{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"4609126","name":"Saylor Mine","status":"Abandoned and Sealed","status_date":"2013-08-12","mine_type":"Underground","coal_metal":"C","commodity":"Coal (Bituminous)","state":"WV","county":"Webster","nearest_town":"Bays","operator_id":"0051081","operator_name":"Brooks Run Mining Company LLC","controller_id":"0137121","controller_name":"Pristine Clean Energy LLC","district":"C04","office":"Summersville WV Field Office","employees":0,"latitude":38.537222,"longitude":-80.693888},"coverage":{"contributingSources":16,"registeredSources":20,"sourceRows":746},"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":"4609126","name":"Saylor Mine"},"operator":{"type":"operator","id":"0051081","name":"Brooks Run Mining Company LLC"},"controller":{"type":"controller","id":"0137121","name":"Pristine Clean Energy LLC"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"controller_controls_mine","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"mine","id":"4609126","name":"Saylor Mine"},"validFrom":"2003-02-01","validTo":"2016-07-25","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609126|0041211|2003-02-01|2016-07-25"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"0051081","name":"Brooks Run Mining Company LLC"},"object":{"type":"mine","id":"4609126","name":"Saylor Mine"},"validFrom":"2005-11-16","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609126|0051081|2005-11-16|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0041211","name":"Alpha Natural Resources, Inc."},"object":{"type":"operator","id":"0051081","name":"Brooks Run Mining Company LLC"},"validFrom":"2005-11-16","validTo":"2016-07-25","current":false,"derived":true,"evidenceMineId":"4609126","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609126|0051081|2005-11-16|0041211|2003-02-01|1678"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"mine","id":"4609126","name":"Saylor Mine"},"validFrom":"2016-07-26","validTo":"2017-10-04","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609126|0127923|2016-07-26|2017-10-04"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0127923","name":"Alpha Natural Resources Holdings, Inc"},"object":{"type":"operator","id":"0051081","name":"Brooks Run Mining Company LLC"},"validFrom":"2016-07-26","validTo":"2017-10-04","current":false,"derived":true,"evidenceMineId":"4609126","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609126|0051081|2005-11-16|0127923|2016-07-26|25094"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"0137121","name":"Pristine Clean Energy LLC"},"object":{"type":"mine","id":"4609126","name":"Saylor Mine"},"validFrom":"2017-10-05","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609126|0137121|2017-10-05|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"0137121","name":"Pristine Clean Energy LLC"},"object":{"type":"operator","id":"0051081","name":"Brooks Run Mining Company LLC"},"validFrom":"2017-10-05","validTo":null,"current":true,"derived":true,"evidenceMineId":"4609126","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4609126|0051081|2005-11-16|0137121|2017-10-05|27643"}}],"coverage":{"historyRecords":3,"edgeCount":7,"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":8,"firstDate":"2009-09-01","lastDate":"2011-02-22","metrics":{"daysLost":43,"injuries":2,"fatalities":0,"recentRows":0,"restrictedDays":0,"contractorRecords":0},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"64071","DOCUMENT_NO":"220110600001","ACCIDENT_DT":"02/22/2011","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FALL OF ROOF OR BACK","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","DAYS_LOST":"0","NARRATIVE":"Roof fall measuring 25' long, 20' wide, and 8' thick was discovered in the #4 entry at survey mark 66128 approximately 2000' from the working face.  The area was developed 2/4/11 with 6' torque tension roof bolts as the primary support.  Fall did not impede travel, nor affect ventilation. No injuries occurred as a result of the fall.","sourceDate":"2011-02-22"},{"SOURCE_ROW_NUMBER":"145867","DOCUMENT_NO":"220110490019","ACCIDENT_DT":"02/15/2011","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FALL OF ROOF OR BACK","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","DAYS_LOST":"0","NARRATIVE":"A roof fall measuring 20'long, 18'wide, and 8'thick was discovered in the #5 entry outby spad 66202.  Fall was 600' from the working face and did not affect ventilation or the passage of men.  Area was developed 2/11/11 with 6' torque tension roof bolts as primary support.  No injuries were reported as a result of the fall.","sourceDate":"2011-02-15"},{"SOURCE_ROW_NUMBER":"59795","DOCUMENT_NO":"220110490020","ACCIDENT_DT":"02/14/2011","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FALL OF ROOF OR BACK","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","DAYS_LOST":"0","NARRATIVE":"A roof fall measuring 36'long, 19'wide, and 12'thick was discovered in the #4 entry 6 belt inby spad 65935.  The fall was 650' from the working section and was developed Jan 2011 with 6' and 8' torque tension roof bolts as support.  The fall did not impede ventilation or the passage of men. No injuries were reported as a result of the fall.","sourceDate":"2011-02-14"},{"SOURCE_ROW_NUMBER":"171740","DOCUMENT_NO":"220110390030","ACCIDENT_DT":"02/03/2011","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FALL OF ROOF OR BACK","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","DAYS_LOST":"0","NARRATIVE":"Roof fall was discovered in return 3200' from working face and measured 50' long, 18.5' wide, 12'thick.  Fall was located in Southwest return panel and was developed in 2009, 4' glue bolts were the primary support.  Ventilation and passage of men not affected.  Fall area will be barricaded and dangered off.","sourceDate":"2011-02-03"},{"SOURCE_ROW_NUMBER":"201751","DOCUMENT_NO":"220110390029","ACCIDENT_DT":"02/01/2011","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FALL OF ROOF OR BACK","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","DAYS_LOST":"0","NARRATIVE":"Roof fall discovered in return 3900' from working section measuring 80'-150' long, 160' wide, and unknown thickness.  Fall was located between #7 and #8 entry, the area was developed 1/20/09 with 4' glue bolts as primary support.  Fall was immediately reported and investigated by MSHA.","sourceDate":"2011-02-01"},{"SOURCE_ROW_NUMBER":"240657","DOCUMENT_NO":"220103620014","ACCIDENT_DT":"12/17/2010","DEGREE_INJURY":"NO DYS AWY FRM WRK,NO RSTR ACT","CLASSIFICATION":"HANDTOOLS (NONPOWERED)","ACCIDENT_TYPE":"Caught in, under or between a moving and a stationary object","OCCUPATION":"Electrician, Lineman","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"While using sledge hammer to strike feeder drive chain, employee missed his target, striking finger on his left hand between feeder frame and hammer handle.","sourceDate":"2010-12-17"},{"SOURCE_ROW_NUMBER":"72689","DOCUMENT_NO":"220102010010","ACCIDENT_DT":"07/13/2010","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FALL OF ROOF OR BACK","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","DAYS_LOST":"0","NARRATIVE":"A roof fall was discovered in the 3rd left return off #2 mains at spad 63665.  The fall was 2000' outby the working section, neither ventilation nor the passage of men was not affected.  The fall measured 8' high, 100' wide, 175' long.  The area was developed Feb 2010 with 48\" glue bolts as primary roof support.  The entrances to the fall was timbered.","sourceDate":"2010-07-13"},{"SOURCE_ROW_NUMBER":"29807","DOCUMENT_NO":"220092530003","ACCIDENT_DT":"09/01/2009","DEGREE_INJURY":"PERM TOT OR PERM PRTL DISABLTY","CLASSIFICATION":"FALL OF ROOF OR BACK","ACCIDENT_TYPE":"Struck by falling object","OCCUPATION":"Roof bolter, Rock bolter,  Pinner, Mobile roof support operator (MRS)","NO_INJURIES":"1","DAYS_LOST":"43","NARRATIVE":"Employee was reaching for a bundle of roof bolt plates while operating a roof bolter, when rock measuring 24\" x 18\" x 6\" thick fell from the roof between 2 previous roof supports and struck the right hand.  Employee sustained fractures to the smaller finger right hand to which was later amputated to the first joint.","sourceDate":"2009-09-01"}]},{"id":"msha-addresses","name":"Addresses of Record","domains":["identity","logistics"],"products":["entity resolution","address history","facility geocoding"],"rowCount":1,"firstDate":"2013-08-12","lastDate":"2013-08-12","metrics":{},"periods":{},"recentRecords":[]},{"id":"msha-assessed-violations","name":"Assessed Violations","domains":["compliance","legal"],"products":["penalty lifecycle","paid and outstanding amounts","assessment aging"],"rowCount":117,"firstDate":"2008-12-11","lastDate":"2013-01-09","metrics":{"ss":24,"delinquent":117,"recentRows":0,"paidPenalty":40343,"proposedPenalty":48423,"currentAssessment":40343},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1829995","VIOLATION_NO":"7188284","ISSUE_DT":"01/09/2013","CFR_STANDARD_CD":"77.205(a)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"1304.00","CURRENT_ASSESSMENT_AMT":"1304.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2013-01-09"},{"SOURCE_ROW_NUMBER":"833447","VIOLATION_NO":"8121426","ISSUE_DT":"03/01/2011","CFR_STANDARD_CD":"75.512","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"108.00","CURRENT_ASSESSMENT_AMT":"108.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2011-03-01"},{"SOURCE_ROW_NUMBER":"833448","VIOLATION_NO":"8121929","ISSUE_DT":"02/22/2011","CFR_STANDARD_CD":"75.1100-3","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"138.00","CURRENT_ASSESSMENT_AMT":"138.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2011-02-22"},{"SOURCE_ROW_NUMBER":"833443","VIOLATION_NO":"8119537","ISSUE_DT":"02/17/2011","CFR_STANDARD_CD":"75.1700","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"3996.00","CURRENT_ASSESSMENT_AMT":"2997.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2011-02-17"},{"SOURCE_ROW_NUMBER":"833446","VIOLATION_NO":"8121414","ISSUE_DT":"01/25/2011","CFR_STANDARD_CD":"72.630(b)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"117.00","CURRENT_ASSESSMENT_AMT":"117.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2011-01-25"},{"SOURCE_ROW_NUMBER":"833445","VIOLATION_NO":"8121412","ISSUE_DT":"01/18/2011","CFR_STANDARD_CD":"75.1101","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"108.00","CURRENT_ASSESSMENT_AMT":"108.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2011-01-18"},{"SOURCE_ROW_NUMBER":"833444","VIOLATION_NO":"8121411","ISSUE_DT":"01/18/2011","CFR_STANDARD_CD":"75.1731(a)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"100.00","CURRENT_ASSESSMENT_AMT":"100.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2011-01-18"},{"SOURCE_ROW_NUMBER":"1800207","VIOLATION_NO":"8121403","ISSUE_DT":"11/10/2010","CFR_STANDARD_CD":"72.630(b)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"873.00","CURRENT_ASSESSMENT_AMT":"873.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2010-11-10"},{"SOURCE_ROW_NUMBER":"1800204","VIOLATION_NO":"8095320","ISSUE_DT":"11/03/2010","CFR_STANDARD_CD":"77.1606(c)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"108.00","CURRENT_ASSESSMENT_AMT":"108.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2010-11-03"},{"SOURCE_ROW_NUMBER":"1800203","VIOLATION_NO":"8095184","ISSUE_DT":"11/03/2010","CFR_STANDARD_CD":"77.1606(c)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"1026.00","CURRENT_ASSESSMENT_AMT":"1026.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2010-11-03"},{"SOURCE_ROW_NUMBER":"1800206","VIOLATION_NO":"8103890","ISSUE_DT":"10/14/2010","CFR_STANDARD_CD":"75.342(a)(4)","SIG_SUB_IND":"N","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"499.00","CURRENT_ASSESSMENT_AMT":"499.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2010-10-14"},{"SOURCE_ROW_NUMBER":"1800205","VIOLATION_NO":"8103889","ISSUE_DT":"10/14/2010","CFR_STANDARD_CD":"75.370(a)(1)","SIG_SUB_IND":"Y","CITATION_TYPE_CD":"Citation","PROPOSED_PENALTY_AMT":"687.00","CURRENT_ASSESSMENT_AMT":"687.00","ASSESS_CASE_STATUS_CD":"Closed","sourceDate":"2010-10-14"}]},{"id":"msha-civil-penalty-dockets-decisions","name":"Civil Penalty Dockets and Decisions","domains":["compliance","legal"],"products":["docket lineage","decision outcomes","citation packet precedent"],"rowCount":27,"firstDate":"2011-09-20","lastDate":"2013-12-23","metrics":{"appeals":0,"decisions":27,"recentRows":0,"decisionPenalty":18566,"originalPenalty":26846},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"75045","VIOLATION_NO":"8113777","DOCKET_NO":"WEVA 2011-2164","DECISION_DT":"12/23/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"10200.00","DECISION_PENALTY_AMT":"7000.00","JUDGE_FIRST_NAME":"Robert","JUDGE_LAST_NAME":"Lesnick","sourceDate":"2013-12-23"},{"SOURCE_ROW_NUMBER":"301309","VIOLATION_NO":"8119537","DOCKET_NO":"WEVA 2011-1727","DECISION_DT":"11/07/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"3996.00","DECISION_PENALTY_AMT":"2997.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-11-07"},{"SOURCE_ROW_NUMBER":"288007","VIOLATION_NO":"8113808","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"1203.00","DECISION_PENALTY_AMT":"1044.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"287735","VIOLATION_NO":"8113805","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"425.00","DECISION_PENALTY_AMT":"200.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"286915","VIOLATION_NO":"8113792","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":"100.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"285440","VIOLATION_NO":"8113771","DOCKET_NO":"WEVA 2011-34","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Withdrawal","ORIGINAL_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":"0.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"284970","VIOLATION_NO":"8113766","DOCKET_NO":"WEVA 2011-34","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":"100.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"284623","VIOLATION_NO":"8095294","DOCKET_NO":"WEVA 2011-34","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":"100.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"284239","VIOLATION_NO":"8113780","DOCKET_NO":"WEVA 2011-34","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Withdrawal","ORIGINAL_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":"0.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"63948","VIOLATION_NO":"8113804","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"425.00","DECISION_PENALTY_AMT":"200.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"63906","VIOLATION_NO":"8113803","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"285.00","DECISION_PENALTY_AMT":"285.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"},{"SOURCE_ROW_NUMBER":"62434","VIOLATION_NO":"8113781","DOCKET_NO":"WEVA 2011-34","DECISION_DT":"01/31/2013","DECISION_TYPE_CODE_DESC":"Settlement","ORIGINAL_PENALTY_AMT":"1412.00","DECISION_PENALTY_AMT":"806.00","JUDGE_FIRST_NAME":"Michael","JUDGE_LAST_NAME":"Zielinski","sourceDate":"2013-01-31"}]},{"id":"msha-coal-dust-samples","name":"Coal Dust Samples","domains":["health","safety"],"products":["respirable dust trends","CPDM coverage","void patterns","occupation exposure"],"rowCount":145,"firstDate":"2009-05-04","lastDate":"2011-03-07","metrics":{"recentRows":0,"cpdmSamples":0,"voidSamples":10,"validSamples":135,"maxConcentration":3.195,"concentrationTotal":56.527},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"1408239","CASS_NUM":"51120667","SMP_TAKEN_DT":"3/7/2011","CONC":".731","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":"2011-03-07"},{"SOURCE_ROW_NUMBER":"1268868","CASS_NUM":"51053750","SMP_TAKEN_DT":"2/3/2011","CONC":".161","SMP_TYPE_CD_DESC":"PART 90 MINER","SMP_USE_CD_DESC":"BIMONTHLY CYCLE/TRANSITION PERIOD SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"UTILITY MAN","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2011-02-03"},{"SOURCE_ROW_NUMBER":"1129411","CASS_NUM":"57911422","SMP_TAKEN_DT":"1/25/2011","CONC":".365","SMP_TYPE_CD_DESC":"INTAKE AIR","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"OCCUPATION CODE NOT FOUND","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2011-01-25"},{"SOURCE_ROW_NUMBER":"861704","CASS_NUM":"57911222","SMP_TAKEN_DT":"1/25/2011","CONC":".219","SMP_TYPE_CD_DESC":"PART 90 MINER","SMP_USE_CD_DESC":"NOT USED ON INSPECTOR SAMPLES; NOT FOUND ON OPERATOR SAMPLE","VOID_CD_DESC":"SAMPLE NOT VOIDED","OCC_CD_DESC":"UTILITY MAN","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2011-01-25"},{"SOURCE_ROW_NUMBER":"852329","CASS_NUM":"57911224","SMP_TAKEN_DT":"1/25/2011","CONC":".541","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":"2011-01-25"},{"SOURCE_ROW_NUMBER":"644658","CASS_NUM":"57911332","SMP_TAKEN_DT":"1/25/2011","CONC":"1.598","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":"SHUTTLE CAR OPERATOR (STANDARD SIDE)","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2011-01-25"},{"SOURCE_ROW_NUMBER":"488083","CASS_NUM":"57911429","SMP_TAKEN_DT":"1/25/2011","CONC":".55","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":"SHUTTLE CAR OPERATOR (STANDARD SIDE)","DEVICE_TYPE_CD":"CMDPSU","sourceDate":"2011-01-25"},{"SOURCE_ROW_NUMBER":"311605","CASS_NUM":"57911408","SMP_TAKEN_DT":"1/25/2011","CONC":".428","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":"2011-01-25"},{"SOURCE_ROW_NUMBER":"120896","CASS_NUM":"57911250","SMP_TAKEN_DT":"1/25/2011","CONC":".603","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":"2011-01-25"},{"SOURCE_ROW_NUMBER":"48757","CASS_NUM":"51075561","SMP_TAKEN_DT":"1/11/2011","CONC":".202","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":"2011-01-11"},{"SOURCE_ROW_NUMBER":"845304","CASS_NUM":"51075533","SMP_TAKEN_DT":"1/10/2011","CONC":".817","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":"2011-01-10"},{"SOURCE_ROW_NUMBER":"40700","CASS_NUM":"51075543","SMP_TAKEN_DT":"1/7/2011","CONC":"1.16","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":"2011-01-07"}]},{"id":"msha-contested-violations","name":"Contested Violations","domains":["compliance","legal"],"products":["contest status","time to resolution","contested-rate context"],"rowCount":27,"firstDate":"2009-10-21","lastDate":"2011-02-17","metrics":{"decisions":27,"ssChanged":7,"recentRows":0,"decisionPenalty":18566,"proposedPenalty":26846},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"247257","CITATION_NO":"8119537","CITATION_ISSUE_DT":"02/17/2011","DOCKET_NO":"WEVA 2011-1727","DECISION_DT":"11/07/2013","CFR_STANDARD_CODE":"75.1700","ORIGINAL_SIG_SUB_IND":"N","DECISION_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"3996.00","DECISION_PENALTY_AMT":"2997.00","sourceDate":"2011-02-17"},{"SOURCE_ROW_NUMBER":"79225","CITATION_NO":"8113808","CITATION_ISSUE_DT":"08/26/2010","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","CFR_STANDARD_CODE":"75.517","ORIGINAL_SIG_SUB_IND":"Y","DECISION_SIG_SUB_IND":"Y","PROPOSED_PENALTY_AMT":"1203.00","DECISION_PENALTY_AMT":"1044.00","sourceDate":"2010-08-26"},{"SOURCE_ROW_NUMBER":"361770","CITATION_NO":"8113805","CITATION_ISSUE_DT":"08/25/2010","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","CFR_STANDARD_CODE":"75.512","ORIGINAL_SIG_SUB_IND":"Y","DECISION_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"425.00","DECISION_PENALTY_AMT":"200.00","sourceDate":"2010-08-25"},{"SOURCE_ROW_NUMBER":"189273","CITATION_NO":"8113804","CITATION_ISSUE_DT":"08/25/2010","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","CFR_STANDARD_CODE":"75.202(a)","ORIGINAL_SIG_SUB_IND":"Y","DECISION_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"425.00","DECISION_PENALTY_AMT":"200.00","sourceDate":"2010-08-25"},{"SOURCE_ROW_NUMBER":"189272","CITATION_NO":"8113803","CITATION_ISSUE_DT":"08/24/2010","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","CFR_STANDARD_CODE":"75.807","ORIGINAL_SIG_SUB_IND":"N","DECISION_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"285.00","DECISION_PENALTY_AMT":"285.00","sourceDate":"2010-08-24"},{"SOURCE_ROW_NUMBER":"76285","CITATION_NO":"8113800","CITATION_ISSUE_DT":"08/18/2010","DOCKET_NO":"WEVA 2011-1092","DECISION_DT":"07/31/2012","CFR_STANDARD_CODE":"75.220(a)(1)","ORIGINAL_SIG_SUB_IND":"Y","DECISION_SIG_SUB_IND":"Y","PROPOSED_PENALTY_AMT":"2000.00","DECISION_PENALTY_AMT":"1000.00","sourceDate":"2010-08-18"},{"SOURCE_ROW_NUMBER":"21049","CITATION_NO":"8113801","CITATION_ISSUE_DT":"08/18/2010","DOCKET_NO":"WEVA 2011-1092","DECISION_DT":"07/31/2012","CFR_STANDARD_CODE":"75.360(b)(3)","ORIGINAL_SIG_SUB_IND":"Y","DECISION_SIG_SUB_IND":"Y","PROPOSED_PENALTY_AMT":"2000.00","DECISION_PENALTY_AMT":"1000.00","sourceDate":"2010-08-18"},{"SOURCE_ROW_NUMBER":"359976","CITATION_NO":"8113789","CITATION_ISSUE_DT":"08/09/2010","DOCKET_NO":"WEVA 2011-1093","DECISION_DT":"04/11/2012","CFR_STANDARD_CODE":"75.220(a)(1)","ORIGINAL_SIG_SUB_IND":"Y","DECISION_SIG_SUB_IND":"Y","PROPOSED_PENALTY_AMT":"425.00","DECISION_PENALTY_AMT":"325.00","sourceDate":"2010-08-09"},{"SOURCE_ROW_NUMBER":"357820","CITATION_NO":"8113792","CITATION_ISSUE_DT":"08/09/2010","DOCKET_NO":"WEVA 2011-288","DECISION_DT":"01/31/2013","CFR_STANDARD_CODE":"75.512","ORIGINAL_SIG_SUB_IND":"N","DECISION_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":"100.00","sourceDate":"2010-08-09"},{"SOURCE_ROW_NUMBER":"79185","CITATION_NO":"8095294","CITATION_ISSUE_DT":"08/05/2010","DOCKET_NO":"WEVA 2011-34","DECISION_DT":"01/31/2013","CFR_STANDARD_CODE":"75.1100-1(f)(1)","ORIGINAL_SIG_SUB_IND":"N","DECISION_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":"100.00","sourceDate":"2010-08-05"},{"SOURCE_ROW_NUMBER":"135365","CITATION_NO":"8113786","CITATION_ISSUE_DT":"08/02/2010","DOCKET_NO":"WEVA 2011-1093","DECISION_DT":"04/11/2012","CFR_STANDARD_CODE":"75.220(a)(1)","ORIGINAL_SIG_SUB_IND":"Y","DECISION_SIG_SUB_IND":"Y","PROPOSED_PENALTY_AMT":"425.00","DECISION_PENALTY_AMT":"325.00","sourceDate":"2010-08-02"},{"SOURCE_ROW_NUMBER":"417803","CITATION_NO":"8113780","CITATION_ISSUE_DT":"07/29/2010","DOCKET_NO":"WEVA 2011-34","DECISION_DT":"01/31/2013","CFR_STANDARD_CODE":"75.1103-11","ORIGINAL_SIG_SUB_IND":"N","PROPOSED_PENALTY_AMT":"100.00","DECISION_PENALTY_AMT":".00","sourceDate":"2010-07-29"}]},{"id":"msha-contractor-production-quarterly","name":"Contractor Employment and Production — Quarterly","domains":["contractors","production","safety"],"products":["contractor exposure denominator","productivity","presence windows"],"rowCount":125,"firstDate":null,"lastDate":null,"metrics":{"linkedContractors":3,"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":37,"firstDate":null,"lastDate":null,"metrics":{"linkedContractors":3,"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":3,"firstDate":"2005-11-16","lastDate":"2005-11-16","metrics":{"recentRows":0,"currentOperatorTenures":3,"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":"2008-02-29","lastDate":"2013-06-13","metrics":{"inspectors":71,"recentRows":0,"onSiteHours":1020.25,"inspectionHours":1634.25,"inspectionSamples":133},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"414776","EVENT_NO":"6299070","INSPECTION_BEGIN_DT":"06/13/2013","INSPECTION_END_DT":"06/20/2013","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"10.5","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2013-06-13"},{"SOURCE_ROW_NUMBER":"43415","EVENT_NO":"6295586","INSPECTION_BEGIN_DT":"01/02/2013","INSPECTION_END_DT":"01/17/2013","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"12.5","SUM_TOTAL_ON_SITE_HOURS":"3.5","sourceDate":"2013-01-02"},{"SOURCE_ROW_NUMBER":"440002","EVENT_NO":"6295581","INSPECTION_BEGIN_DT":"10/02/2012","INSPECTION_END_DT":"10/02/2012","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"6.5","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2012-10-02"},{"SOURCE_ROW_NUMBER":"444544","EVENT_NO":"6296266","INSPECTION_BEGIN_DT":"07/10/2012","INSPECTION_END_DT":"07/16/2012","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"2","SUM_TOTAL_INSP_HOURS":"5.5","SUM_TOTAL_ON_SITE_HOURS":"2.5","sourceDate":"2012-07-10"},{"SOURCE_ROW_NUMBER":"93862","EVENT_NO":"6295509","INSPECTION_BEGIN_DT":"04/09/2012","INSPECTION_END_DT":"04/30/2012","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"6","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2012-04-09"},{"SOURCE_ROW_NUMBER":"262466","EVENT_NO":"4123648","INSPECTION_BEGIN_DT":"01/03/2012","INSPECTION_END_DT":"01/04/2012","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"8.5","SUM_TOTAL_ON_SITE_HOURS":"4","sourceDate":"2012-01-03"},{"SOURCE_ROW_NUMBER":"737242","EVENT_NO":"5911003","INSPECTION_BEGIN_DT":"10/05/2011","INSPECTION_END_DT":"11/02/2011","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"2","sourceDate":"2011-10-05"},{"SOURCE_ROW_NUMBER":"1085648","EVENT_NO":"6288791","INSPECTION_BEGIN_DT":"08/02/2011","INSPECTION_END_DT":"08/03/2011","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"0","SUM_TOTAL_INSP_HOURS":"0","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2011-08-02"},{"SOURCE_ROW_NUMBER":"312450","EVENT_NO":"6284942","INSPECTION_BEGIN_DT":"05/23/2011","INSPECTION_END_DT":"05/23/2011","ACTIVITY_CODE":"E01","ACTIVITY":"Regular Safety and Health Inspection","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"5","SUM_TOTAL_ON_SITE_HOURS":"1.5","sourceDate":"2011-05-23"},{"SOURCE_ROW_NUMBER":"1093440","EVENT_NO":"6286218","INSPECTION_BEGIN_DT":"03/07/2011","INSPECTION_END_DT":"03/15/2011","ACTIVITY_CODE":"E08","ACTIVITY":"Non-Injury Accident Investigation","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"9.5","SUM_TOTAL_ON_SITE_HOURS":"3.5","sourceDate":"2011-03-07"},{"SOURCE_ROW_NUMBER":"626027","EVENT_NO":"6286217","INSPECTION_BEGIN_DT":"02/23/2011","INSPECTION_END_DT":"02/25/2011","ACTIVITY_CODE":"E08","ACTIVITY":"Non-Injury Accident Investigation","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"10","SUM_TOTAL_ON_SITE_HOURS":"4.5","sourceDate":"2011-02-23"},{"SOURCE_ROW_NUMBER":"1143823","EVENT_NO":"6286216","INSPECTION_BEGIN_DT":"02/17/2011","INSPECTION_END_DT":"02/23/2011","ACTIVITY_CODE":"E08","ACTIVITY":"Non-Injury Accident Investigation","NBR_INSPECTOR":"1","SUM_TOTAL_INSP_HOURS":"2","SUM_TOTAL_ON_SITE_HOURS":"0","sourceDate":"2011-02-17"}]},{"id":"msha-mine-production-quarterly","name":"Mine Employment and Production — Quarterly","domains":["production","safety","compliance"],"products":["production trend","employee hours","rate denominators","seasonality"],"rowCount":81,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2012-Q2":{"hours":0,"employees":0,"production":0},"2012-Q1":{"hours":0,"employees":0,"production":0},"2011-Q4":{"hours":0,"employees":0,"production":0},"2011-Q3":{"hours":0,"employees":0,"production":0},"2011-Q2":{"hours":0,"employees":0,"production":0},"2011-Q1":{"hours":29171,"employees":51,"production":48498},"2010-Q4":{"hours":27487,"employees":54,"production":54015},"2010-Q3":{"hours":31190,"employees":57,"production":60954},"2010-Q2":{"hours":29270,"employees":58,"production":69855},"2010-Q1":{"hours":29250,"employees":58,"production":86040},"2009-Q4":{"hours":26404,"employees":57,"production":108724},"2009-Q3":{"hours":35854,"employees":70,"production":67225}},"recentRecords":[]},{"id":"msha-mine-production-yearly","name":"Mine Employment and Production — Yearly","domains":["production","safety","compliance"],"products":["annual trend","backfill","quarterly reconciliation"],"rowCount":7,"firstDate":null,"lastDate":null,"metrics":{},"periods":{"2008":{"hours":924,"employees":3,"production":2138},"2009":{"hours":83669,"employees":47,"production":214585},"2010":{"hours":117197,"employees":57,"production":270864},"2011":{"hours":29171,"employees":51,"production":48498}},"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":10,"firstDate":"2009-06-24","lastDate":"2010-08-24","metrics":{"recentRows":0,"doseOver100":3,"actDoseTotal":925,"pelDoseTotal":791},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"256279","EVENT_NO":"6289403","SURVEY_DATE":"08/24/2010","OCCUPATION_CD_DESC":"SHUTTLE CAR OPERATOR (STANDARD SIDE)","MACHINE_CD":"37","MANUFACTURER_CD":"058","ACT_DOSE_85":"44","PEL_DOSE_90":"31","SURVEY_TYPE":"I","sourceDate":"2010-08-24"},{"SOURCE_ROW_NUMBER":"256278","EVENT_NO":"6289403","SURVEY_DATE":"08/24/2010","OCCUPATION_CD_DESC":"SHUTTLE CAR OPERATOR (STANDARD SIDE)","MACHINE_CD":"37","MANUFACTURER_CD":"058","ACT_DOSE_85":"39","PEL_DOSE_90":"22","SURVEY_TYPE":"I","sourceDate":"2010-08-24"},{"SOURCE_ROW_NUMBER":"256277","EVENT_NO":"6289403","SURVEY_DATE":"08/24/2010","OCCUPATION_CD_DESC":"ROOF BOLTER (SINGLE HEAD)","MACHINE_CD":"30","MANUFACTURER_CD":"039","ACT_DOSE_85":"137","PEL_DOSE_90":"109","SURVEY_TYPE":"I","sourceDate":"2010-08-24"},{"SOURCE_ROW_NUMBER":"256276","EVENT_NO":"6289403","SURVEY_DATE":"08/24/2010","OCCUPATION_CD_DESC":"ROOF BOLTER (SINGLE HEAD)","MACHINE_CD":"30","MANUFACTURER_CD":"039","ACT_DOSE_85":"119","PEL_DOSE_90":"104","SURVEY_TYPE":"I","sourceDate":"2010-08-24"},{"SOURCE_ROW_NUMBER":"256275","EVENT_NO":"6289403","SURVEY_DATE":"08/24/2010","OCCUPATION_CD_DESC":"CONTINUOUS MINER OPERATOR","MACHINE_CD":"06","MANUFACTURER_CD":"033","ACT_DOSE_85":"89","PEL_DOSE_90":"83","SURVEY_TYPE":"I","sourceDate":"2010-08-24"},{"SOURCE_ROW_NUMBER":"256274","EVENT_NO":"4120883","SURVEY_DATE":"06/24/2009","OCCUPATION_CD_DESC":"ROOF BOLTER (TWIN HEAD) (INTAKE SIDE)","MACHINE_CD":"30","MANUFACTURER_CD":"039","ACT_DOSE_85":"51","PEL_DOSE_90":"46","SURVEY_TYPE":"I","sourceDate":"2009-06-24"},{"SOURCE_ROW_NUMBER":"256273","EVENT_NO":"4120883","SURVEY_DATE":"06/24/2009","OCCUPATION_CD_DESC":"SUPPLY MAN","MACHINE_CD":"38","MANUFACTURER_CD":"119","ACT_DOSE_85":"34","PEL_DOSE_90":"30","SURVEY_TYPE":"I","sourceDate":"2009-06-24"},{"SOURCE_ROW_NUMBER":"256272","EVENT_NO":"4120883","SURVEY_DATE":"06/24/2009","OCCUPATION_CD_DESC":"SHUTTLE CAR OPERATOR (STANDARD SIDE)","MACHINE_CD":"37","MANUFACTURER_CD":"119","ACT_DOSE_85":"67","PEL_DOSE_90":"60","SURVEY_TYPE":"I","sourceDate":"2009-06-24"},{"SOURCE_ROW_NUMBER":"256271","EVENT_NO":"4120883","SURVEY_DATE":"06/24/2009","OCCUPATION_CD_DESC":"ROOF BOLTER (TWIN HEAD) (INTAKE SIDE)","MACHINE_CD":"30","MANUFACTURER_CD":"039","ACT_DOSE_85":"73","PEL_DOSE_90":"64","SURVEY_TYPE":"I","sourceDate":"2009-06-24"},{"SOURCE_ROW_NUMBER":"256270","EVENT_NO":"4120883","SURVEY_DATE":"06/24/2009","OCCUPATION_CD_DESC":"CONTINUOUS MINER OPERATOR","MACHINE_CD":"06","MANUFACTURER_CD":"033","ACT_DOSE_85":"272","PEL_DOSE_90":"242","SURVEY_TYPE":"I","sourceDate":"2009-06-24"}]},{"id":"msha-quartz-samples","name":"Quartz Samples — Coal","domains":["health","safety"],"products":["quartz exposure trends","occupation context","applicable-rule linkage"],"rowCount":8,"firstDate":"2009-08-04","lastDate":"2011-01-25","metrics":{"recentRows":0,"voidSamples":1,"maxQuartzPct":20.4,"validSamples":7,"quartzPctTotal":75},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"42795","CASSETTE_NO":"57911224","SAMPLE_DT":"01/25/2011","QUARTZ_PCT":"06.6","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2011-01-25"},{"SOURCE_ROW_NUMBER":"136828","CASSETTE_NO":"51075586","SAMPLE_DT":"11/17/2010","QUARTZ_PCT":"05.0","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2010-11-17"},{"SOURCE_ROW_NUMBER":"72762","CASSETTE_NO":"51053762","SAMPLE_DT":"04/23/2010","QUARTZ_PCT":"09.3","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2010-04-23"},{"SOURCE_ROW_NUMBER":"115777","CASSETTE_NO":"51032973","SAMPLE_DT":"04/01/2010","QUARTZ_PCT":"12.5","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2010-04-01"},{"SOURCE_ROW_NUMBER":"70707","CASSETTE_NO":"57833649","SAMPLE_DT":"03/05/2010","QUARTZ_PCT":"20.4","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2010-03-05"},{"SOURCE_ROW_NUMBER":"131236","CASSETTE_NO":"57823933","SAMPLE_DT":"10/02/2009","QUARTZ_PCT":"06.7","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2009-10-02"},{"SOURCE_ROW_NUMBER":"88505","CASSETTE_NO":"51032986","SAMPLE_DT":"08/31/2009","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"CASSETTE DID NOT MATCH CARD","sourceDate":"2009-08-31"},{"SOURCE_ROW_NUMBER":"127416","CASSETTE_NO":"57823961","SAMPLE_DT":"08/04/2009","QUARTZ_PCT":"14.5","OCC_CODE_DESC":"CONTINUOUS MINER OPERATOR","SAMPLE_TYPE_DESC":"DESIGNATED OCCUPATION","VOID_CD_DESC":"SAMPLE NOT VOIDED","sourceDate":"2009-08-04"}]},{"id":"msha-violations","name":"Violations","domains":["compliance","safety","legal"],"products":["citation and order record","condition text","Title 30 linkage","abatement patterns"],"rowCount":119,"firstDate":"2008-12-11","lastDate":"2013-01-09","metrics":{"ss":24,"amountDue":40343,"contested":19,"amountPaid":40343,"recentRows":0,"section104d":1,"unterminated":0,"proposedPenalty":48423},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"2891383","VIOLATION_NO":"7188284","VIOLATION_ISSUE_DT":"01/09/2013","SIG_SUB":"Y","PART_SECTION":"77.205(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"01/09/2013","PROPOSED_PENALTY":"1304","AMOUNT_DUE":"1304","AMOUNT_PAID":"1304","CONTESTED_IND":"N","sourceDate":"2013-01-09"},{"SOURCE_ROW_NUMBER":"2891388","VIOLATION_NO":"8121426","VIOLATION_ISSUE_DT":"03/01/2011","SIG_SUB":"N","PART_SECTION":"75.512","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"03/02/2011","PROPOSED_PENALTY":"108","AMOUNT_DUE":"108","AMOUNT_PAID":"108","CONTESTED_IND":"N","sourceDate":"2011-03-01"},{"SOURCE_ROW_NUMBER":"2891389","VIOLATION_NO":"8121929","VIOLATION_ISSUE_DT":"02/22/2011","SIG_SUB":"N","PART_SECTION":"75.1100-3","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"3","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"02/22/2011","PROPOSED_PENALTY":"138","AMOUNT_DUE":"138","AMOUNT_PAID":"138","CONTESTED_IND":"N","sourceDate":"2011-02-22"},{"SOURCE_ROW_NUMBER":"2891384","VIOLATION_NO":"8119537","VIOLATION_ISSUE_DT":"02/17/2011","SIG_SUB":"N","PART_SECTION":"75.1700","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"9","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"02/25/2011","PROPOSED_PENALTY":"3996","AMOUNT_DUE":"2997","AMOUNT_PAID":"2997","CONTESTED_IND":"N","sourceDate":"2011-02-17"},{"SOURCE_ROW_NUMBER":"2891399","VIOLATION_NO":"8119536","VIOLATION_ISSUE_DT":"02/04/2011","CIT_ORD_SAFE":"Order","NO_AFFECTED":"0","TERMINATION_DT":"02/09/2011","CONTESTED_IND":"N","sourceDate":"2011-02-04"},{"SOURCE_ROW_NUMBER":"2891387","VIOLATION_NO":"8121414","VIOLATION_ISSUE_DT":"01/25/2011","SIG_SUB":"N","PART_SECTION":"72.630(b)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"2","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"01/25/2011","PROPOSED_PENALTY":"117","AMOUNT_DUE":"117","AMOUNT_PAID":"117","CONTESTED_IND":"N","sourceDate":"2011-01-25"},{"SOURCE_ROW_NUMBER":"2891386","VIOLATION_NO":"8121412","VIOLATION_ISSUE_DT":"01/18/2011","SIG_SUB":"N","PART_SECTION":"75.1101","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"01/25/2011","PROPOSED_PENALTY":"108","AMOUNT_DUE":"108","AMOUNT_PAID":"108","CONTESTED_IND":"N","sourceDate":"2011-01-18"},{"SOURCE_ROW_NUMBER":"2891385","VIOLATION_NO":"8121411","VIOLATION_ISSUE_DT":"01/18/2011","SIG_SUB":"N","PART_SECTION":"75.1731(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"01/18/2011","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2011-01-18"},{"SOURCE_ROW_NUMBER":"2891499","VIOLATION_NO":"8121403","VIOLATION_ISSUE_DT":"11/10/2010","SIG_SUB":"Y","PART_SECTION":"72.630(b)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"Permanent","NO_AFFECTED":"2","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/17/2010","PROPOSED_PENALTY":"873","AMOUNT_DUE":"873","AMOUNT_PAID":"873","CONTESTED_IND":"N","sourceDate":"2010-11-10"},{"SOURCE_ROW_NUMBER":"2891496","VIOLATION_NO":"8095320","VIOLATION_ISSUE_DT":"11/03/2010","SIG_SUB":"N","PART_SECTION":"77.1606(c)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/10/2010","PROPOSED_PENALTY":"108","AMOUNT_DUE":"108","AMOUNT_PAID":"108","CONTESTED_IND":"N","sourceDate":"2010-11-03"},{"SOURCE_ROW_NUMBER":"2891495","VIOLATION_NO":"8095184","VIOLATION_ISSUE_DT":"11/03/2010","SIG_SUB":"N","PART_SECTION":"77.1606(c)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/10/2010","PROPOSED_PENALTY":"1026","AMOUNT_DUE":"1026","AMOUNT_PAID":"1026","CONTESTED_IND":"N","sourceDate":"2010-11-03"},{"SOURCE_ROW_NUMBER":"2891498","VIOLATION_NO":"8103890","VIOLATION_ISSUE_DT":"10/14/2010","SIG_SUB":"N","PART_SECTION":"75.342(a)(4)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Permanent","NO_AFFECTED":"10","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"10/14/2010","PROPOSED_PENALTY":"499","AMOUNT_DUE":"499","AMOUNT_PAID":"499","CONTESTED_IND":"N","sourceDate":"2010-10-14"}]}],"safety":{"href":"/api/v1/mines/4609126/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4609126/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 77.205","heading":"Travelways at surface installations.","id":"77.205","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.205","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":"C","subpartHeading":"Subpart C—Surface Installations","text":"(a) Safe means of access shall be provided and maintained to all working places.\n\n(b) Travelways and platforms or other means of access to areas where persons are required to travel or work, shall be kept clear of all extraneous material and other stumbling or slipping hazards.\n\n(c) Inclined travelways shall be constructed of nonskid material or equipped with cleats.\n\n(d) Regularly used travelways shall be sanded, salted, or cleared of snow and ice as soon as practicable.\n\n(e) Crossovers, elevated walkways, elevated ramps, and stairways shall be of substantial construction, provided with handrails, and maintained in good condition. Where necessary toeboards shall be provided.\n\n(f) Crossovers shall be provided where it is necessary to cross conveyors.\n\n(g) Moving conveyors shall be crossed only at designated crossover points.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.512","heading":"Electric equipment; examination, testing and maintenance.","id":"75.512","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.512","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"F","subpartHeading":"Subpart F—Electrical Equipment—General","text":"[Statutory Provision]\n\nAll electric equipment shall be frequently examined, tested, and properly maintained by a qualified person to assure safe operating conditions. When a potentially dangerous condition is found on electric equipment, such equipment shall be removed from service until such condition is corrected. A record of such examinations shall be kept and made available to an authorized representative of the Secretary and to the miners in such mine.\n\n[35 FR 17890, Nov. 20, 1970, as amended at 60 FR 33723, June 29, 1995]","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.1100-3","heading":"Condition and examination of firefighting equipment.","id":"75.1100-3","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1100-3","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"L","subpartHeading":"Subpart L—Fire Protection","text":"All firefighting equipment shall be maintained in a usable and operative condition. Chemical extinguishers shall be examined every 6 months and the date of the examination shall be written on a permanent tag attached to the extinguisher.\n\n[35 FR 17890, Nov. 20, 1970, as amended at 60 FR 33723, June 29, 1995]","occurrenceCount":1},{"chapter":"I","heading":"Oil and gas wells.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1700","part":"75","subchapter":"O","subpart":"R","id":"75.1700","citation":"30 CFR 75.1700","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 72.630","heading":"Drill dust control at underground areas of underground mines.","id":"72.630","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-72/subpart-E/section-72.630","part":"72","partHeading":"PART 72—HEALTH STANDARDS FOR COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"E","subpartHeading":"Subpart E—Miscellaneous","text":"(a) Dust resulting from drilling in rock shall be controlled by use of permissible dust collectors, or by water, or water with a wetting agent, or by ventilation, or by any other method or device approved by the Secretary that is as effective in controlling the dust.\n\n(b) Dust collectors. Dust collectors shall be maintained in permissible and operating condition. Dust collectors approved under Part 33—Dust Collectors for Use in Connection with Rock Drilling in Coal Mines of this title or under Bureau of Mines Schedule 25B are permissible dust collectors for the purpose of this section.\n\n(c) Water control. Water used to control dust from drilling rock shall be applied through a hollow drill steel or stem or by the flooding of vertical drill holes in the floor.\n\n(d) Ventilation control. To adequately control dust from drilling rock, the air current shall be so directed that the dust is readily dispersed and carried away from the drill operator or any other miners in the area.","occurrenceCount":2},{"chapter":"I","heading":"Deluge-type water sprays, foam generators; main and secondary belt-conveyor drives.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1101","part":"75","subchapter":"O","subpart":"L","id":"75.1101","citation":"30 CFR 75.1101","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.1731","heading":"Maintenance of belt conveyors and belt conveyor entries.","id":"75.1731","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1731","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) Damaged rollers, or other damaged belt conveyor components, which pose a fire hazard must be immediately repaired or replaced. All other damaged rollers, or other damaged belt conveyor components, must be repaired or replaced.\n\n(b) Conveyor belts must be properly aligned to prevent the moving belt from rubbing against the structure or components.\n\n(c) Materials shall not be allowed in the belt conveyor entry where the material may contribute to a frictional heating hazard.\n\n(d) Splicing of any approved conveyor belt must maintain flame-resistant properties of the belt.\n\n[73 FR 80616, Dec. 31, 2008]","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.1606","heading":"Loading and haulage equipment; inspection and maintenance.","id":"77.1606","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606","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) Mobile loading and haulage equipment shall be inspected by a competent person before such equipment is placed in operation. Equipment defects affecting safety shall be recorded and reported to the mine operator.\n\n(b) Carriers on aerial tramways, including loading and unloading mechanisms, shall be inspected each shift; brakes shall be inspected daily; ropes and supports shall be inspected as recommended by the manufacturer or as physical conditions warrant. Equipment defects affecting safety shall be reported to the mine operator.\n\n(c) Equipment defects affecting safety shall be corrected before the equipment is used.","occurrenceCount":2},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.342","heading":"Methane monitors.","id":"75.342","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.342","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) MSHA approved methane monitors shall be installed on all face cutting machines, continuous miners, longwall face equipment, loading machines, and other mechanized equipment used to extract or load coal within the working place.\n\n(2) The sensing device for methane monitors on longwall shearing machines shall be installed at the return air end of the longwall face. An additional sensing device also shall be installed on the longwall shearing machine, downwind and as close to the cutting head as practicable. An alternative location or locations for the sensing device required on the longwall shearing machine may be approved in the ventilation plan.\n\n(3) The sensing devices of methane monitors shall be installed as close to the working face as practicable.\n\n(4) Methane monitors shall be maintained in permissible and proper operating condition and shall be calibrated with a known air-methane mixture at least once every 31 days. To assure that methane monitors are properly maintained and calibrated, the operator shall:\n\n(i) Use persons properly trained in the maintenance, calibration, and permissibility of methane monitors to calibrate and maintain the devices.\n\n(ii) Maintain a record of all calibration tests of methane monitors. Records shall be maintained in a secure book that is not susceptible to alteration or electronically in a computer system so as to be secure and not susceptible to alteration.\n\n(iii) Retain the record of calibration tests for 1 year from the date of the test. Records shall be retained at a surface location at the mine and made available for inspection by authorized representatives of the Secretary and the representative of miners.\n\n(b)(1) When the methane concentration at any methane monitor reaches 1.0 percent the monitor shall give a warning signal.\n\n(2) The warning signal device of the methane monitor shall be visible to a person who can deenergize electric equipment or shut down diesel-powered equipment on which the monitor is mounted.\n\n(c) The methane monitor shall automatically deenergize electric equipment or shut down diesel-powered equipment on which it is mounted when—\n\n(1) The methane concentration at any methane monitor reaches 2.0 percent; or\n\n(2) The monitor is not operating properly.\n\n[61 FR 9829, Mar. 11, 1996, as amended at 61 FR 55527, Oct. 25, 1996]","occurrenceCount":1}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"4609126","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}