{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"3304775","name":"Keestrack Frontier Screen","status":"Temporarily Idled","status_date":"2026-03-23","mine_type":"Surface","coal_metal":"M","commodity":"Lime","state":"OH","county":"Hancock","nearest_town":"Vanlue","operator_id":"0182613","operator_name":"NLS Asphalt, Inc.","controller_id":"M00255","controller_name":"National Lime & Stone Co.","district":"M2","office":"Hebron OH Field Office","employees":2,"latitude":40.265833,"longitude":-81.652778},"coverage":{"contributingSources":12,"registeredSources":20,"sourceRows":30},"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":"3304775","name":"Keestrack Frontier Screen"},"operator":{"type":"operator","id":"0182613","name":"NLS Asphalt, Inc."},"controller":{"type":"controller","id":"M00255","name":"National Lime & Stone Co."},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00255","name":"National Lime & Stone Co."},"object":{"type":"mine","id":"3304775","name":"Keestrack Frontier Screen"},"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":"3304775|M00255|1950-01-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M00255","name":"National Lime & Stone Co."},"object":{"type":"mine","id":"3304775","name":"Keestrack Frontier Screen"},"validFrom":"2022-04-28","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304775|M00255|2022-04-28|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L00317","name":"The National Lime and Stone Company"},"object":{"type":"mine","id":"3304775","name":"Keestrack Frontier Screen"},"validFrom":"2022-05-03","validTo":"2025-12-08","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304775|L00317|2022-05-03|2025-12-08"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00255","name":"National Lime & Stone Co."},"object":{"type":"operator","id":"L00317","name":"The National Lime and Stone Company"},"validFrom":"2022-05-03","validTo":"2025-12-08","current":false,"derived":true,"evidenceMineId":"3304775","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304775|L00317|2022-05-03|M00255|1950-01-01|108462"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0182613","name":"NLS Asphalt, Inc."},"object":{"type":"mine","id":"3304775","name":"Keestrack Frontier Screen"},"validFrom":"2025-12-09","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304775|0182613|2025-12-09|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M00255","name":"National Lime & Stone Co."},"object":{"type":"operator","id":"0182613","name":"NLS Asphalt, Inc."},"validFrom":"2025-12-09","validTo":null,"current":true,"derived":true,"evidenceMineId":"3304775","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"3304775|0182613|2025-12-09|M00255|2022-04-28|108472"}}],"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":"2026-03-23","lastDate":"2026-03-23","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":"2022-08-15","lastDate":"2025-10-08","metrics":{"ss":0,"delinquent":2,"recentRows":3,"paidPenalty":284,"proposedPenalty":435,"currentAssessment":284},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"2977915","VIOLATION_NO":"5070970","ISSUE_DT":"10/08/2025","CFR_STANDARD_CD":"46.3(a)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"151.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2025-10-08"},{"SOURCE_ROW_NUMBER":"2977914","VIOLATION_NO":"5070968","ISSUE_DT":"10/08/2025","CFR_STANDARD_CD":"46.9(c)(4)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"151.00","CURRENT_ASSESSMENT_AMT":"0.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2025-10-08"},{"SOURCE_ROW_NUMBER":"2725273","VIOLATION_NO":"9666495","ISSUE_DT":"08/15/2022","CFR_STANDARD_CD":"56.1000","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"133.00","CURRENT_ASSESSMENT_AMT":"133.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2022-08-15"}]},{"id":"msha-civil-penalty-dockets-decisions","name":"Civil Penalty Dockets and Decisions","domains":["compliance","legal"],"products":["docket lineage","decision outcomes","citation packet precedent"],"rowCount":1,"firstDate":"2026-02-05","lastDate":"2026-02-05","metrics":{"appeals":0,"decisions":1,"recentRows":1,"decisionPenalty":0,"originalPenalty":151},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"167904","VIOLATION_NO":"5070968","DOCKET_NO":"LAKE 2026-0019","DECISION_DT":"02/05/2026","DECISION_TYPE_CODE_DESC":"Dismissal","ORIGINAL_PENALTY_AMT":"151.00","DECISION_PENALTY_AMT":"0.00","JUDGE_FIRST_NAME":"N/A","sourceDate":"2026-02-05"}]},{"id":"msha-contested-violations","name":"Contested Violations","domains":["compliance","legal"],"products":["contest status","time to resolution","contested-rate context"],"rowCount":1,"firstDate":"2025-10-08","lastDate":"2025-10-08","metrics":{"decisions":1,"ssChanged":1,"recentRows":1,"decisionPenalty":0,"proposedPenalty":151},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"221698","CITATION_NO":"5070968","CITATION_ISSUE_DT":"10/08/2025","DOCKET_NO":"LAKE 2026-0019","DECISION_DT":"02/05/2026","CFR_STANDARD_CODE":"46.9(c)(4)","ORIGINAL_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"151.00","DECISION_PENALTY_AMT":".00","sourceDate":"2025-10-08"}]},{"id":"msha-contractor-production-quarterly","name":"Contractor Employment and Production — Quarterly","domains":["contractors","production","safety"],"products":["contractor exposure denominator","productivity","presence windows"],"rowCount":5,"firstDate":null,"lastDate":null,"metrics":{"linkedContractors":1,"notMineAttributable":1},"periods":{},"recentRecords":[]},{"id":"msha-contractor-production-yearly","name":"Contractor Employment and Production — Yearly","domains":["contractors","production","safety"],"products":["long-run contractor trend","annual denominator reconciliation"],"rowCount":3,"firstDate":null,"lastDate":null,"metrics":{"linkedContractors":1,"notMineAttributable":1},"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":2,"firstDate":"2022-05-03","lastDate":"2025-12-09","metrics":{"recentRows":2,"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":2,"firstDate":"2022-08-15","lastDate":"2025-10-08","metrics":{"inspectors":2,"recentRows":2,"onSiteHours":9,"inspectionHours":17.25,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"142432","EVENT_NO":"F016B33","INSPECTION_BEGIN_DT":"10/08/2025","INSPECTION_END_DT":"10/14/2025","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"15.75","SUM_TOTAL_ON_SITE_HOURS":"9","sourceDate":"2025-10-08"},{"SOURCE_ROW_NUMBER":"558939","EVENT_NO":"6923013","INSPECTION_BEGIN_DT":"08/15/2022","INSPECTION_END_DT":"08/15/2022","ACTIVITY_CODE":"E28","ACTIVITY":"Mine Idle Activity","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"1.5","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2022-08-15"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":5,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2025-Q4":{"hours":20,"employees":1,"production":0},"2025-Q3":{"hours":474,"employees":1,"production":0},"2024-Q4":{"hours":60,"employees":1,"production":0},"2022-Q3":{"hours":60,"employees":1,"production":0},"2022-Q2":{"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":3,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2022":{"hours":60,"employees":1,"production":0},"2024":{"hours":60,"employees":1,"production":0},"2025":{"hours":494,"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-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":3,"firstDate":"2022-08-15","lastDate":"2025-10-08","metrics":{"ss":0,"amountDue":284,"contested":0,"amountPaid":284,"recentRows":3,"section104d":0,"unterminated":0,"proposedPenalty":435},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1776833","VIOLATION_NO":"5070970","VIOLATION_ISSUE_DT":"10/08/2025","SIG_SUB":"N","PART_SECTION":"46.3(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"0","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"10/14/2025","PROPOSED_PENALTY":"151","AMOUNT_DUE":"151","AMOUNT_PAID":"151","CONTESTED_IND":"N","sourceDate":"2025-10-08"},{"SOURCE_ROW_NUMBER":"1776832","VIOLATION_NO":"5070968","VIOLATION_ISSUE_DT":"10/08/2025","SIG_SUB":"N","PART_SECTION":"46.9(c)(4)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"10/14/2025","PROPOSED_PENALTY":"151","AMOUNT_DUE":"0","AMOUNT_PAID":"0","CONTESTED_IND":"N","sourceDate":"2025-10-08"},{"SOURCE_ROW_NUMBER":"1776831","VIOLATION_NO":"9666495","VIOLATION_ISSUE_DT":"08/15/2022","SIG_SUB":"N","PART_SECTION":"56.1000","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"1","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"08/15/2022","PROPOSED_PENALTY":"133","AMOUNT_DUE":"133","AMOUNT_PAID":"133","CONTESTED_IND":"N","sourceDate":"2022-08-15"}]}],"safety":{"href":"/api/v1/mines/3304775/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/3304775/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":"Training plans.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3","part":"46","subchapter":"H","subpart":"","id":"46.3","citation":"30 CFR 46.3","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER H—EDUCATION AND TRAINING","partHeading":"PART 46—TRAINING AND RETRAINING OF MINERS ENGAGED IN SHELL DREDGING OR EMPLOYED AT SAND, GRAVEL, SURFACE STONE, SURFACE CLAY, COLLOIDAL PHOSPHATE, OR SURFACE LIMESTONE MINES.","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","heading":"Records of training.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9","part":"46","subchapter":"H","subpart":"","id":"46.9","citation":"30 CFR 46.9","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER H—EDUCATION AND TRAINING","partHeading":"PART 46—TRAINING AND RETRAINING OF MINERS ENGAGED IN SHELL DREDGING OR EMPLOYED AT SAND, GRAVEL, SURFACE STONE, SURFACE CLAY, COLLOIDAL PHOSPHATE, OR SURFACE LIMESTONE 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":"3304775","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}