{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"2103402","name":"44482","status":"Abandoned","status_date":"2010-03-11","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MN","county":"Benton","nearest_town":"Sauk Rapids","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":45.591944,"longitude":-94.166111},"coverage":{"contributingSources":10,"registeredSources":20,"sourceRows":78},"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":"2103402","name":"44482"},"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":"2103402","name":"44482"},"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":"2103402|M00294|1950-01-01|2001-04-25"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"mine","id":"2103402","name":"44482"},"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":"2103402|M09717|2001-04-26|2023-05-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00358","name":"Knife River North Central"},"object":{"type":"mine","id":"2103402","name":"44482"},"validFrom":"2003-12-08","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103402|L00358|2003-12-08|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00294","name":"Bauerly Brothers Inc"},"object":{"type":"operator","id":"L00358","name":"Knife River North Central"},"validFrom":"2003-12-08","validTo":"2001-04-25","current":false,"derived":true,"evidenceMineId":"2103402","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103402|L00358|2003-12-08|M00294|1950-01-01|109106"}},{"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":"2003-12-08","validTo":"2023-05-31","current":false,"derived":true,"evidenceMineId":"2103402","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103402|L00358|2003-12-08|M09717|2001-04-26|147218"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"object":{"type":"mine","id":"2103402","name":"44482"},"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":"2103402|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":"2103402","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2103402|L00358|2003-12-08|0176802|2023-06-01|37746"}}],"coverage":{"historyRecords":3,"edgeCount":7,"intervalAnomalies":1,"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":"2010-03-11","lastDate":"2010-03-11","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":2,"firstDate":"2005-10-12","lastDate":"2007-07-18","metrics":{"ss":0,"delinquent":2,"recentRows":0,"paidPenalty":160,"proposedPenalty":160,"currentAssessment":160},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"373357","VIOLATION_NO":"6193931","ISSUE_DT":"07/18/2007","CFR_STANDARD_CD":"56.12004","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"100.00","CURRENT_ASSESSMENT_AMT":"100.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2007-07-18"},{"SOURCE_ROW_NUMBER":"320584","VIOLATION_NO":"7838306","ISSUE_DT":"10/12/2005","CFR_STANDARD_CD":"56.14112(b)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2005-10-12"}]},{"id":"msha-conferences","name":"Conferences","domains":["compliance","legal"],"products":["conference history","post-issuance changes","citation lifecycle"],"rowCount":1,"firstDate":"2007-08-23","lastDate":"2007-08-23","metrics":{"linkedIssuances":1},"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":3,"firstDate":"2003-12-08","lastDate":"2003-12-08","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":7,"firstDate":"2003-12-08","lastDate":"2009-08-10","metrics":{"inspectors":8,"recentRows":0,"onSiteHours":45.75,"inspectionHours":74.25,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"616421","EVENT_NO":"1006986","INSPECTION_BEGIN_DT":"08/10/2009","INSPECTION_END_DT":"08/10/2009","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1.5","SUM_TOTAL_ON_SITE_HOURS":".5","sourceDate":"2009-08-10"},{"SOURCE_ROW_NUMBER":"925474","EVENT_NO":"1006005","INSPECTION_BEGIN_DT":"05/22/2008","INSPECTION_END_DT":"05/22/2008","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4.5","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2008-05-22"},{"SOURCE_ROW_NUMBER":"154756","EVENT_NO":"1005761","INSPECTION_BEGIN_DT":"07/18/2007","INSPECTION_END_DT":"07/24/2007","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"14.75","SUM_TOTAL_ON_SITE_HOURS":"10.25","sourceDate":"2007-07-18"},{"SOURCE_ROW_NUMBER":"824240","EVENT_NO":"1005136","INSPECTION_BEGIN_DT":"05/31/2007","INSPECTION_END_DT":"05/31/2007","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1.5","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2007-05-31"},{"SOURCE_ROW_NUMBER":"676315","EVENT_NO":"0968648","INSPECTION_BEGIN_DT":"10/12/2005","INSPECTION_END_DT":"10/12/2005","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"3","sourceDate":"2005-10-12"},{"SOURCE_ROW_NUMBER":"475600","EVENT_NO":"0990294","INSPECTION_BEGIN_DT":"12/01/2004","INSPECTION_END_DT":"12/01/2004","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2004-12-01"},{"SOURCE_ROW_NUMBER":"1079258","EVENT_NO":"0968529","INSPECTION_BEGIN_DT":"12/08/2003","INSPECTION_END_DT":"12/09/2003","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"45","SUM_TOTAL_ON_SITE_HOURS":"30","sourceDate":"2003-12-08"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":46,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2010-Q1":{"hours":0,"employees":0,"production":0},"2009-Q2":{"hours":0,"employees":0,"production":0},"2009-Q1":{"hours":0,"employees":0,"production":0},"2008-Q4":{"hours":146,"employees":3,"production":0},"2008-Q3":{"hours":462,"employees":3,"production":0},"2008-Q2":{"hours":219,"employees":3,"production":0},"2008-Q1":{"hours":0,"employees":0,"production":0},"2007-Q4":{"hours":0,"employees":0,"production":0},"2007-Q3":{"hours":731,"employees":1,"production":0},"2007-Q2":{"hours":0,"employees":0,"production":0},"2007-Q1":{"hours":0,"employees":0,"production":0},"2006-Q4":{"hours":0,"employees":0,"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":9,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2004":{"hours":640,"employees":3,"production":0},"2005":{"hours":710,"employees":2,"production":0},"2006":{"hours":826,"employees":3,"production":0},"2007":{"hours":731,"employees":1,"production":0},"2008":{"hours":827,"employees":3,"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-personal-health-samples","name":"Metal and Nonmetal Personal Health Samples","domains":["health","safety"],"products":["personal exposure trend","occupation patterns","analyte coverage"],"rowCount":6,"firstDate":"2003-12-09","lastDate":"2007-07-24","metrics":{"recentRows":0,"actionTaken":6,"maxExposureRatio":0.6,"overExposureLimit":0,"exposureRatioTotal":1.93},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"94098","EVENT_NO":"1005761","SAMPLE_NO":"000000200705597500","SAMPLE_DATE":"07/24/2007","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.14","EXPOSURE_LIMIT":"0000.81","C_OVER_E":"00.17","JOB_CD_DESC":"Front-end Loader Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2007-07-24"},{"SOURCE_ROW_NUMBER":"94097","EVENT_NO":"1005761","SAMPLE_NO":"000000200705597400","SAMPLE_DATE":"07/24/2007","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.43","EXPOSURE_LIMIT":"0000.72","C_OVER_E":"00.60","JOB_CD_DESC":"Crusher Oper/Worker","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2007-07-24"},{"SOURCE_ROW_NUMBER":"94096","EVENT_NO":"1005761","SAMPLE_NO":"000000200705597300","SAMPLE_DATE":"07/24/2007","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.28","EXPOSURE_LIMIT":"0000.75","C_OVER_E":"00.37","JOB_CD_DESC":"Crusher Oper/Worker","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2007-07-24"},{"SOURCE_ROW_NUMBER":"94095","EVENT_NO":"1005761","SAMPLE_NO":"000000200705597200","SAMPLE_DATE":"07/24/2007","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.42","EXPOSURE_LIMIT":"0001.39","C_OVER_E":"00.30","JOB_CD_DESC":"Front-end Loader Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2007-07-24"},{"SOURCE_ROW_NUMBER":"25239","EVENT_NO":"0968529","SAMPLE_NO":"000000200309936500","SAMPLE_DATE":"12/09/2003","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Dry Screen Plant Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2003-12-09"},{"SOURCE_ROW_NUMBER":"25238","EVENT_NO":"0968529","SAMPLE_NO":"000000200309936400","SAMPLE_DATE":"12/09/2003","CONTAMINANT_DESC":"Quartz, respirable, >1% Qtz","CONCENTRATION":"0000.22","EXPOSURE_LIMIT":"0000.45","C_OVER_E":"00.49","JOB_CD_DESC":"Front-end Loader Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2003-12-09"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":2,"firstDate":"2005-10-12","lastDate":"2007-07-18","metrics":{"ss":0,"amountDue":160,"contested":0,"amountPaid":160,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":160},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1373885","VIOLATION_NO":"6193931","VIOLATION_ISSUE_DT":"07/18/2007","SIG_SUB":"N","PART_SECTION":"56.12004","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"07/18/2007","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2007-07-18"},{"SOURCE_ROW_NUMBER":"1373886","VIOLATION_NO":"7838306","VIOLATION_ISSUE_DT":"10/12/2005","SIG_SUB":"N","PART_SECTION":"56.14112(b)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"10/12/2005","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2005-10-12"}]}],"safety":{"href":"/api/v1/mines/2103402/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2103402/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":"Electrical conductors.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004","part":"56","subchapter":"K","subpart":"K","id":"56.12004","citation":"30 CFR 56.12004","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},{"chapter":"I","heading":"Construction and maintenance of guards.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112","part":"56","subchapter":"K","subpart":"M","id":"56.14112","citation":"30 CFR 56.14112","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":"2103402","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}