{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"2102860","name":"45950","status":"Abandoned","status_date":"2007-07-16","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MN","county":"Isanti","nearest_town":"Braham","operator_id":"L00358","operator_name":"Knife River North Central","controller_id":"0176802","controller_name":"Knife River Corporation","district":"M4","office":"Duluth District","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":8,"registeredSources":20,"sourceRows":89},"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":"2102860","name":"45950"},"operator":{"type":"operator","id":"L00358","name":"Knife River North Central"},"controller":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00294","name":"Bauerly Brothers Inc"},"object":{"type":"mine","id":"2102860","name":"45950"},"validFrom":"1950-01-01","validTo":"2001-04-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102860|M00294|1950-01-01|2001-04-25"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00358","name":"Knife River North Central"},"object":{"type":"mine","id":"2102860","name":"45950"},"validFrom":"1981-05-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102860|L00358|1981-05-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00294","name":"Bauerly Brothers Inc"},"object":{"type":"operator","id":"L00358","name":"Knife River North Central"},"validFrom":"1981-05-01","validTo":"2001-04-25","current":false,"derived":true,"evidenceMineId":"2102860","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102860|L00358|1981-05-01|M00294|1950-01-01|109077"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"mine","id":"2102860","name":"45950"},"validFrom":"2001-04-26","validTo":"2023-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102860|M09717|2001-04-26|2023-05-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"operator","id":"L00358","name":"Knife River North Central"},"validFrom":"2001-04-26","validTo":"2023-05-31","current":false,"derived":true,"evidenceMineId":"2102860","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102860|L00358|1981-05-01|M09717|2001-04-26|147189"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"object":{"type":"mine","id":"2102860","name":"45950"},"validFrom":"2023-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102860|0176802|2023-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"object":{"type":"operator","id":"L00358","name":"Knife River North Central"},"validFrom":"2023-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2102860","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102860|L00358|1981-05-01|0176802|2023-06-01|37710"}}],"coverage":{"historyRecords":3,"edgeCount":7,"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":"2007-07-16","lastDate":"2007-07-16","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":1,"firstDate":"2003-06-24","lastDate":"2003-06-24","metrics":{"ss":1,"delinquent":1,"recentRows":0,"paidPenalty":143,"proposedPenalty":143,"currentAssessment":143},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"319654","VIOLATION_NO":"6158612","ISSUE_DT":"06/24/2003","CFR_STANDARD_CD":"56.14211(a)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"143.00","CURRENT_ASSESSMENT_AMT":"143.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2003-06-24"}]},{"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":"1981-05-01","lastDate":"1981-05-01","metrics":{"recentRows":0,"currentOperatorTenures":3,"completedOperatorTenures":0},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":8,"firstDate":"2000-09-05","lastDate":"2006-05-31","metrics":{"inspectors":9,"recentRows":0,"onSiteHours":17.5,"inspectionHours":51.25,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"338100","EVENT_NO":"0991116","INSPECTION_BEGIN_DT":"05/31/2006","INSPECTION_END_DT":"05/31/2006","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"7.25","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2006-05-31"},{"SOURCE_ROW_NUMBER":"562548","EVENT_NO":"0991086","INSPECTION_BEGIN_DT":"12/06/2005","INSPECTION_END_DT":"12/06/2005","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"7.5","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2005-12-06"},{"SOURCE_ROW_NUMBER":"202459","EVENT_NO":"0990340","INSPECTION_BEGIN_DT":"05/23/2005","INSPECTION_END_DT":"05/23/2005","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5.5","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2005-05-23"},{"SOURCE_ROW_NUMBER":"262865","EVENT_NO":"0968552","INSPECTION_BEGIN_DT":"05/20/2004","INSPECTION_END_DT":"05/20/2004","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"1084809","EVENT_NO":"0968565","INSPECTION_BEGIN_DT":"08/14/2003","INSPECTION_END_DT":"08/14/2003","ACTIVITY_CODE":"82","ACTIVITY":"AT MINE TRAINING ACTIVITIES","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2003-08-14"},{"SOURCE_ROW_NUMBER":"193890","EVENT_NO":"0968109","INSPECTION_BEGIN_DT":"06/24/2003","INSPECTION_END_DT":"06/25/2003","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"12","SUM_TOTAL_ON_SITE_HOURS":"6","sourceDate":"2003-06-24"},{"SOURCE_ROW_NUMBER":"924003","EVENT_NO":"0967872","INSPECTION_BEGIN_DT":"06/24/2002","INSPECTION_END_DT":"06/24/2002","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2002-06-24"},{"SOURCE_ROW_NUMBER":"1062857","EVENT_NO":"0812412","INSPECTION_BEGIN_DT":"09/05/2000","INSPECTION_END_DT":"09/05/2000","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8","SUM_TOTAL_ON_SITE_HOURS":"5","sourceDate":"2000-09-05"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":58,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2007-Q3":{"hours":0,"employees":0,"production":0},"2007-Q2":{"hours":262,"employees":2,"production":0},"2007-Q1":{"hours":0,"employees":0,"production":0},"2006-Q4":{"hours":214,"employees":4,"production":0},"2006-Q3":{"hours":61,"employees":2,"production":0},"2006-Q2":{"hours":550,"employees":3,"production":0},"2006-Q1":{"hours":249,"employees":2,"production":0},"2005-Q4":{"hours":494,"employees":2,"production":0},"2005-Q3":{"hours":500,"employees":2,"production":0},"2005-Q2":{"hours":494,"employees":2,"production":0},"2005-Q1":{"hours":8,"employees":1,"production":0},"2004-Q4":{"hours":183,"employees":3,"production":0}},"recentRecords":[]},{"id":"msha-mine-production-yearly","name":"Mine Employment and Production — Yearly","domains":["production","safety","compliance"],"products":["annual trend","backfill","quarterly reconciliation"],"rowCount":16,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000":{"hours":848,"employees":3,"production":0},"2001":{"hours":976,"employees":3,"production":0},"2002":{"hours":1002,"employees":4,"production":0},"2003":{"hours":909,"employees":2,"production":0},"2004":{"hours":967,"employees":3,"production":0},"2005":{"hours":1496,"employees":2,"production":0},"2006":{"hours":1074,"employees":3,"production":0},"2007":{"hours":262,"employees":2,"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":[]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":1,"firstDate":"2003-06-24","lastDate":"2003-06-24","metrics":{"ss":1,"amountDue":143,"contested":0,"amountPaid":143,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":143},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1359662","VIOLATION_NO":"6158612","VIOLATION_ISSUE_DT":"06/24/2003","SIG_SUB":"Y","PART_SECTION":"56.14211(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"06/24/2003","PROPOSED_PENALTY":"143","AMOUNT_DUE":"143","AMOUNT_PAID":"143","CONTESTED_IND":"N","sourceDate":"2003-06-24"}]}],"safety":{"href":"/api/v1/mines/2102860/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2102860/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":[{"chapter":"I","heading":"Blocking equipment in a raised position.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14211","part":"56","subchapter":"K","subpart":"M","id":"56.14211","citation":"30 CFR 56.14211","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH","partHeading":"PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES","subpartHeading":"","text":null,"occurrenceCount":1}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"2102860","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}