{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4703305","name":"Plant #75","status":"Intermittent","status_date":"2023-10-04","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"WI","county":"Richland","nearest_town":"Richland Center","operator_id":"L16472","operator_name":"Milestone Materials Div/Mathy Construction Co","controller_id":"M00893","controller_name":"Mathy Construction Company","district":"M4","office":"Peru IL Field Office","employees":1,"latitude":46.604167,"longitude":-91.983611},"coverage":{"contributingSources":9,"registeredSources":20,"sourceRows":69},"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":"4703305","name":"Plant #75"},"operator":{"type":"operator","id":"L16472","name":"Milestone Materials Div/Mathy Construction Co"},"controller":{"type":"controller","id":"M00893","name":"Mathy Construction Company"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00893","name":"Mathy Construction Company"},"object":{"type":"mine","id":"4703305","name":"Plant #75"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4703305|M00893|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M11376","name":"William J  Kraemer et al"},"object":{"type":"mine","id":"4703305","name":"Plant #75"},"validFrom":"1996-08-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4703305|M11376|1996-08-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L14949","name":"The Kraemer Company, LLC"},"object":{"type":"mine","id":"4703305","name":"Plant #75"},"validFrom":"2002-05-07","validTo":"2020-12-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4703305|L14949|2002-05-07|2020-12-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M11376","name":"William J  Kraemer et al"},"object":{"type":"operator","id":"L14949","name":"The Kraemer Company, LLC"},"validFrom":"2002-05-07","validTo":"2020-12-21","current":false,"derived":true,"evidenceMineId":"4703305","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4703305|L14949|2002-05-07|M11376|1996-08-01|151285"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16472","name":"Milestone Materials Div/Mathy Construction Co"},"object":{"type":"mine","id":"4703305","name":"Plant #75"},"validFrom":"2020-12-22","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4703305|L16472|2020-12-22|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00893","name":"Mathy Construction Company"},"object":{"type":"operator","id":"L16472","name":"Milestone Materials Div/Mathy Construction Co"},"validFrom":"2020-12-22","validTo":null,"current":true,"derived":true,"evidenceMineId":"4703305","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4703305|L16472|2020-12-22|M00893|1950-01-01|115754"}}],"coverage":{"historyRecords":2,"edgeCount":6,"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":"2023-10-04","lastDate":"2023-10-04","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":"2002-05-07","lastDate":"2002-05-07","metrics":{"ss":0,"delinquent":1,"recentRows":0,"paidPenalty":55,"proposedPenalty":55,"currentAssessment":55},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"321689","VIOLATION_NO":"6135769","ISSUE_DT":"05/07/2002","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":"2002-05-07"}]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":2,"firstDate":"2002-05-07","lastDate":"2020-12-22","metrics":{"recentRows":0,"currentOperatorTenures":1,"completedOperatorTenures":1},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":9,"firstDate":"2002-05-07","lastDate":"2025-10-02","metrics":{"inspectors":9,"recentRows":7,"onSiteHours":18.75,"inspectionHours":50.75,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"70079","EVENT_NO":"6906622","INSPECTION_BEGIN_DT":"10/02/2025","INSPECTION_END_DT":"10/02/2025","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"12","SUM_TOTAL_ON_SITE_HOURS":"1.5","sourceDate":"2025-10-02"},{"SOURCE_ROW_NUMBER":"947276","EVENT_NO":"F02526F","INSPECTION_BEGIN_DT":"09/23/2025","INSPECTION_END_DT":"09/24/2025","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8","SUM_TOTAL_ON_SITE_HOURS":"5","sourceDate":"2025-09-23"},{"SOURCE_ROW_NUMBER":"45320","EVENT_NO":"6907628","INSPECTION_BEGIN_DT":"08/14/2025","INSPECTION_END_DT":"08/14/2025","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4.25","SUM_TOTAL_ON_SITE_HOURS":".5","sourceDate":"2025-08-14"},{"SOURCE_ROW_NUMBER":"188831","EVENT_NO":"F016C80","INSPECTION_BEGIN_DT":"09/03/2024","INSPECTION_END_DT":"09/03/2024","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2","SUM_TOTAL_ON_SITE_HOURS":"1.25","sourceDate":"2024-09-03"},{"SOURCE_ROW_NUMBER":"140119","EVENT_NO":"6909710","INSPECTION_BEGIN_DT":"08/22/2023","INSPECTION_END_DT":"08/22/2023","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2.25","SUM_TOTAL_ON_SITE_HOURS":".75","sourceDate":"2023-08-22"},{"SOURCE_ROW_NUMBER":"671706","EVENT_NO":"6905635","INSPECTION_BEGIN_DT":"08/17/2022","INSPECTION_END_DT":"08/17/2022","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"3.25","SUM_TOTAL_ON_SITE_HOURS":".75","sourceDate":"2022-08-17"},{"SOURCE_ROW_NUMBER":"629536","EVENT_NO":"6840883","INSPECTION_BEGIN_DT":"09/28/2021","INSPECTION_END_DT":"09/28/2021","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"7","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2021-09-28"},{"SOURCE_ROW_NUMBER":"557719","EVENT_NO":"0970945","INSPECTION_BEGIN_DT":"09/09/2003","INSPECTION_END_DT":"09/09/2003","ACTIVITY_CODE":"10","ACTIVITY":"ATTEMPTED INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"3","sourceDate":"2003-09-09"},{"SOURCE_ROW_NUMBER":"268743","EVENT_NO":"0969161","INSPECTION_BEGIN_DT":"05/07/2002","INSPECTION_END_DT":"05/08/2002","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"7","SUM_TOTAL_ON_SITE_HOURS":"5","sourceDate":"2002-05-07"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":42,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2026-Q2":{"hours":1,"employees":1,"production":0},"2026-Q1":{"hours":1,"employees":1,"production":0},"2025-Q4":{"hours":525,"employees":1,"production":0},"2025-Q3":{"hours":1613,"employees":2,"production":0},"2025-Q2":{"hours":1784,"employees":2,"production":0},"2025-Q1":{"hours":1,"employees":1,"production":0},"2024-Q4":{"hours":1,"employees":1,"production":0},"2024-Q3":{"hours":1,"employees":1,"production":0},"2024-Q2":{"hours":1,"employees":1,"production":0},"2024-Q1":{"hours":1,"employees":1,"production":0},"2023-Q4":{"hours":1,"employees":1,"production":0},"2023-Q3":{"hours":1,"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":11,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2002":{"hours":449,"employees":1,"production":0},"2021":{"hours":768,"employees":2,"production":0},"2022":{"hours":76,"employees":2,"production":0},"2023":{"hours":4,"employees":1,"production":0},"2024":{"hours":4,"employees":1,"production":0},"2025":{"hours":3923,"employees":3,"production":0},"2026":{"hours":2,"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":"2025-09-24","lastDate":"2025-09-24","metrics":{"recentRows":1,"actionTaken":1,"maxExposureRatio":0,"overExposureLimit":0,"exposureRatioTotal":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"305006","EVENT_NO":"F02526F","SAMPLE_NO":"000000202504194800","SAMPLE_DATE":"09/24/2025","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":"2025-09-24"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":1,"firstDate":"2002-05-07","lastDate":"2002-05-07","metrics":{"ss":0,"amountDue":55,"contested":0,"amountPaid":55,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":55},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"3024359","VIOLATION_NO":"6135769","VIOLATION_ISSUE_DT":"05/07/2002","SIG_SUB":"N","PART_SECTION":"56.14107(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"05/08/2002","PROPOSED_PENALTY":"55","AMOUNT_DUE":"55","AMOUNT_PAID":"55","CONTESTED_IND":"N","sourceDate":"2002-05-07"}]}],"safety":{"href":"/api/v1/mines/4703305/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4703305/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":"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}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"4703305","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}