{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-18T09:31:49.615Z","identity":{"mine_id":"2100587","name":"45505","status":"Abandoned","status_date":"2009-07-20","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MN","county":"Stearns","nearest_town":"Richmond","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":9,"registeredSources":20,"sourceRows":102},"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":"2026-10-18T09:31:49.615908+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":"2100587","name":"45505"},"operator":{"type":"operator","id":"L00358","name":"Knife River North Central"},"controller":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00294","name":"Bauerly Brothers Inc"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"1950-01-01","validTo":"2001-04-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|M00294|1950-01-01|2001-04-25"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11337","name":"Richmond Sand & Gravel Inc"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"1950-01-01","validTo":"1989-04-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L11337|1950-01-01|1989-04-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08775","name":"Elmer  Worm"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"1950-01-01","validTo":"1989-04-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|M08775|1950-01-01|1989-04-15"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08775","name":"Elmer  Worm"},"object":{"type":"operator","id":"L11337","name":"Richmond Sand & Gravel Inc"},"validFrom":"1950-01-01","validTo":"1989-04-15","current":false,"derived":true,"evidenceMineId":"2100587","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L11337|1950-01-01|M08775|1950-01-01|144098"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11338","name":"Granite City Concrete Of Richmond"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"1989-04-16","validTo":"2003-03-12","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L11338|1989-04-16|2003-03-12"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08506","name":"Robert C  Bogard Jr"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"1989-04-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|M08506|1989-04-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08506","name":"Robert C  Bogard Jr"},"object":{"type":"operator","id":"L11338","name":"Granite City Concrete Of Richmond"},"validFrom":"1989-04-16","validTo":"2003-03-12","current":false,"derived":true,"evidenceMineId":"2100587","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L11338|1989-04-16|M08506|1989-04-16|143571"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"2001-04-26","validTo":"2023-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|M09717|2001-04-26|2023-05-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051225","name":"Granite City Concrete Of Watkins - Richmond Plant"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"2003-03-13","validTo":"2007-10-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|0051225|2003-03-13|2007-10-08"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"2003-03-13","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|M09717|2003-03-13|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"operator","id":"0051225","name":"Granite City Concrete Of Watkins - Richmond Plant"},"validFrom":"2003-03-13","validTo":"2007-10-08","current":false,"derived":true,"evidenceMineId":"2100587","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|0051225|2003-03-13|M09717|2003-03-13|147311"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00358","name":"Knife River North Central"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"2007-10-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L00358|2007-10-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00294","name":"Bauerly Brothers Inc"},"object":{"type":"operator","id":"L00358","name":"Knife River North Central"},"validFrom":"2007-10-09","validTo":"2001-04-25","current":false,"derived":true,"evidenceMineId":"2100587","intervalAnomaly":true,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L00358|2007-10-09|M00294|1950-01-01|109098"}},{"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":"2007-10-09","validTo":"2023-05-31","current":false,"derived":true,"evidenceMineId":"2100587","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L00358|2007-10-09|M09717|2001-04-26|147211"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"object":{"type":"mine","id":"2100587","name":"45505"},"validFrom":"2023-06-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|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":"2100587","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2100587|L00358|2007-10-09|0176802|2023-06-01|37705"}}],"coverage":{"historyRecords":6,"edgeCount":16,"intervalAnomalies":1,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-accidents","name":"Accident, Injuries, and Illnesses","domains":["safety","contractors"],"products":["incident trends","severity rates","equipment patterns","peer denominators"],"rowCount":1,"firstDate":"2002-11-14","lastDate":"2002-11-14","metrics":{"daysLost":15,"injuries":1,"fatalities":0,"recentRows":0,"restrictedDays":0,"contractorRecords":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"169501","DOCUMENT_NO":"220023230014","ACCIDENT_DT":"11/14/2002","DEGREE_INJURY":"DAYS AWAY FROM WORK ONLY","CLASSIFICATION":"HANDTOOLS (NONPOWERED)","ACCIDENT_TYPE":"Struck against stationary object","OCCUPATION":"Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech","NO_INJURIES":"1","DAYS_LOST":"15","NARRATIVE":"EMPLOYEE WAS CHANGING THE CUTTING EDGE ON A LOADER BUCKET WHEN HIS WRENCH SLIPPED AND HE CUT HIS RIGHT HAND. HE RECEIVED 21 STITCHES IN PALM OF RIGHT HAND.","sourceDate":"2002-11-14"}]},{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"2009-07-20","lastDate":"2009-07-20","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":"2005-05-18","lastDate":"2005-05-18","metrics":{"ss":0,"delinquent":0,"recentRows":0,"paidPenalty":60,"proposedPenalty":60,"currentAssessment":60},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"349958","VIOLATION_NO":"6175080","ISSUE_DT":"05/18/2005","CFR_STANDARD_CD":"56.12025","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2005-05-18"}]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":6,"firstDate":"1950-01-01","lastDate":"2007-10-09","metrics":{"recentRows":0,"currentOperatorTenures":3,"completedOperatorTenures":3},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":10,"firstDate":"2000-05-23","lastDate":"2008-08-28","metrics":{"inspectors":12,"recentRows":0,"onSiteHours":20.5,"inspectionHours":53.25,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"156390","EVENT_NO":"1006248","INSPECTION_BEGIN_DT":"08/28/2008","INSPECTION_END_DT":"08/28/2008","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8.5","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2008-08-28"},{"SOURCE_ROW_NUMBER":"206470","EVENT_NO":"1005137","INSPECTION_BEGIN_DT":"06/05/2007","INSPECTION_END_DT":"06/05/2007","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"11.25","SUM_TOTAL_ON_SITE_HOURS":"4.75","sourceDate":"2007-06-05"},{"SOURCE_ROW_NUMBER":"915728","EVENT_NO":"0990720","INSPECTION_BEGIN_DT":"10/19/2005","INSPECTION_END_DT":"10/19/2005","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2.5","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2005-10-19"},{"SOURCE_ROW_NUMBER":"612246","EVENT_NO":"0990341","INSPECTION_BEGIN_DT":"05/23/2005","INSPECTION_END_DT":"05/23/2005","ACTIVITY_CODE":"E15","ACTIVITY":"Compliance Follow-up Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2.5","SUM_TOTAL_ON_SITE_HOURS":".75","sourceDate":"2005-05-23"},{"SOURCE_ROW_NUMBER":"236200","EVENT_NO":"0990338","INSPECTION_BEGIN_DT":"05/18/2005","INSPECTION_END_DT":"05/18/2005","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"5.5","SUM_TOTAL_ON_SITE_HOURS":"2.5","sourceDate":"2005-05-18"},{"SOURCE_ROW_NUMBER":"757901","EVENT_NO":"0968542","INSPECTION_BEGIN_DT":"04/28/2004","INSPECTION_END_DT":"04/28/2004","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2004-04-28"},{"SOURCE_ROW_NUMBER":"187575","EVENT_NO":"0715652","INSPECTION_BEGIN_DT":"08/13/2003","INSPECTION_END_DT":"08/13/2003","ACTIVITY_CODE":"82","ACTIVITY":"AT MINE TRAINING ACTIVITIES","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2003-08-13"},{"SOURCE_ROW_NUMBER":"783000","EVENT_NO":"0968108","INSPECTION_BEGIN_DT":"06/24/2003","INSPECTION_END_DT":"06/24/2003","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"8","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2003-06-24"},{"SOURCE_ROW_NUMBER":"282089","EVENT_NO":"0811994","INSPECTION_BEGIN_DT":"06/13/2001","INSPECTION_END_DT":"06/13/2001","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4","SUM_TOTAL_ON_SITE_HOURS":"3","sourceDate":"2001-06-13"},{"SOURCE_ROW_NUMBER":"964837","EVENT_NO":"0722645","INSPECTION_BEGIN_DT":"05/23/2000","INSPECTION_END_DT":"05/23/2000","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2000-05-23"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":66,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2009-Q1":{"hours":0,"employees":0,"production":0},"2008-Q4":{"hours":0,"employees":0,"production":0},"2008-Q3":{"hours":78,"employees":3,"production":0},"2008-Q2":{"hours":0,"employees":0,"production":0},"2008-Q1":{"hours":0,"employees":0,"production":0},"2007-Q4":{"hours":99,"employees":3,"production":0},"2007-Q3":{"hours":286,"employees":4,"production":0},"2007-Q2":{"hours":314,"employees":2,"production":0},"2007-Q1":{"hours":0,"employees":0,"production":0},"2006-Q4":{"hours":714,"employees":2,"production":0},"2006-Q3":{"hours":939,"employees":2,"production":0},"2006-Q2":{"hours":1279,"employees":2,"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":15,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000":{"hours":2944,"employees":5,"production":0},"2001":{"hours":1882,"employees":3,"production":0},"2002":{"hours":3439,"employees":3,"production":0},"2003":{"hours":3589,"employees":3,"production":0},"2004":{"hours":2821,"employees":2,"production":0},"2005":{"hours":3174,"employees":2,"production":0},"2006":{"hours":3197,"employees":2,"production":0},"2007":{"hours":699,"employees":3,"production":0},"2008":{"hours":78,"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-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":1,"firstDate":"2005-05-18","lastDate":"2005-05-18","metrics":{"ss":0,"amountDue":60,"contested":0,"amountPaid":60,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":60},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1336825","VIOLATION_NO":"6175080","VIOLATION_ISSUE_DT":"05/18/2005","SIG_SUB":"N","PART_SECTION":"56.12025","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"05/23/2005","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2005-05-18"}]}],"safety":{"href":"/api/v1/mines/2100587/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2100587/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":"Grounding circuit enclosures.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12025","part":"56","subchapter":"K","subpart":"K","id":"56.12025","citation":"30 CFR 56.12025","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":"2100587","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666}}