIVITY":"MINE IDLE","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1.5","SUM_TOTAL_ON_SITE_HOURS":".5","sourceDate":"2000-09-28"},{"SOURCE_ROW_NUMBER":"881163","EVENT_NO":"4033918","INSPECTION_BEGIN_DT":"03/30/2000","INSPECTION_END_DT":"03/31/2000","ACTIVITY_CODE":"CFA","ACTIVITY":"MINE IDLE","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1.5","SUM_TOTAL_ON_SITE_HOURS":".5","sourceDate":"2000-03-30"}]},{"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/3608102/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/3608102/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":"3608102","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}