{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4608960","name":"Mine No. 4","status":"Abandoned and Sealed","status_date":"2004-10-04","mine_type":"Underground","coal_metal":"C","commodity":"Coal (Bituminous)","state":"WV","county":"Mcdowell","nearest_town":"Panther","operator_id":"P23069","operator_name":"Rock 'N' Roll Coal Company, Inc.","controller_id":"C15217","controller_name":"David  Cline","district":"C04","office":"Beckley District","employees":0,"latitude":37.475555,"longitude":-81.8625},"coverage":{"contributingSources":15,"registeredSources":20,"sourceRows":338},"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":"4608960","name":"Mine No. 4"},"operator":{"type":"operator","id":"P23069","name":"Rock 'N' Roll Coal Company, Inc."},"controller":{"type":"controller","id":"C15217","name":"David  Cline"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"C15217","name":"David  Cline"},"object":{"type":"mine","id":"4608960","name":"Mine No. 4"},"validFrom":"1995-03-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608960|C15217|1995-03-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P23069","name":"Rock 'N' Roll Coal Company, Inc."},"object":{"type":"mine","id":"4608960","name":"Mine No. 4"},"validFrom":"2002-04-24","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608960|P23069|2002-04-24|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C15217","name":"David  Cline"},"object":{"type":"operator","id":"P23069","name":"Rock 'N' Roll Coal Company, Inc."},"validFrom":"2002-04-24","validTo":null,"current":true,"derived":true,"evidenceMineId":"4608960","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4608960|P23069|2002-04-24|C15217|1995-03-01|95040"}}],"coverage":{"historyRecords":1,"edgeCount":3,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"sources":[{"id":"msha-accidents","name":"Accident, Injuries, and Illnesses","domains":["safety","contractors"],"products":["incident trends","severity rates","equipment patterns","peer denominators"],"rowCount":1,"firstDate":"2004-03-05","lastDate":"2004-03-05","metrics":{"daysLost":322,"injuries":1,"fatalities":0,"recentRows":0,"restrictedDays":0,"contractorRecords":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"266304","DOCUMENT_NO":"220040820068","ACCIDENT_DT":"03/05/2004","DEGREE_INJURY":"DAYS AWAY FROM WORK ONLY","CLASSIFICATION":"MACHINERY","ACCIDENT_TYPE":"Over-exertion NEC","OCCUPATION":"Roof bolter, Rock bolter,  Pinner, Mobile roof support operator (MRS)","NO_INJURIES":"1","DAYS_LOST":"322","NARRATIVE":"He started rotating bolt before removing his hand from the bolt.","sourceDate":"2004-03-05"}]},{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"2004-10-04","lastDate":"2004-10-04","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":32,"firstDate":"2002-08-22","lastDate":"2004-05-20","metrics":{"ss":13,"delinquent":32,"recentRows":0,"paidPenalty":2922,"proposedPenalty":4191,"currentAssessment":4191},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"799870","VIOLATION_NO":"7225870","ISSUE_DT":"05/20/2004","CFR_STANDARD_CD":"75.1722(a)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"750.00","CURRENT_ASSESSMENT_AMT":"750.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"799869","VIOLATION_NO":"7225869","ISSUE_DT":"05/20/2004","CFR_STANDARD_CD":"75.333(d)(3)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"799868","VIOLATION_NO":"7225868","ISSUE_DT":"05/20/2004","CFR_STANDARD_CD":"75.370(a)(1)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"144.00","CURRENT_ASSESSMENT_AMT":"144.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"799867","VIOLATION_NO":"7225867","ISSUE_DT":"05/20/2004","CFR_STANDARD_CD":"75.202(b)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"425.00","CURRENT_ASSESSMENT_AMT":"425.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"789376","VIOLATION_NO":"7222588","ISSUE_DT":"05/12/2004","CFR_STANDARD_CD":"77.1110","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"178.00","CURRENT_ASSESSMENT_AMT":"178.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-12"},{"SOURCE_ROW_NUMBER":"789375","VIOLATION_NO":"7222587","ISSUE_DT":"05/12/2004","CFR_STANDARD_CD":"77.1104","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"221.00","CURRENT_ASSESSMENT_AMT":"221.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-12"},{"SOURCE_ROW_NUMBER":"789374","VIOLATION_NO":"7222586","ISSUE_DT":"05/12/2004","CFR_STANDARD_CD":"77.1605(a)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"221.00","CURRENT_ASSESSMENT_AMT":"221.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-12"},{"SOURCE_ROW_NUMBER":"789373","VIOLATION_NO":"7222585","ISSUE_DT":"05/12/2004","CFR_STANDARD_CD":"77.404(a)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"221.00","CURRENT_ASSESSMENT_AMT":"221.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-12"},{"SOURCE_ROW_NUMBER":"789372","VIOLATION_NO":"7222584","ISSUE_DT":"05/12/2004","CFR_STANDARD_CD":"77.410","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"178.00","CURRENT_ASSESSMENT_AMT":"178.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-12"},{"SOURCE_ROW_NUMBER":"789371","VIOLATION_NO":"7222583","ISSUE_DT":"05/12/2004","CFR_STANDARD_CD":"77.1605(d)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"178.00","CURRENT_ASSESSMENT_AMT":"178.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-05-12"},{"SOURCE_ROW_NUMBER":"789370","VIOLATION_NO":"7222580","ISSUE_DT":"04/27/2004","CFR_STANDARD_CD":"75.311(d)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"60.00","CURRENT_ASSESSMENT_AMT":"60.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2004-04-27"},{"SOURCE_ROW_NUMBER":"789369","VIOLATION_NO":"7222579","ISSUE_DT":"04/27/2004","CFR_STANDARD_CD":"75.370(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":"2004-04-27"}]},{"id":"msha-coal-dust-samples","name":"Coal Dust Samples","domains":["health","safety"],"products":["respirable dust trends","CPDM coverage","void patterns","occupation exposure"],"rowCount":123,"firstDate":"2002-08-29","lastDate":"2004-07-21","metrics":{"recentRows":0,"cpdmSamples":0,"voidSamples":2,"validSamples":121,"maxConcentration":6.248,"concentrationTotal":92.867},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1465466","CASS_NUM":"57489454","SMP_TAKEN_DT":"7/21/2004","CONC":".392","SMP_TYPE_CD_DESC":"NON DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"MOBILE BRIDGE OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-07-21"},{"SOURCE_ROW_NUMBER":"1404446","CASS_NUM":"57489584","SMP_TAKEN_DT":"7/21/2004","CONC":"1.347","SMP_TYPE_CD_DESC":"DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-07-21"},{"SOURCE_ROW_NUMBER":"1167617","CASS_NUM":"57489464","SMP_TAKEN_DT":"7/21/2004","CONC":".433","SMP_TYPE_CD_DESC":"NON DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"ROOF BOLTER (SINGLE HEAD)","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-07-21"},{"SOURCE_ROW_NUMBER":"922575","CASS_NUM":"57489458","SMP_TAKEN_DT":"7/21/2004","CONC":".601","SMP_TYPE_CD_DESC":"NON DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER HELPER","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-07-21"},{"SOURCE_ROW_NUMBER":"881654","CASS_NUM":"57489564","SMP_TAKEN_DT":"7/21/2004","CONC":".775","SMP_TYPE_CD_DESC":"NON DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"MOBILE BRIDGE OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-07-21"},{"SOURCE_ROW_NUMBER":"18805","CASS_NUM":"57489614","SMP_TAKEN_DT":"7/21/2004","CONC":".611","SMP_TYPE_CD_DESC":"NON DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"ROOF BOLTER (SINGLE HEAD)","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-07-21"},{"SOURCE_ROW_NUMBER":"28577","CASS_NUM":"50739338","SMP_TAKEN_DT":"6/25/2004","CONC":"1.206","SMP_TYPE_CD_DESC":"DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"BIMONTHLY CYCLE/TRANSITION PERIOD SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-06-25"},{"SOURCE_ROW_NUMBER":"1625823","CASS_NUM":"50738234","SMP_TAKEN_DT":"6/11/2004","CONC":"2.061","SMP_TYPE_CD_DESC":"DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"BIMONTHLY CYCLE/TRANSITION PERIOD SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-06-11"},{"SOURCE_ROW_NUMBER":"344546","CASS_NUM":"50738206","SMP_TAKEN_DT":"6/10/2004","CONC":".52","SMP_TYPE_CD_DESC":"DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"BIMONTHLY CYCLE/TRANSITION PERIOD SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-06-10"},{"SOURCE_ROW_NUMBER":"456800","CASS_NUM":"50738192","SMP_TAKEN_DT":"6/8/2004","CONC":".51","SMP_TYPE_CD_DESC":"DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"BIMONTHLY CYCLE/TRANSITION PERIOD SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-06-08"},{"SOURCE_ROW_NUMBER":"666350","CASS_NUM":"50738194","SMP_TAKEN_DT":"6/7/2004","CONC":".835","SMP_TYPE_CD_DESC":"DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"BIMONTHLY CYCLE/TRANSITION PERIOD SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER OPERATOR","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-06-07"},{"SOURCE_ROW_NUMBER":"1570640","CASS_NUM":"57453596","SMP_TAKEN_DT":"5/7/2004","CONC":".48","SMP_TYPE_CD_DESC":"NON DESIGNATED OCCUPATION","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"CONTINUOUS MINER HELPER","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2004-05-07"}]},{"id":"msha-conferences","name":"Conferences","domains":["compliance","legal"],"products":["conference history","post-issuance changes","citation lifecycle"],"rowCount":13,"firstDate":"2004-03-09","lastDate":"2004-07-20","metrics":{"linkedIssuances":13},"periods":{},"recentRecords":[]},{"id":"msha-contractor-production-quarterly","name":"Contractor Employment and Production — Quarterly","domains":["contractors","production","safety"],"products":["contractor exposure denominator","productivity","presence windows"],"rowCount":64,"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":7,"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":1,"firstDate":"2002-04-24","lastDate":"2002-04-24","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":30,"firstDate":"2002-05-21","lastDate":"2004-10-19","metrics":{"inspectors":35,"recentRows":0,"onSiteHours":541.5,"inspectionHours":966.5,"inspectionSamples":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"574945","EVENT_NO":"4108102","INSPECTION_BEGIN_DT":"10/19/2004","INSPECTION_END_DT":"10/20/2004","ACTIVITY_CODE":"CAA","ACTIVITY":"SPOT INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"12","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2004-10-19"},{"SOURCE_ROW_NUMBER":"704685","EVENT_NO":"4103138","INSPECTION_BEGIN_DT":"07/06/2004","INSPECTION_END_DT":"09/30/2004","ACTIVITY_CODE":"AAA","ACTIVITY":"Regular Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"27.25","SUM_TOTAL_ON_SITE_HOURS":"14","sourceDate":"2004-07-06"},{"SOURCE_ROW_NUMBER":"182403","EVENT_NO":"4107612","INSPECTION_BEGIN_DT":"05/20/2004","INSPECTION_END_DT":"05/25/2004","ACTIVITY_CODE":"CAA","ACTIVITY":"SPOT INSPECTION","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"38.5","SUM_TOTAL_ON_SITE_HOURS":"14","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"2393","EVENT_NO":"4103795","INSPECTION_BEGIN_DT":"04/26/2004","INSPECTION_END_DT":"05/13/2004","ACTIVITY_CODE":"CCC","ACTIVITY":"VENTILATION TECHNICAL INSPECTION","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"25","SUM_TOTAL_ON_SITE_HOURS":"10.5","sourceDate":"2004-04-26"},{"SOURCE_ROW_NUMBER":"208387","EVENT_NO":"4103129","INSPECTION_BEGIN_DT":"04/02/2004","INSPECTION_END_DT":"06/25/2004","ACTIVITY_CODE":"AAA","ACTIVITY":"Regular Inspection","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"82","SUM_TOTAL_ON_SITE_HOURS":"57.5","sourceDate":"2004-04-02"},{"SOURCE_ROW_NUMBER":"560367","EVENT_NO":"4103784","INSPECTION_BEGIN_DT":"01/22/2004","INSPECTION_END_DT":"01/28/2004","ACTIVITY_CODE":"CCC","ACTIVITY":"VENTILATION TECHNICAL INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2004-01-22"},{"SOURCE_ROW_NUMBER":"145523","EVENT_NO":"4103122","INSPECTION_BEGIN_DT":"01/05/2004","INSPECTION_END_DT":"03/08/2004","ACTIVITY_CODE":"AAA","ACTIVITY":"Regular Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"96","SUM_TOTAL_ON_SITE_HOURS":"60.5","sourceDate":"2004-01-05"},{"SOURCE_ROW_NUMBER":"92490","EVENT_NO":"4099748","INSPECTION_BEGIN_DT":"11/05/2003","INSPECTION_END_DT":"11/06/2003","ACTIVITY_CODE":"CED","ACTIVITY":"RESP DUST TECHNICAL INVESTIGATION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"2.5","sourceDate":"2003-11-05"},{"SOURCE_ROW_NUMBER":"646660","EVENT_NO":"4103114","INSPECTION_BEGIN_DT":"10/02/2003","INSPECTION_END_DT":"12/30/2003","ACTIVITY_CODE":"AAA","ACTIVITY":"Regular Inspection","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"123.25","SUM_TOTAL_ON_SITE_HOURS":"71","sourceDate":"2003-10-02"},{"SOURCE_ROW_NUMBER":"625054","EVENT_NO":"4105212","INSPECTION_BEGIN_DT":"08/07/2003","INSPECTION_END_DT":"08/07/2003","ACTIVITY_CODE":"CCA","ACTIVITY":"ROOF CONTROL TECHNICAL INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8","SUM_TOTAL_ON_SITE_HOURS":"5","sourceDate":"2003-08-07"},{"SOURCE_ROW_NUMBER":"666652","EVENT_NO":"4097597","INSPECTION_BEGIN_DT":"07/01/2003","INSPECTION_END_DT":"09/25/2003","ACTIVITY_CODE":"AAA","ACTIVITY":"Regular Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"50","SUM_TOTAL_ON_SITE_HOURS":"32","sourceDate":"2003-07-01"},{"SOURCE_ROW_NUMBER":"293937","EVENT_NO":"4103763","INSPECTION_BEGIN_DT":"05/28/2003","INSPECTION_END_DT":"06/04/2003","ACTIVITY_CODE":"CCC","ACTIVITY":"VENTILATION TECHNICAL INSPECTION","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"12","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2003-05-28"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":11,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2004-Q4":{"hours":0,"employees":0,"production":0},"2004-Q3":{"hours":4296,"employees":15,"production":11636},"2004-Q2":{"hours":9370,"employees":15,"production":23105},"2004-Q1":{"hours":10272,"employees":15,"production":29732},"2003-Q4":{"hours":8508,"employees":15,"production":25593},"2003-Q3":{"hours":6331,"employees":15,"production":24242},"2003-Q2":{"hours":9115,"employees":15,"production":30096},"2003-Q1":{"hours":6499,"employees":13,"production":21616},"2002-Q4":{"hours":6943,"employees":14,"production":23815},"2002-Q3":{"hours":8591,"employees":16,"production":17333},"2002-Q2":{"hours":150,"employees":3,"production":472}},"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":{"2002":{"hours":15684,"employees":11,"production":41620},"2003":{"hours":30453,"employees":15,"production":101547},"2004":{"hours":23938,"employees":15,"production":64473}},"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-noise-samples","name":"Noise Samples","domains":["health","safety","equipment"],"products":["hearing exposure","machine and manufacturer patterns","occupation coverage"],"rowCount":5,"firstDate":"2003-04-29","lastDate":"2003-04-29","metrics":{"recentRows":0,"doseOver100":0,"actDoseTotal":211,"pelDoseTotal":147},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"249423","EVENT_NO":"4097590","SURVEY_DATE":"04/29/2003","OCCUPATION_CD_DESC":"MOBILE BRIDGE OPERATOR","MACHINE_CD":"08","MANUFACTURER_CD":"038","ACT_DOSE_85":"46","PEL_DOSE_90":"35","SURVEY_TYPE":"I","sourceDate":"2003-04-29"},{"SOURCE_ROW_NUMBER":"249422","EVENT_NO":"4097590","SURVEY_DATE":"04/29/2003","OCCUPATION_CD_DESC":"MOBILE BRIDGE OPERATOR","MACHINE_CD":"08","MANUFACTURER_CD":"038","ACT_DOSE_85":"33","PEL_DOSE_90":"14","SURVEY_TYPE":"I","sourceDate":"2003-04-29"},{"SOURCE_ROW_NUMBER":"249421","EVENT_NO":"4097590","SURVEY_DATE":"04/29/2003","OCCUPATION_CD_DESC":"MOBILE BRIDGE OPERATOR","MACHINE_CD":"08","MANUFACTURER_CD":"038","ACT_DOSE_85":"41","PEL_DOSE_90":"28","SURVEY_TYPE":"I","sourceDate":"2003-04-29"},{"SOURCE_ROW_NUMBER":"249420","EVENT_NO":"4097590","SURVEY_DATE":"04/29/2003","OCCUPATION_CD_DESC":"MOBILE BRIDGE OPERATOR","MACHINE_CD":"08","MANUFACTURER_CD":"038","ACT_DOSE_85":"33","PEL_DOSE_90":"20","SURVEY_TYPE":"I","sourceDate":"2003-04-29"},{"SOURCE_ROW_NUMBER":"249419","EVENT_NO":"4097590","SURVEY_DATE":"04/29/2003","OCCUPATION_CD_DESC":"CONTINUOUS MINER OPERATOR","MACHINE_CD":"06","MANUFACTURER_CD":"066","ACT_DOSE_85":"58","PEL_DOSE_90":"50","SURVEY_TYPE":"I","sourceDate":"2003-04-29"}]},{"id":"msha-quartz-samples","name":"Quartz Samples — Coal","domains":["health","safety"],"products":["quartz exposure trends","occupation context","applicable-rule linkage"],"rowCount":6,"firstDate":"2002-08-29","lastDate":"2004-07-21","metrics":{"recentRows":0,"voidSamples":0,"maxQuartzPct":9.8,"validSamples":6,"quartzPctTotal":33.1},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"105033","CASSETTE_NO":"57489584","SAMPLE_DT":"07/21/2004","QUARTZ_PCT":"05.2","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2004-07-21"},{"SOURCE_ROW_NUMBER":"14520","CASSETTE_NO":"57444270","SAMPLE_DT":"01/16/2004","QUARTZ_PCT":"05.1","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2004-01-16"},{"SOURCE_ROW_NUMBER":"142589","CASSETTE_NO":"50696494","SAMPLE_DT":"09/25/2003","QUARTZ_PCT":"04.9","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2003-09-25"},{"SOURCE_ROW_NUMBER":"110948","CASSETTE_NO":"57443750","SAMPLE_DT":"09/03/2003","QUARTZ_PCT":"09.8","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2003-09-03"},{"SOURCE_ROW_NUMBER":"11012","CASSETTE_NO":"57419944","SAMPLE_DT":"10/22/2002","QUARTZ_PCT":"05.0","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2002-10-22"},{"SOURCE_ROW_NUMBER":"43677","CASSETTE_NO":"57399431","SAMPLE_DT":"08/29/2002","QUARTZ_PCT":"03.1","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2002-08-29"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":40,"firstDate":"2002-08-22","lastDate":"2004-05-20","metrics":{"ss":14,"amountDue":4191,"contested":0,"amountPaid":2922,"recentRows":0,"section104d":1,"unterminated":6,"proposedPenalty":4191},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"2834462","VIOLATION_NO":"7225870","VIOLATION_ISSUE_DT":"05/20/2004","SIG_SUB":"Y","PART_SECTION":"75.1722(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"HighNegligence","TERMINATION_DT":"05/25/2004","PROPOSED_PENALTY":"750","AMOUNT_DUE":"750","AMOUNT_PAID":"750","CONTESTED_IND":"N","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"2834461","VIOLATION_NO":"7225869","VIOLATION_ISSUE_DT":"05/20/2004","SIG_SUB":"N","PART_SECTION":"75.333(d)(3)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"8","NEGLIGENCE":"HighNegligence","TERMINATION_DT":"05/20/2004","PROPOSED_PENALTY":"60","AMOUNT_DUE":"60","AMOUNT_PAID":"60","CONTESTED_IND":"N","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"2834460","VIOLATION_NO":"7225868","VIOLATION_ISSUE_DT":"05/20/2004","SIG_SUB":"Y","PART_SECTION":"75.370(a)(1)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"Permanent","NO_AFFECTED":"2","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"05/20/2004","PROPOSED_PENALTY":"144","AMOUNT_DUE":"144","AMOUNT_PAID":"144","CONTESTED_IND":"N","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"2834459","VIOLATION_NO":"7225867","VIOLATION_ISSUE_DT":"05/20/2004","SIG_SUB":"Y","PART_SECTION":"75.202(b)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Highly","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"05/25/2004","PROPOSED_PENALTY":"425","AMOUNT_DUE":"425","AMOUNT_PAID":"425","CONTESTED_IND":"N","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"2834458","VIOLATION_NO":"7225866","VIOLATION_ISSUE_DT":"05/20/2004","SIG_SUB":"Y","SECTION_OF_ACT":"107(a)","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"05/25/2004","CONTESTED_IND":"N","sourceDate":"2004-05-20"},{"SOURCE_ROW_NUMBER":"2834456","VIOLATION_NO":"7222594","VIOLATION_ISSUE_DT":"05/14/2004","PART_SECTION":"77.1110","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"05/18/2004","CONTESTED_IND":"N","sourceDate":"2004-05-14"},{"SOURCE_ROW_NUMBER":"2834455","VIOLATION_NO":"7222593","VIOLATION_ISSUE_DT":"05/14/2004","PART_SECTION":"77.1104","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"05/18/2004","CONTESTED_IND":"N","sourceDate":"2004-05-14"},{"SOURCE_ROW_NUMBER":"2834454","VIOLATION_NO":"7222592","VIOLATION_ISSUE_DT":"05/14/2004","PART_SECTION":"77.1605(a)","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"05/18/2004","CONTESTED_IND":"N","sourceDate":"2004-05-14"},{"SOURCE_ROW_NUMBER":"2834453","VIOLATION_NO":"7222591","VIOLATION_ISSUE_DT":"05/14/2004","PART_SECTION":"77.404(a)","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"05/18/2004","CONTESTED_IND":"N","sourceDate":"2004-05-14"},{"SOURCE_ROW_NUMBER":"2834452","VIOLATION_NO":"7222590","VIOLATION_ISSUE_DT":"05/14/2004","PART_SECTION":"77.410","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"05/18/2004","CONTESTED_IND":"N","sourceDate":"2004-05-14"},{"SOURCE_ROW_NUMBER":"2834451","VIOLATION_NO":"7222589","VIOLATION_ISSUE_DT":"05/14/2004","PART_SECTION":"77.1605(d)","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"05/18/2004","CONTESTED_IND":"N","sourceDate":"2004-05-14"},{"SOURCE_ROW_NUMBER":"2834450","VIOLATION_NO":"7222588","VIOLATION_ISSUE_DT":"05/12/2004","SIG_SUB":"N","PART_SECTION":"77.1110","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","PROPOSED_PENALTY":"178","AMOUNT_DUE":"178","AMOUNT_PAID":"0","CONTESTED_IND":"N","sourceDate":"2004-05-12"}]}],"safety":{"href":"/api/v1/mines/4608960/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4608960/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","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.1722","heading":"Mechanical equipment guards.","id":"75.1722","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1722","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"R","subpartHeading":"Subpart R—Miscellaneous","text":"(a) Gears; sprockets; chains; drive, head, tail, and takeup pulleys; flywheels; couplings, shafts; sawblades; fan inlets; and similar exposed moving machine parts which may be contacted by persons, and which may cause injury to persons shall be guarded.\n\n(b) Guards at conveyor-drive, conveyor-head, and conveyor-tail pulleys shall extend a distance sufficient to prevent a person from reaching behind the guard and becoming caught between the belt and the pulley.\n\n(c) Except when testing the machinery, guards shall be securely in place while machinery is being operated.\n\n[38 FR 4976, Feb. 23, 1973]","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.333","heading":"Ventilation controls.","id":"75.333","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.333","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"D","subpartHeading":"Subpart D—Ventilation","text":"(a) For purposes of this section, “doors” include any door frames.\n\n(b) Permanent stoppings or other permanent ventilation control devices constructed after November 15, 1992, shall be built and maintained—\n\n(1) Between intake and return air courses, except temporary controls may be used in rooms that are 600 feet or less from the centerline of the entry from which the room was developed including where continuous face haulage systems are used in such rooms. Unless otherwise approved in the ventilation plan, these stoppings or controls shall be maintained to and including the third connecting crosscut outby the working face;\n\n(2) To separate belt conveyor haulageways from return air courses, except where belt entries in areas of mines developed before March 30, 1970, are used as return air courses;\n\n(3) To separate belt conveyor haulageways from intake air courses when the air in the intake air courses is used to provide air to active working places. Temporary ventilation controls may be used in rooms that are 600 feet or less from the centerline of the entry from which the rooms were developed including where continuous face haulage systems are used in such rooms. When continuous face haulage systems are used, permanent stoppings or other permanent ventilation control devices shall be built and maintained to the outby most point of travel of the dolly or 600 feet from the point of deepest penetration in the conveyor belt entry, whichever distance is closer to the point of deepest penetration, to separate the continuous haulage entry from the intake entries;\n\n(4) To separate the primary escapeway from belt and trolley haulage entries, as required by § 75.380(g). For the purposes of § 75.380(g), the loading point for a continuous haulage system shall be the outby most point of travel of the dolly or 600 feet from the point of deepest penetration, whichever distance is less; and\n\n(5) In return air courses to direct air into adjacent worked-out areas.\n\n(c) Personnel doors shall be constructed of noncombustible material and shall be of sufficient strength to serve their intended purpose of maintaining separation and permitting travel between air courses, and shall be installed as follows in permanent stoppings constructed after November 15, 1992:\n\n(1) The distance between personnel doors shall be no more than 300 feet in seam heights below 48 inches and 600 feet in seam heights 48 inches or higher.\n\n(2) The location of all personnel doors in stoppings along escapeways shall be clearly marked so that the doors may be easily identified by anyone traveling in the escapeway and in the entries on either side of the doors.\n\n(3) When not in use, personnel doors shall be closed.\n\n(4) An airlock shall be established where the air pressure differential between air courses creates a static force exceeding 125 pounds on closed personnel doors along escapeways.\n\n(d) Doors, other than personnel doors, constructed after November 15, 1992, that are used in lieu of permanent stoppings or to control ventilation within an air course shall be:\n\n(1) Made of noncombustible material or coated on all accessible surfaces with flame-retardant materials having a flame-spread index of 25 or less, as tested under ASTM E162-87, “Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source.” This publication is incorporated by reference and may be inspected at any MSHA Coal Mine Safety and Health District Office, or at MSHA's Office of Standards, Regulations, and Variances, 200 Constitution Avenue NW, Washington, DC 20210; 202-693-9440; and at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. In addition, copies of the document can be purchased from the American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959; 610-832-9500; http://www.astm.org. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51.\n\n(2) Of sufficient strength to serve their intended purpose of maintaining separation and permitting travel between or within air courses or entries.\n\n(3) Installed in pairs to form an airlock. When an airlock is used, one side of the airlock shall remain closed. When not in use, both sides shall be closed.\n\n(e)(1)(i) Except as provided in paragraphs (e)(2), (3), and (4) of this section, all overcasts, undercasts, shaft partitions, permanent stoppings, and regulators, installed after June 10, 1996, shall be constructed in a traditionally accepted method and of materials that have been demonstrated to perform adequately or in a method and of materials that have been tested and shown to have a minimum strength equal to or greater than the traditionally accepted in-mine controls. Tests may be performed under ASTM E72-80, “Standard Methods of Conducting Strength Tests of Panels for Building Construction” (Section 12-Transverse Load-Specimen Vertical, load, only), or the operator may conduct comparative in-mine tests. In-mine tests shall be designed to demonstrate the comparative strength of the proposed construction and a traditionally accepted in-mine control. The publication ASTM E72-80, “Standard Methods of Conducting Strength Tests of Panels for Building Construction,” is incorporated by reference and may be inspected at any MSHA Coal Mine Safety and Health District Office, or at MSHA's Office of Standards, Regulations, and Variances, 200 Constitution Avenue NW, Washington, DC 20210; 202-693-9440; and at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. In addition, copies of the document can be purchased from the American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959; 610-832-9500; http://www.astm.org. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51.\n\n(ii) All overcasts, undercasts, shaft partitions, permanent stoppings, and regulators, installed after November 15, 1992, shall be constructed of noncombustible material. Materials that are suitable for the construction of overcasts, undercasts, shaft partitions, permanent stoppings, and regulators include concrete, concrete block, brick, cinder block, tile, or steel. No ventilation controls installed after November 15, 1992, shall be constructed of aluminum.\n\n(2) In anthracite mines, permanent stoppings may be constructed of overlapping layers of hardwood mine boards, if the stoppings are a minimum 2 inches thick.\n\n(3) When timbers are used to create permanent stoppings in heaving or caving areas, the stoppings shall be coated on all accessible surfaces with a flame-retardant material having a flame-spread index of 25 or less, as tested under ASTM E162-87, “Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source.” This publication is incorporated by reference and may be inspected at any MSHA Coal Mine Safety and Health District Office, or at MSHA's Office of Standards, Regulations, and Variances, 200 Constitution Avenue NW, Washington, DC 20210; 202-693-9440; and at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. In addition, copies of the document can be purchased from the American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959; 610-832-9500; http://www.astm.org. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51.\n\n(4) In anthracite mines, doors and regulators may be constructed of overlapping layers of hardwood boards, if the doors, door frames, and regulators are a minimum 2 inches thick.\n\n(f) When sealants are applied to ventilation controls, the sealant shall have a flame-spread index of 25 or less under ASTM E162-87, “Standard Test Method for Surface Flammability of Materials Using a Radiant Heat Energy Source.” This publication is incorporated by reference and may be inspected at any MSHA Coal Mine Safety and Health District Office, or at MSHA's Office of Standards, Regulations, and Variances, 200 Constitution Avenue NW, Washington, DC 20210; 202-693-9440; and at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. In addition, copies of the document can be purchased from the American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959; 610-832-9500; http://www.astm.org. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51.\n\n(g) Before mining is discontinued in an entry or room that is advanced more than 20 feet from the inby rib, a crosscut shall be made or line brattice shall be installed and maintained to provide adequate ventilation. When conditions such as methane liberation warrant a distance less than 20 feet, the approved ventilation plan shall specify the location of such rooms or entries and the maximum distance they will be developed before a crosscut is made or line brattice is installed.\n\n(h) All ventilation controls, including seals, shall be maintained to serve the purpose for which they were built.\n\n[61 FR 9829, Mar. 11, 1996; 61 FR 20877, May 8, 1996; 61 FR 26442, May 28, 1996; 61 FR 29288, 29289, June 10, 1996, as amended at 67 FR 38386, June 4, 2002; 71 FR 16668, Apr. 3, 2006; 73 FR 80612, Dec. 31, 2008; 80 FR 52991, Sept. 2, 2015; 91 FR 9448, Feb. 26, 2026]","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.370","heading":"Mine ventilation plan; submission and approval.","id":"75.370","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.370","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"D","subpartHeading":"Subpart D—Ventilation","text":"(a)(1) The operator shall develop and follow a ventilation plan approved by the district manager. The plan shall be designed to control methane and respirable dust and shall be suitable to the conditions and mining system at the mine. The ventilation plan shall consist of two parts, the plan content as prescribed in § 75.371 and the ventilation map with information as prescribed in § 75.372. Only that portion of the map which contains information required under § 75.371 will be subject to approval by the district manager.\n\n(2) The proposed ventilation plan and any revision to the plan shall be submitted in writing to the district manager. When revisions to a ventilation plan are proposed, only the revised pages, maps, or sketches of the plan need to be submitted. When required in writing by the district manager, the operator shall submit a fully revised plan by consolidating the plan and all revisions in an orderly manner and by deleting all outdated material.\n\n(3) (i) The mine operator shall notify the representative of miners at least 5 days prior to submission of a mine ventilation plan and any revision to a mine ventilation plan. If requested, the mine operator shall provide a copy to the representative of miners at the time of notification. In the event of a situation requiring immediate action on a plan revision, notification of the revision shall be given, and if requested, a copy of the revision shall be provided, to the representative of miners by the operator at the time of submittal;\n\n(ii) A copy of the proposed ventilation plan, and a copy of any proposed revision, submitted for approval shall be made available for inspection by the representative of miners; and\n\n(iii) A copy of the proposed ventilation plan, and a copy of any proposed revision, submitted for approval shall be posted on the mine bulletin board at the time of submittal. The proposed plan or proposed revision shall remain posted until it is approved, withdrawn or denied.\n\n(b) Following receipt of the proposed plan or proposed revision, the representative of miners may submit timely comments to the district manager, in writing, for consideration during the review process. A copy of these comments shall also be provided to the operator by the district manager upon request.\n\n(c) (1) The district manager will notify the operator in writing of the approval or denial of approval of a proposed ventilation plan or proposed revision. A copy of this notification will be sent to the representative of miners by the district manager.\n\n(2) If the district manager denies approval of a proposed plan or revision, the deficiencies of the plan or revision shall be specified in writing and the operator will be provided an opportunity to discuss the deficiencies with the district manager.\n\n(d) No proposed ventilation plan shall be implemented before it is approved by the district manager. Any intentional change to the ventilation system that alters the main air current or any split of the main air current in a manner that could materially affect the safety and health of the miners, or any change to the information required in § 75.371 shall be submitted to and approved by the district manager before implementation.\n\n(e) Before implementing an approved ventilation plan or a revision to a ventilation plan, persons affected by the revision shall be instructed by the operator in its provisions.\n\n(f) The approved ventilation plan and any revisions shall be—\n\n(1) Provided upon request to the representative of miners by the operator following notification of approval;\n\n(2) Made available for inspection by the representative of miners; and\n\n(3) Posted on the mine bulletin board within 1 working day following notification of approval. The approved plan and revisions shall remain posted on the bulletin board for the period that they are in effect.\n\n(g) The ventilation plan for each mine shall be reviewed every 6 months by an authorized representative of the Secretary to assure that it is suitable to current conditions in the mine.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.202","heading":"Protection from falls of roof, face and ribs.","id":"75.202","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.202","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"C","subpartHeading":"Subpart C—Roof Support","text":"(a) The roof, face and ribs of areas where persons work or travel shall be supported or otherwise controlled to protect persons from hazards related to falls of the roof, face or ribs and coal or rock bursts.\n\n(b) No person shall work or travel under unsupported roof unless in accordance with this subpart.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.1110","heading":"Examination and maintenance of firefighting equipment.","id":"77.1110","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1110","part":"77","partHeading":"PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"L","subpartHeading":"Subpart L—Fire Protection","text":"Firefighting equipment shall be continuously maintained in a usable and operative condition. Fire extinguishers shall be examined at least once every 6 months and the date of such examination shall be recorded on a permanent tag attached to the extinguisher.\n\n(Pub. L. No. 96-511, 94 Stat. 2812 (44 U.S.C. 3501 et seq.))\n\n[36 FR 9364, May 22, 1971, as amended at 60 FR 33723, June 29, 1995]","occurrenceCount":2},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.1104","heading":"Accumulations of combustible materials.","id":"77.1104","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1104","part":"77","partHeading":"PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"L","subpartHeading":"Subpart L—Fire Protection","text":"Combustible materials, grease, lubricants, paints, or flammable liquids shall not be allowed to accumulate where they can create a fire hazard.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.1605","heading":"Loading and haulage equipment; installations.","id":"77.1605","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1605","part":"77","partHeading":"PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"Q","subpartHeading":"Subpart Q—Loading and Haulage","text":"(a) Cab windows shall be of safety glass or equivalent, in good condition and shall be kept clean.\n\n(b) Mobile equipment shall be equipped with adequate brakes, and all trucks and front-end loaders shall also be equipped with parking brakes.\n\n(c) Positive-action type brakes shall be provided on aerial tramways.\n\n(d) Mobile equipment shall be provided with audible warning devices. Lights shall be provided on both ends when required.\n\n(e) Guard nets or other suitable protection shall be provided where tramways pass over roadways, walkways, or buildings.\n\n(f) Guards shall be installed to prevent swaying buckets from hitting towers.\n\n(g) Aerial tramway cable connections shall be designed to offer minimum obstruction to the passage of wheels.\n\n(h) Rocker-bottom or bottom-dump cars shall be equipped with positive locking devices, or other suitable devices.\n\n(i) Ramps and dumps shall be of solid construction, of ample width, have ample clearance and headroom, and be kept reasonably free of spillage.\n\n(j) Chute-loading installations shall be designed so that the men pulling chutes are not required to be in a hazardous position during loading operations.\n\n(k) Berms or guards shall be provided on the outer bank of elevated roadways.\n\n(l) Berms, bumper blocks, safety hooks, or similar means shall be provided to prevent overtravel and overturning at dumping locations.\n\n(m) Roadbeds, rails, joints, switches, frogs, and other elements on railroads shall be designed, installed, and maintained in a safe manner consistent with the speed and type of haulage.\n\n(n) Where practicable, a minimum of 30 inches continuous clearance from the farthest projection of moving railroad equipment shall be provided on at least one side of the tracks; all places where it is not possible to provide 30-inch clearance shall be marked conspicuously.\n\n(o) Track guardrails, lead rails, and frogs shall be protected or blocked so as to prevent a person's foot from becoming wedged.\n\n(p) Positive-acting stop-blocks, derail devices, track skates, or other adequate means shall be installed wherever necessary to protect persons from runaway or moving railroad equipment.\n\n(q) Switch throws shall be installed so as to provide adequate clearance for switchmen.\n\n(r) Where necessary, bumper blocks or the equivalent shall be provided at all track dead ends.","occurrenceCount":2},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.404","heading":"Machinery and equipment; operation and maintenance.","id":"77.404","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.404","part":"77","partHeading":"PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"E","subpartHeading":"Subpart E—Safeguards for Mechanical Equipment","text":"(a) Mobile and stationary machinery and equipment shall be maintained in safe operating condition and machinery or equipment in unsafe condition shall be removed from service immediately.\n\n(b) Machinery and equipment shall be operated only by persons trained in the use of and authorized to operate such machinery or equipment.\n\n(c) Repairs or maintenance shall not be performed on machinery until the power is off and the machinery is blocked against motion, except where machinery motion is necessary to make adjustments.\n\n(d) Machinery shall not be lubricated while in motion where a hazard exists, unless equipped with extended fittings or cups.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.410","heading":"Mobile equipment; automatic warning devices.","id":"77.410","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.410","part":"77","partHeading":"PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"E","subpartHeading":"Subpart E—Safeguards for Mechanical Equipment","text":"(a) Mobile equipment such as front-end loaders, forklifts, tractors, graders, and trucks, except pickup trucks with an unobstructed rear view, shall be equipped with a warning device that—\n\n(1) Gives an audible alarm when the equipment is put in reverse; or\n\n(2) Uses infrared light, ultrasonic waves, radar, or other effective devices to detect objects or persons at the rear of the equipment, and sounds an audible alarm when a person or object is detected. This type of discriminating warning device shall—\n\n(i) Have a sensing area of a sufficient size that would allow endangered persons adequate time to get out of the danger zone.\n\n(ii) Give audible and visual alarms inside the operator's compartment and an audible alarm outside of the operator's compartment when a person or object is detected in the sensing area; and\n\n(iii) When the equipment is put in reverse, activate and give a one-time audible and visual alarm inside the operator's compartment and a one-time audible alarm outside the operator's compartment.\n\n(b) Alarms shall be audible above the surrounding noise levels.\n\n(c) Warning devices shall be maintained in functional condition.\n\n(d) An automatic reverse-activated strobe light may be substituted for an audible alarm when mobile equipment is operated at night.\n\n[54 FR 30517, July 20, 1989]","occurrenceCount":1}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"4608960","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}