{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"2402145","name":"Small Portable Screen","status":"Abandoned","status_date":"2024-04-24","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"MT","county":"Missoula","nearest_town":"Missoula","operator_id":"L17688","operator_name":"Knife River Missoula","controller_id":"0176802","controller_name":"Knife River Corporation","district":"M6","office":"Helena MT Field Office","employees":0,"latitude":46.872222,"longitude":-113.993889},"coverage":{"contributingSources":9,"registeredSources":20,"sourceRows":149},"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":"2402145","name":"Small Portable Screen"},"operator":{"type":"operator","id":"L17688","name":"Knife River Missoula"},"controller":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"L15947","name":"A-1 Paving Inc"},"object":{"type":"mine","id":"2402145","name":"Small Portable Screen"},"validFrom":"1998-07-01","validTo":"2001-11-15","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|L15947|1998-07-01|2001-11-15"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12162","name":"Kevin M  Mohl  et al"},"object":{"type":"mine","id":"2402145","name":"Small Portable Screen"},"validFrom":"1998-07-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|M12162|1998-07-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12162","name":"Kevin M  Mohl  et al"},"object":{"type":"operator","id":"L15947","name":"A-1 Paving Inc"},"validFrom":"1998-07-01","validTo":"2001-11-15","current":false,"derived":true,"evidenceMineId":"2402145","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|L15947|1998-07-01|M12162|1998-07-01|153207"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12162","name":"Arnie A  Mohl  et al"},"object":{"type":"operator","id":"L15947","name":"A-1 Paving Inc"},"validFrom":"1998-07-01","validTo":"2001-11-15","current":false,"derived":true,"evidenceMineId":"2402145","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|L15947|1998-07-01|M12162|1998-07-01|153208"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"mine","id":"2402145","name":"Small Portable Screen"},"validFrom":"1999-09-01","validTo":"2023-05-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|M09717|1999-09-01|2023-05-31"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L17688","name":"Knife River Missoula"},"object":{"type":"mine","id":"2402145","name":"Small Portable Screen"},"validFrom":"2001-11-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|L17688|2001-11-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M09717","name":"MDU Resources Group Inc"},"object":{"type":"operator","id":"L17688","name":"Knife River Missoula"},"validFrom":"2001-11-16","validTo":"2023-05-31","current":false,"derived":true,"evidenceMineId":"2402145","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|L17688|2001-11-16|M09717|1999-09-01|147132"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"object":{"type":"mine","id":"2402145","name":"Small Portable Screen"},"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":"2402145|0176802|2023-06-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0176802","name":"Knife River Corporation"},"object":{"type":"operator","id":"L17688","name":"Knife River Missoula"},"validFrom":"2023-06-01","validTo":null,"current":true,"derived":true,"evidenceMineId":"2402145","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"2402145|L17688|2001-11-16|0176802|2023-06-01|37793"}}],"coverage":{"historyRecords":4,"edgeCount":9,"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":"2024-04-24","lastDate":"2024-04-24","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":3,"firstDate":"2001-08-15","lastDate":"2005-02-01","metrics":{"ss":0,"delinquent":3,"recentRows":0,"paidPenalty":170,"proposedPenalty":170,"currentAssessment":170},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"468248","VIOLATION_NO":"6271583","ISSUE_DT":"02/01/2005","CFR_STANDARD_CD":"56.18002(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":"2005-02-01"},{"SOURCE_ROW_NUMBER":"117664","VIOLATION_NO":"6268187","ISSUE_DT":"11/14/2001","CFR_STANDARD_CD":"56.14107(a)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"55.00","CURRENT_ASSESSMENT_AMT":"55.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2001-11-14"},{"SOURCE_ROW_NUMBER":"50708","VIOLATION_NO":"6267682","ISSUE_DT":"08/15/2001","CFR_STANDARD_CD":"56.1000","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"55.00","CURRENT_ASSESSMENT_AMT":"55.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2001-08-15"}]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":4,"firstDate":"1998-07-01","lastDate":"2001-11-16","metrics":{"recentRows":0,"currentOperatorTenures":2,"completedOperatorTenures":2},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":9,"firstDate":"2001-08-15","lastDate":"2011-07-06","metrics":{"inspectors":10,"recentRows":0,"onSiteHours":33.5,"inspectionHours":81.75,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"59598","EVENT_NO":"6557113","INSPECTION_BEGIN_DT":"07/06/2011","INSPECTION_END_DT":"07/06/2011","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"12","SUM_TOTAL_ON_SITE_HOURS":"3.5","sourceDate":"2011-07-06"},{"SOURCE_ROW_NUMBER":"830821","EVENT_NO":"1106620","INSPECTION_BEGIN_DT":"09/21/2010","INSPECTION_END_DT":"09/21/2010","ACTIVITY_CODE":"E16","ACTIVITY":"Spot Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"15.75","SUM_TOTAL_ON_SITE_HOURS":"9.5","sourceDate":"2010-09-21"},{"SOURCE_ROW_NUMBER":"296719","EVENT_NO":"1103954","INSPECTION_BEGIN_DT":"10/21/2009","INSPECTION_END_DT":"10/21/2009","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"7","SUM_TOTAL_ON_SITE_HOURS":"1.5","sourceDate":"2009-10-21"},{"SOURCE_ROW_NUMBER":"976884","EVENT_NO":"1070456","INSPECTION_BEGIN_DT":"02/01/2005","INSPECTION_END_DT":"02/01/2005","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"12","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2005-02-01"},{"SOURCE_ROW_NUMBER":"955182","EVENT_NO":"1079827","INSPECTION_BEGIN_DT":"04/27/2004","INSPECTION_END_DT":"04/27/2004","ACTIVITY_CODE":"40","ACTIVITY":"SPECIAL ENFORCEMENT 1","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2004-04-27"},{"SOURCE_ROW_NUMBER":"1030425","EVENT_NO":"1070132","INSPECTION_BEGIN_DT":"04/22/2004","INSPECTION_END_DT":"04/22/2004","ACTIVITY_CODE":"16","ACTIVITY":"PART 50 AUDIT","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2004-04-22"},{"SOURCE_ROW_NUMBER":"276656","EVENT_NO":"1070123","INSPECTION_BEGIN_DT":"04/13/2004","INSPECTION_END_DT":"04/13/2004","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"20","SUM_TOTAL_ON_SITE_HOURS":"8","sourceDate":"2004-04-13"},{"SOURCE_ROW_NUMBER":"1159948","EVENT_NO":"0772779","INSPECTION_BEGIN_DT":"11/14/2001","INSPECTION_END_DT":"11/15/2001","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"9","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2001-11-14"},{"SOURCE_ROW_NUMBER":"866945","EVENT_NO":"0660225","INSPECTION_BEGIN_DT":"08/15/2001","INSPECTION_END_DT":"08/15/2001","ACTIVITY_CODE":"10","ACTIVITY":"ATTEMPTED INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2001-08-15"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":112,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2024-Q2":{"hours":0,"employees":0,"production":0},"2024-Q1":{"hours":0,"employees":0,"production":0},"2023-Q4":{"hours":0,"employees":0,"production":0},"2023-Q3":{"hours":0,"employees":0,"production":0},"2023-Q2":{"hours":0,"employees":0,"production":0},"2023-Q1":{"hours":0,"employees":0,"production":0},"2022-Q4":{"hours":0,"employees":0,"production":0},"2022-Q3":{"hours":0,"employees":0,"production":0},"2022-Q2":{"hours":0,"employees":0,"production":0},"2022-Q1":{"hours":0,"employees":0,"production":0},"2021-Q4":{"hours":0,"employees":0,"production":0},"2021-Q3":{"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":15,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2001":{"hours":1241,"employees":4,"production":0},"2002":{"hours":1061,"employees":3,"production":0},"2003":{"hours":506,"employees":4,"production":0},"2004":{"hours":465,"employees":3,"production":0},"2005":{"hours":2512,"employees":7,"production":0},"2006":{"hours":338,"employees":4,"production":0},"2009":{"hours":88,"employees":1,"production":0},"2010":{"hours":368,"employees":2,"production":0},"2011":{"hours":181,"employees":1,"production":0},"2015":{"hours":263,"employees":7,"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":"2010-09-21","lastDate":"2010-09-21","metrics":{"recentRows":0,"actionTaken":1,"maxExposureRatio":0,"overExposureLimit":0,"exposureRatioTotal":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"145994","EVENT_NO":"1106620","SAMPLE_NO":"000000201009103200","SAMPLE_DATE":"09/21/2010","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":"2010-09-21"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":3,"firstDate":"2001-08-15","lastDate":"2005-02-01","metrics":{"ss":0,"amountDue":170,"contested":0,"amountPaid":170,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":170},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1479427","VIOLATION_NO":"6271583","VIOLATION_ISSUE_DT":"02/01/2005","SIG_SUB":"N","PART_SECTION":"56.18002(b)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"0","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"02/01/2005","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2005-02-01"},{"SOURCE_ROW_NUMBER":"1479429","VIOLATION_NO":"6268187","VIOLATION_ISSUE_DT":"11/14/2001","SIG_SUB":"N","PART_SECTION":"56.14107(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/15/2001","PROPOSED_PENALTY":"55","AMOUNT_DUE":"55","AMOUNT_PAID":"55","CONTESTED_IND":"N","sourceDate":"2001-11-14"},{"SOURCE_ROW_NUMBER":"1479428","VIOLATION_NO":"6267682","VIOLATION_ISSUE_DT":"08/15/2001","SIG_SUB":"N","PART_SECTION":"56.1000","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"08/15/2001","PROPOSED_PENALTY":"55","AMOUNT_DUE":"55","AMOUNT_PAID":"55","CONTESTED_IND":"N","sourceDate":"2001-08-15"}]}],"safety":{"href":"/api/v1/mines/2402145/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/2402145/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":"Examination of working places.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002","part":"56","subchapter":"K","subpart":"Q","id":"56.18002","citation":"30 CFR 56.18002","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":"Moving machine parts.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107","part":"56","subchapter":"K","subpart":"M","id":"56.14107","citation":"30 CFR 56.14107","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":"Notification of commencement of operations and closing of mines.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000","part":"56","subchapter":"K","subpart":"A","id":"56.1000","citation":"30 CFR 56.1000","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":"2402145","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}