{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"2102640","name":"45970","status":"Abandoned","status_date":"2007-05-10","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MN","county":"Morrison","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":null,"longitude":null},"coverage":{"contributingSources":6,"registeredSources":20,"sourceRows":83},"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":"2102640","name":"45970"},"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":"2102640","name":"45970"},"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":"2102640|M00294|1950-01-01|2001-04-25"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11137","name":"Pierz Ready Mix"},"object":{"type":"mine","id":"2102640","name":"45970"},"validFrom":"1978-03-09","validTo":"1989-06-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L11137|1978-03-09|1989-06-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08621","name":"Stanley  Przybilla"},"object":{"type":"mine","id":"2102640","name":"45970"},"validFrom":"1978-03-09","validTo":"1989-06-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|M08621|1978-03-09|1989-06-26"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08621","name":"Stanley  Przybilla"},"object":{"type":"operator","id":"L11137","name":"Pierz Ready Mix"},"validFrom":"1978-03-09","validTo":"1989-06-26","current":false,"derived":true,"evidenceMineId":"2102640","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L11137|1978-03-09|M08621|1978-03-09|143732"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L11138","name":"Pierz Ready Mix"},"object":{"type":"mine","id":"2102640","name":"45970"},"validFrom":"1989-06-27","validTo":"1998-04-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L11138|1989-06-27|1998-04-28"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M08622","name":"James V  Litke"},"object":{"type":"mine","id":"2102640","name":"45970"},"validFrom":"1989-06-27","validTo":"1998-04-28","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|M08622|1989-06-27|1998-04-28"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M08622","name":"James V  Litke"},"object":{"type":"operator","id":"L11138","name":"Pierz Ready Mix"},"validFrom":"1989-06-27","validTo":"1998-04-28","current":false,"derived":true,"evidenceMineId":"2102640","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L11138|1989-06-27|M08622|1989-06-27|143733"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00358","name":"Knife River North Central"},"object":{"type":"mine","id":"2102640","name":"45970"},"validFrom":"1998-04-29","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L00358|1998-04-29|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00294","name":"Bauerly Brothers Inc"},"object":{"type":"operator","id":"L00358","name":"Knife River North Central"},"validFrom":"1998-04-29","validTo":"2001-04-25","current":false,"derived":true,"evidenceMineId":"2102640","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L00358|1998-04-29|M00294|1950-01-01|109074"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"mine","id":"2102640","name":"45970"},"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":"2102640|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":"2102640","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L00358|1998-04-29|M09717|2001-04-26|147186"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"object":{"type":"mine","id":"2102640","name":"45970"},"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":"2102640|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":"2102640","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2102640|L00358|1998-04-29|0176802|2023-06-01|37703"}}],"coverage":{"historyRecords":5,"edgeCount":13,"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":"2007-05-10","lastDate":"2007-05-10","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":5,"firstDate":"1978-03-09","lastDate":"1998-04-29","metrics":{"recentRows":0,"currentOperatorTenures":3,"completedOperatorTenures":2},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":7,"firstDate":"2000-06-14","lastDate":"2005-11-01","metrics":{"inspectors":7,"recentRows":0,"onSiteHours":22,"inspectionHours":47.25,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"482337","EVENT_NO":"0990732","INSPECTION_BEGIN_DT":"11/01/2005","INSPECTION_END_DT":"11/01/2005","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"3.75","SUM_TOTAL_ON_SITE_HOURS":"1.5","sourceDate":"2005-11-01"},{"SOURCE_ROW_NUMBER":"535301","EVENT_NO":"0990328","INSPECTION_BEGIN_DT":"05/05/2005","INSPECTION_END_DT":"05/05/2005","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"3.5","SUM_TOTAL_ON_SITE_HOURS":"1.5","sourceDate":"2005-05-05"},{"SOURCE_ROW_NUMBER":"1144739","EVENT_NO":"0990172","INSPECTION_BEGIN_DT":"06/24/2004","INSPECTION_END_DT":"06/24/2004","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2004-06-24"},{"SOURCE_ROW_NUMBER":"814233","EVENT_NO":"0968793","INSPECTION_BEGIN_DT":"12/16/2003","INSPECTION_END_DT":"12/16/2003","ACTIVITY_CODE":"16","ACTIVITY":"PART 50 AUDIT","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2003-12-16"},{"SOURCE_ROW_NUMBER":"134381","EVENT_NO":"0968091","INSPECTION_BEGIN_DT":"05/19/2003","INSPECTION_END_DT":"05/19/2003","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2003-05-19"},{"SOURCE_ROW_NUMBER":"431814","EVENT_NO":"0812202","INSPECTION_BEGIN_DT":"05/23/2002","INSPECTION_END_DT":"05/23/2002","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"7","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2002-05-23"},{"SOURCE_ROW_NUMBER":"247044","EVENT_NO":"0722655","INSPECTION_BEGIN_DT":"06/14/2000","INSPECTION_END_DT":"06/14/2000","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"16","SUM_TOTAL_ON_SITE_HOURS":"8","sourceDate":"2000-06-14"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":55,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2007-Q2":{"hours":0,"employees":0,"production":0},"2007-Q1":{"hours":0,"employees":0,"production":0},"2006-Q4":{"hours":0,"employees":0,"production":0},"2006-Q3":{"hours":1118,"employees":5,"production":0},"2006-Q2":{"hours":0,"employees":0,"production":0},"2006-Q1":{"hours":161,"employees":3,"production":0},"2005-Q4":{"hours":384,"employees":4,"production":0},"2005-Q3":{"hours":379,"employees":4,"production":0},"2005-Q2":{"hours":372,"employees":4,"production":0},"2005-Q1":{"hours":3,"employees":1,"production":0},"2004-Q4":{"hours":227,"employees":2,"production":0},"2004-Q3":{"hours":429,"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":14,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000":{"hours":519,"employees":3,"production":0},"2001":{"hours":1867,"employees":2,"production":0},"2002":{"hours":773,"employees":3,"production":0},"2003":{"hours":535,"employees":2,"production":0},"2004":{"hours":997,"employees":2,"production":0},"2005":{"hours":1138,"employees":4,"production":0},"2006":{"hours":1279,"employees":5,"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/2102640/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2102640/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":"2102640","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}