{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-18T09:31:49.615Z","identity":{"mine_id":"2103421","name":"Munsterteiger Pit","status":"Intermittent","status_date":"2004-04-27","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MN","county":"Wright","nearest_town":"Buffalo","operator_id":"0052457","operator_name":"Fred Bonk","controller_id":"M33383","controller_name":"Fred  Bonk","district":"M4","office":"Duluth MN Field Office","employees":1,"latitude":45.130555,"longitude":-93.945555},"coverage":{"contributingSources":9,"registeredSources":20,"sourceRows":145},"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":"2103421","name":"Munsterteiger Pit"},"operator":{"type":"operator","id":"0052457","name":"Fred Bonk"},"controller":{"type":"controller","id":"M33383","name":"Fred  Bonk"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-18T09:31:49.615908+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"0052457","name":"Fred Bonk"},"object":{"type":"mine","id":"2103421","name":"Munsterteiger Pit"},"validFrom":"2004-04-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2103421|0052457|2004-04-27|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M33383","name":"Fred  Bonk"},"object":{"type":"mine","id":"2103421","name":"Munsterteiger Pit"},"validFrom":"2004-04-27","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2103421|M33383|2004-04-27|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M33383","name":"Fred  Bonk"},"object":{"type":"operator","id":"0052457","name":"Fred Bonk"},"validFrom":"2004-04-27","validTo":null,"current":true,"derived":true,"evidenceMineId":"2103421","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-18T09:31:49.615908+00:00","recordKey":"2103421|0052457|2004-04-27|M33383|2004-04-27|162007"}}],"coverage":{"historyRecords":1,"edgeCount":3,"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":"2004-04-27","lastDate":"2004-04-27","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":"2013-06-26","lastDate":"2013-06-26","metrics":{"ss":0,"delinquent":1,"recentRows":0,"paidPenalty":100,"proposedPenalty":100,"currentAssessment":100},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"2267473","VIOLATION_NO":"8738186","ISSUE_DT":"06/26/2013","CFR_STANDARD_CD":"56.14132(a)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"100.00","CURRENT_ASSESSMENT_AMT":"100.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2013-06-26"}]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":1,"firstDate":"2004-04-27","lastDate":"2004-04-27","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":0},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":27,"firstDate":"2004-05-19","lastDate":"2026-05-21","metrics":{"inspectors":27,"recentRows":6,"onSiteHours":52,"inspectionHours":140,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"969287","EVENT_NO":"F0381EA","INSPECTION_BEGIN_DT":"05/21/2026","INSPECTION_END_DT":"05/21/2026","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4.75","SUM_TOTAL_ON_SITE_HOURS":"2.5","sourceDate":"2026-05-21"},{"SOURCE_ROW_NUMBER":"173507","EVENT_NO":"F014B37","INSPECTION_BEGIN_DT":"11/06/2024","INSPECTION_END_DT":"11/06/2024","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"3.5","SUM_TOTAL_ON_SITE_HOURS":"2.5","sourceDate":"2024-11-06"},{"SOURCE_ROW_NUMBER":"504083","EVENT_NO":"6907560","INSPECTION_BEGIN_DT":"10/31/2023","INSPECTION_END_DT":"10/31/2023","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"6","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2023-10-31"},{"SOURCE_ROW_NUMBER":"822386","EVENT_NO":"6906457","INSPECTION_BEGIN_DT":"11/22/2022","INSPECTION_END_DT":"11/22/2022","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2.5","SUM_TOTAL_ON_SITE_HOURS":"1.5","sourceDate":"2022-11-22"},{"SOURCE_ROW_NUMBER":"666919","EVENT_NO":"6901815","INSPECTION_BEGIN_DT":"06/22/2022","INSPECTION_END_DT":"06/22/2022","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"3.5","SUM_TOTAL_ON_SITE_HOURS":"3","sourceDate":"2022-06-22"},{"SOURCE_ROW_NUMBER":"1080596","EVENT_NO":"6901042","INSPECTION_BEGIN_DT":"05/05/2021","INSPECTION_END_DT":"05/05/2021","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4.25","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2021-05-05"},{"SOURCE_ROW_NUMBER":"600637","EVENT_NO":"6837756","INSPECTION_BEGIN_DT":"06/23/2020","INSPECTION_END_DT":"06/23/2020","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"3","SUM_TOTAL_ON_SITE_HOURS":"1.75","sourceDate":"2020-06-23"},{"SOURCE_ROW_NUMBER":"54083","EVENT_NO":"6708139","INSPECTION_BEGIN_DT":"10/29/2018","INSPECTION_END_DT":"10/30/2018","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8.5","SUM_TOTAL_ON_SITE_HOURS":"2.25","sourceDate":"2018-10-29"},{"SOURCE_ROW_NUMBER":"3258","EVENT_NO":"6743655","INSPECTION_BEGIN_DT":"11/02/2017","INSPECTION_END_DT":"11/03/2017","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"15.25","SUM_TOTAL_ON_SITE_HOURS":"12","sourceDate":"2017-11-02"},{"SOURCE_ROW_NUMBER":"587169","EVENT_NO":"6708168","INSPECTION_BEGIN_DT":"11/22/2016","INSPECTION_END_DT":"11/22/2016","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2016-11-22"},{"SOURCE_ROW_NUMBER":"165657","EVENT_NO":"6708643","INSPECTION_BEGIN_DT":"05/23/2016","INSPECTION_END_DT":"05/23/2016","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2016-05-23"},{"SOURCE_ROW_NUMBER":"100541","EVENT_NO":"6637563","INSPECTION_BEGIN_DT":"08/26/2015","INSPECTION_END_DT":"08/26/2015","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"6.75","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2015-08-26"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":89,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2026-Q2":{"hours":220,"employees":1,"production":0},"2026-Q1":{"hours":100,"employees":1,"production":0},"2025-Q4":{"hours":500,"employees":1,"production":0},"2025-Q3":{"hours":650,"employees":1,"production":0},"2025-Q2":{"hours":600,"employees":1,"production":0},"2025-Q1":{"hours":300,"employees":1,"production":0},"2024-Q4":{"hours":450,"employees":1,"production":0},"2024-Q3":{"hours":650,"employees":1,"production":0},"2024-Q2":{"hours":700,"employees":1,"production":0},"2024-Q1":{"hours":100,"employees":1,"production":0},"2023-Q4":{"hours":500,"employees":1,"production":0},"2023-Q3":{"hours":650,"employees":1,"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":23,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2017":{"hours":2100,"employees":1,"production":0},"2018":{"hours":1950,"employees":1,"production":0},"2019":{"hours":1970,"employees":1,"production":0},"2020":{"hours":2230,"employees":1,"production":0},"2021":{"hours":2000,"employees":1,"production":0},"2022":{"hours":1770,"employees":1,"production":0},"2023":{"hours":1850,"employees":1,"production":0},"2024":{"hours":1900,"employees":1,"production":0},"2025":{"hours":2050,"employees":1,"production":0},"2026":{"hours":320,"employees":1,"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":1,"firstDate":"2017-11-03","lastDate":"2017-11-03","metrics":{"recentRows":0,"actionTaken":1,"maxExposureRatio":0,"overExposureLimit":0,"exposureRatioTotal":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"217588","EVENT_NO":"6743655","SAMPLE_NO":"000000201706417400","SAMPLE_DATE":"11/03/2017","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Front-end Loader Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2017-11-03"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":1,"firstDate":"2013-06-26","lastDate":"2013-06-26","metrics":{"ss":0,"amountDue":100,"contested":0,"amountPaid":100,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":100},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1378866","VIOLATION_NO":"8738186","VIOLATION_ISSUE_DT":"06/26/2013","SIG_SUB":"N","PART_SECTION":"56.14132(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"07/10/2013","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2013-06-26"}]}],"safety":{"href":"/api/v1/mines/2103421/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2103421/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":"Horns and backup alarms.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132","part":"56","subchapter":"K","subpart":"M","id":"56.14132","citation":"30 CFR 56.14132","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":"2103421","dataSource":"postgres","snapshotId":"2026-10-18T09:31:49.615908+00:00","completedAt":"2026-10-18T09:31:49.615Z","sourceCount":20,"totalRows":17915666}}