{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-17T06:17:15.228Z","identity":{"mine_id":"1302177","name":"Port. Plant #7 & #2 Stripping Crew","status":"Abandoned","status_date":"2004-06-02","mine_type":"Surface","coal_metal":"M","commodity":"Construction Sand and Gravel","state":"IA","county":"Polk","nearest_town":"Des Moines","operator_id":"L16568","operator_name":"Hallett Materials","controller_id":"M06183","controller_name":"CRH PLC","district":"M4","office":"Duluth District","employees":0,"latitude":null,"longitude":null},"coverage":{"contributingSources":9,"registeredSources":20,"sourceRows":46},"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":"2026-10-17T05:35:58.500035+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":"1302177","name":"Port. Plant #7 & #2 Stripping Crew"},"operator":{"type":"operator","id":"L16568","name":"Hallett Materials"},"controller":{"type":"controller","id":"M06183","name":"CRH PLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-17T05:35:58.500035+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06971","name":"Mid America Materials Company"},"object":{"type":"mine","id":"1302177","name":"Port. Plant #7 & #2 Stripping Crew"},"validFrom":"1986-09-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|M06971|1986-09-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L09703","name":"Hallett Materials"},"object":{"type":"mine","id":"1302177","name":"Port. Plant #7 & #2 Stripping Crew"},"validFrom":"1990-04-01","validTo":"1999-03-31","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|L09703|1990-04-01|1999-03-31"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06971","name":"Mid America Materials Company"},"object":{"type":"operator","id":"L09703","name":"Hallett Materials"},"validFrom":"1990-04-01","validTo":"1999-03-31","current":false,"derived":true,"evidenceMineId":"1302177","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|L09703|1990-04-01|M06971|1986-09-01|139776"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"L16568","name":"Hallett Materials"},"object":{"type":"mine","id":"1302177","name":"Port. Plant #7 & #2 Stripping Crew"},"validFrom":"1999-04-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|L16568|1999-04-01|"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M12677","name":"Rasmussen Group Inc"},"object":{"type":"mine","id":"1302177","name":"Port. Plant #7 & #2 Stripping Crew"},"validFrom":"1999-04-01","validTo":"2001-08-10","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|M12677|1999-04-01|2001-08-10"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M12677","name":"Rasmussen Group Inc"},"object":{"type":"operator","id":"L16568","name":"Hallett Materials"},"validFrom":"1999-04-01","validTo":"2001-08-10","current":false,"derived":true,"evidenceMineId":"1302177","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|L16568|1999-04-01|M12677|1999-04-01|154338"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"mine","id":"1302177","name":"Port. Plant #7 & #2 Stripping Crew"},"validFrom":"2001-08-11","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|M06183|2001-08-11|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"M06183","name":"CRH PLC"},"object":{"type":"operator","id":"L16568","name":"Hallett Materials"},"validFrom":"2001-08-11","validTo":null,"current":true,"derived":true,"evidenceMineId":"1302177","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-17T05:35:58.500035+00:00","recordKey":"1302177|L16568|1999-04-01|M06183|2001-08-11|136956"}}],"coverage":{"historyRecords":3,"edgeCount":8,"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":"2004-06-02","lastDate":"2004-06-02","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":6,"firstDate":"2000-12-05","lastDate":"2003-06-10","metrics":{"ss":0,"delinquent":6,"recentRows":0,"paidPenalty":350,"proposedPenalty":350,"currentAssessment":350},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"315782","VIOLATION_NO":"6153607","ISSUE_DT":"06/10/2003","CFR_STANDARD_CD":"62.120","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2003-06-10"},{"SOURCE_ROW_NUMBER":"315781","VIOLATION_NO":"6153606","ISSUE_DT":"06/10/2003","CFR_STANDARD_CD":"62.120","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2003-06-10"},{"SOURCE_ROW_NUMBER":"315780","VIOLATION_NO":"6153605","ISSUE_DT":"06/09/2003","CFR_STANDARD_CD":"56.14132(a)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2003-06-09"},{"SOURCE_ROW_NUMBER":"315779","VIOLATION_NO":"6153604","ISSUE_DT":"06/09/2003","CFR_STANDARD_CD":"56.14132(a)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2003-06-09"},{"SOURCE_ROW_NUMBER":"150308","VIOLATION_NO":"7845886","ISSUE_DT":"10/16/2001","CFR_STANDARD_CD":"56.14132(b)(1)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"55.00","CURRENT_ASSESSMENT_AMT":"55.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2001-10-16"},{"SOURCE_ROW_NUMBER":"64578","VIOLATION_NO":"7814749","ISSUE_DT":"12/05/2000","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":"2000-12-05"}]},{"id":"msha-controller-operator-history","name":"Controller and Operator History","domains":["identity","compliance"],"products":["historical ownership attribution","operator transitions","valid-time joins"],"rowCount":3,"firstDate":"1990-04-01","lastDate":"1999-04-01","metrics":{"recentRows":0,"currentOperatorTenures":2,"completedOperatorTenures":1},"periods":{},"recentRecords":[]},{"id":"msha-inspections","name":"Inspections","domains":["safety","compliance"],"products":["inspection mix","on-site hours","event context","citation rate denominator"],"rowCount":7,"firstDate":"2000-12-05","lastDate":"2003-06-23","metrics":{"inspectors":8,"recentRows":0,"onSiteHours":26,"inspectionHours":44,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"388479","EVENT_NO":"0963720","INSPECTION_BEGIN_DT":"06/23/2003","INSPECTION_END_DT":"06/24/2003","ACTIVITY_CODE":"02","ACTIVITY":"COMPLIANCE FOLLOW-UP INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2003-06-23"},{"SOURCE_ROW_NUMBER":"1009208","EVENT_NO":"0964343","INSPECTION_BEGIN_DT":"06/09/2003","INSPECTION_END_DT":"06/11/2003","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"11","SUM_TOTAL_ON_SITE_HOURS":"10","sourceDate":"2003-06-09"},{"SOURCE_ROW_NUMBER":"904346","EVENT_NO":"0964304","INSPECTION_BEGIN_DT":"02/19/2003","INSPECTION_END_DT":"02/19/2003","ACTIVITY_CODE":"10","ACTIVITY":"ATTEMPTED INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"4","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2003-02-19"},{"SOURCE_ROW_NUMBER":"130011","EVENT_NO":"0964438","INSPECTION_BEGIN_DT":"10/21/2002","INSPECTION_END_DT":"10/21/2002","ACTIVITY_CODE":"46","ACTIVITY":"SPECIAL ENFORCEMENT 4","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"4","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2002-10-21"},{"SOURCE_ROW_NUMBER":"629046","EVENT_NO":"0815390","INSPECTION_BEGIN_DT":"12/19/2001","INSPECTION_END_DT":"12/19/2001","ACTIVITY_CODE":"02","ACTIVITY":"COMPLIANCE FOLLOW-UP INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"3","SUM_TOTAL_ON_SITE_HOURS":"1","sourceDate":"2001-12-19"},{"SOURCE_ROW_NUMBER":"308235","EVENT_NO":"0815742","INSPECTION_BEGIN_DT":"10/15/2001","INSPECTION_END_DT":"10/16/2001","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"3","sourceDate":"2001-10-15"},{"SOURCE_ROW_NUMBER":"887350","EVENT_NO":"0695546","INSPECTION_BEGIN_DT":"12/05/2000","INSPECTION_END_DT":"12/07/2000","ACTIVITY_CODE":"01","ACTIVITY":"REGULAR INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"13","SUM_TOTAL_ON_SITE_HOURS":"7","sourceDate":"2000-12-05"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":12,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2002-Q4":{"hours":3316,"employees":5,"production":0},"2002-Q3":{"hours":3332,"employees":5,"production":0},"2002-Q2":{"hours":3239,"employees":5,"production":0},"2002-Q1":{"hours":2851,"employees":6,"production":0},"2001-Q4":{"hours":2338,"employees":5,"production":0},"2001-Q3":{"hours":3061,"employees":5,"production":0},"2001-Q2":{"hours":4515,"employees":7,"production":0},"2001-Q1":{"hours":2887,"employees":5,"production":0},"2000-Q4":{"hours":2925,"employees":7,"production":0},"2000-Q3":{"hours":2574,"employees":5,"production":0},"2000-Q2":{"hours":2771,"employees":4,"production":0},"2000-Q1":{"hours":1895,"employees":4,"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":5,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2000":{"hours":10165,"employees":5,"production":0},"2001":{"hours":12801,"employees":6,"production":0},"2002":{"hours":12738,"employees":5,"production":0},"2003":{"hours":13334,"employees":6,"production":0},"2004":{"hours":1361,"employees":4,"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":5,"firstDate":"2000-12-06","lastDate":"2003-06-10","metrics":{"recentRows":0,"actionTaken":5,"maxExposureRatio":0,"overExposureLimit":0,"exposureRatioTotal":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"32089","EVENT_NO":"0964343","SAMPLE_NO":"000000200304966000","SAMPLE_DATE":"06/10/2003","CONTAMINANT_DESC":"Unlisted Particulate, respirable, <1% Qtz","CONCENTRATION":"0000.12","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Truck Driver","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2003-06-10"},{"SOURCE_ROW_NUMBER":"32088","EVENT_NO":"0964343","SAMPLE_NO":"000000200304965900","SAMPLE_DATE":"06/10/2003","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Rotary Bucket Ex. Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2003-06-10"},{"SOURCE_ROW_NUMBER":"32087","EVENT_NO":"0964343","SAMPLE_NO":"000000200304965800","SAMPLE_DATE":"06/10/2003","CONTAMINANT_DESC":"Respirable dust, <.1mg","CONCENTRATION":"0000.00","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Bulldozer Operator","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2003-06-10"},{"SOURCE_ROW_NUMBER":"201781","EVENT_NO":"0695546","SAMPLE_NO":"800000200000369400","SAMPLE_DATE":"12/06/2000","CONTAMINANT_DESC":"Unlisted Particulate, respirable, <1% Qtz","CONCENTRATION":"0000.14","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Truck Driver","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2000-12-06"},{"SOURCE_ROW_NUMBER":"201780","EVENT_NO":"0695546","SAMPLE_NO":"800000200000369300","SAMPLE_DATE":"12/06/2000","CONTAMINANT_DESC":"Unlisted  Particulate, total, <1% Qtz","CONCENTRATION":"0000.61","EXPOSURE_LIMIT":"0000.00","C_OVER_E":"00.00","JOB_CD_DESC":"Truck Driver","ACTION_TAKEN_DESC":"NO ACTION","sourceDate":"2000-12-06"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":6,"firstDate":"2000-12-05","lastDate":"2003-06-10","metrics":{"ss":0,"amountDue":350,"contested":0,"amountPaid":350,"recentRows":0,"section104d":0,"unterminated":0,"proposedPenalty":350},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"669742","VIOLATION_NO":"6153607","VIOLATION_ISSUE_DT":"06/10/2003","SIG_SUB":"N","PART_SECTION":"62.120","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"06/24/2003","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2003-06-10"},{"SOURCE_ROW_NUMBER":"669741","VIOLATION_NO":"6153606","VIOLATION_ISSUE_DT":"06/10/2003","SIG_SUB":"N","PART_SECTION":"62.120","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"06/24/2003","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2003-06-10"},{"SOURCE_ROW_NUMBER":"669740","VIOLATION_NO":"6153605","VIOLATION_ISSUE_DT":"06/09/2003","SIG_SUB":"N","PART_SECTION":"56.14132(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"06/10/2003","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2003-06-09"},{"SOURCE_ROW_NUMBER":"669739","VIOLATION_NO":"6153604","VIOLATION_ISSUE_DT":"06/09/2003","SIG_SUB":"N","PART_SECTION":"56.14132(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"06/10/2003","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2003-06-09"},{"SOURCE_ROW_NUMBER":"669743","VIOLATION_NO":"7845886","VIOLATION_ISSUE_DT":"10/16/2001","SIG_SUB":"N","PART_SECTION":"56.14132(b)(1)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"12/19/2001","PROPOSED_PENALTY":"55","AMOUNT_DUE":"55","AMOUNT_PAID":"55","CONTESTED_IND":"N","sourceDate":"2001-10-16"},{"SOURCE_ROW_NUMBER":"669744","VIOLATION_NO":"7814749","VIOLATION_ISSUE_DT":"12/05/2000","SIG_SUB":"N","PART_SECTION":"56.1000","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"0","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"12/05/2000","PROPOSED_PENALTY":"55","AMOUNT_DUE":"55","AMOUNT_PAID":"55","CONTESTED_IND":"N","sourceDate":"2000-12-05"}]}],"safety":{"href":"/api/v1/mines/1302177/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/1302177/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":"Action level.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.120","part":"62","subchapter":"M","subpart":"","id":"62.120","citation":"30 CFR 62.120","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER M—UNIFORM MINE HEALTH REGULATIONS","partHeading":"PART 62—OCCUPATIONAL NOISE EXPOSURE","subpartHeading":"","text":null,"occurrenceCount":2},{"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":3},{"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":"1302177","dataSource":"postgres","snapshotId":"2026-10-17T05:35:58.500035+00:00","completedAt":"2026-10-17T06:17:15.228Z","sourceCount":20,"totalRows":15450873}}