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patterns"],"rowCount":97,"firstDate":"2011-05-12","lastDate":"2013-04-25","metrics":{"ss":25,"amountDue":25133,"contested":0,"amountPaid":25133,"recentRows":0,"section104d":1,"unterminated":0,"proposedPenalty":48717},"periods":{},"recentRecords":[{"SOURCE_ROW_NUMBER":"2440738","VIOLATION_NO":"8198635","VIOLATION_ISSUE_DT":"04/25/2013","SIG_SUB":"N","PART_SECTION":"77.1110","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"04/25/2013","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2013-04-25"},{"SOURCE_ROW_NUMBER":"2440713","VIOLATION_NO":"8178785","VIOLATION_ISSUE_DT":"01/25/2013","SIG_SUB":"N","PART_SECTION":"75.1101-6","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"8","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"01/29/2013","PROPOSED_PENALTY":"190","AMOUNT_DUE":"190","AMOUNT_PAID":"190","CONTESTED_IND":"N","sourceDate":"2013-01-25"},{"SOURCE_ROW_NUMBER":"2440712","VIOLATION_NO":"8178784","VIOLATION_ISSUE_DT":"01/25/2013","SIG_SUB":"Y","PART_SECTION":"75.220(a)(1)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Highly","INJ_ILLNESS":"Fatal","NO_AFFECTED":"2","NEGLIGENCE":"HighNegligence","TERMINATION_DT":"01/29/2013","PROPOSED_PENALTY":"31100","AMOUNT_DUE":"10000","AMOUNT_PAID":"10000","CONTESTED_IND":"N","sourceDate":"2013-01-25"},{"SOURCE_ROW_NUMBER":"2440711","VIOLATION_NO":"8178780","VIOLATION_ISSUE_DT":"01/03/2013","SIG_SUB":"N","PART_SECTION":"75.1712-3(a)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"6","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"01/03/2013","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2013-01-03"},{"SOURCE_ROW_NUMBER":"2440710","VIOLATION_NO":"8178779","VIOLATION_ISSUE_DT":"01/03/2013","SIG_SUB":"N","PART_SECTION":"75.360(g)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"0","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"01/03/2013","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2013-01-03"},{"SOURCE_ROW_NUMBER":"2440806","VIOLATION_NO":"8181696","VIOLATION_ISSUE_DT":"12/20/2012","SIG_SUB":"N","PART_SECTION":"75.403","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"Fatal","NO_AFFECTED":"10","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"12/20/2012","PROPOSED_PENALTY":"807","AMOUNT_DUE":"607","AMOUNT_PAID":"607","CONTESTED_IND":"N","sourceDate":"2012-12-20"},{"SOURCE_ROW_NUMBER":"2440802","VIOLATION_NO":"8181695","VIOLATION_ISSUE_DT":"12/11/2012","SIG_SUB":"Y","PART_SECTION":"75.517","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Reasonably","INJ_ILLNESS":"Fatal","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"12/11/2012","PROPOSED_PENALTY":"1026","AMOUNT_DUE":"768","AMOUNT_PAID":"768","CONTESTED_IND":"N","sourceDate":"2012-12-11"},{"SOURCE_ROW_NUMBER":"2440800","VIOLATION_NO":"7319100","VIOLATION_ISSUE_DT":"11/28/2012","SIG_SUB":"N","PART_SECTION":"75.1600-2(e)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"NoLikelihood","INJ_ILLNESS":"NoLostDays","NO_AFFECTED":"9","NEGLIGENCE":"LowNegligence","TERMINATION_DT":"11/28/2012","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2012-11-28"},{"SOURCE_ROW_NUMBER":"2440799","VIOLATION_NO":"6639219","VIOLATION_ISSUE_DT":"11/09/2012","SIG_SUB":"N","PART_SECTION":"75.1910(d)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/09/2012","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2012-11-09"},{"SOURCE_ROW_NUMBER":"2440798","VIOLATION_NO":"6639218","VIOLATION_ISSUE_DT":"11/09/2012","SIG_SUB":"N","PART_SECTION":"75.1909(a)(10)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/09/2012","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2012-11-09"},{"SOURCE_ROW_NUMBER":"2440797","VIOLATION_NO":"6639217","VIOLATION_ISSUE_DT":"11/09/2012","SIG_SUB":"N","PART_SECTION":"75.1910(g)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/09/2012","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2012-11-09"},{"SOURCE_ROW_NUMBER":"2440796","VIOLATION_NO":"6639216","VIOLATION_ISSUE_DT":"11/09/2012","SIG_SUB":"N","PART_SECTION":"75.1910(i)","CIT_ORD_SAFE":"Citation","LIKELIHOOD":"Unlikely","INJ_ILLNESS":"LostDays","NO_AFFECTED":"1","NEGLIGENCE":"ModNegligence","TERMINATION_DT":"11/09/2012","PROPOSED_PENALTY":"100","AMOUNT_DUE":"100","AMOUNT_PAID":"100","CONTESTED_IND":"N","sourceDate":"2012-11-09"}]}],"safety":{"href":"/api/v1/mines/4407277/safety","description":"Full-period safety series, top CFR sections and paginated activity. Requires PostgreSQL."},"silica":{"href":"/api/v1/mines/4407277/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 77.1110","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":1},{"chapter":"I","heading":"Water sprinkler systems; general.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1101-6","part":"75","subchapter":"O","subpart":"L","id":"75.1101-6","citation":"30 CFR 75.1101-6","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 75.220","heading":"Roof control plan.","id":"75.220","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.220","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)(1) Each mine operator shall develop and follow a roof control plan, approved by the District Manager, that is suitable to the prevailing geological conditions, and the mining system to be used at the mine. Additional measures shall be taken to protect persons if unusual hazards are encountered.\n\n(2) The proposed roof control plan and any revisions to the plan shall be submitted, in writing, to the District Manager. When revisions to a roof control plan are proposed, only the revised pages need to be submitted unless otherwise specified by the District Manager.\n\n(b)(1) The mine operator will be notified in writing of the approval or denial of approval of a proposed roof control plan or proposed revision.\n\n(2) When approval of a proposed plan or revision is denied, the deficiencies of the plan or revision and recommended changes will be specified and the mine operator will be afforded an opportunity to discuss the deficiencies and changes with the District Manager.\n\n(3) Before new support materials, devices or systems other than roof bolts and accessories, are used as the only means of roof support, the District Manager may require that their effectiveness be demonstrated by experimental installations.\n\n(c) No proposed roof control plan or revision to a roof control plan shall be implemented before it is approved.\n\n(d) Before implementing an approved revision to a roof control plan, all persons who are affected by the revision shall be instructed in its provisions.\n\n(e) The approved roof control plan and any revisions shall be available to the miners and representative of miners at the mine.\n\n[53 FR 2375, Jan. 27, 1988; 53 FR 11395, Apr. 6, 1988, as amended at 60 FR 33723, June 29, 1995; 71 FR 16668, Apr. 3, 2006]","occurrenceCount":1},{"chapter":"I","heading":"Minimum requirements of surface bathing facilities, change rooms, and sanitary toilet facilities.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1712-3","part":"75","subchapter":"O","subpart":"R","id":"75.1712-3","citation":"30 CFR 75.1712-3","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 75.360","heading":"Preshift examination at fixed intervals.","id":"75.360","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.360","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) Except as provided in paragraph (a)(2) of this section, a certified person designated by the operator must make a preshift examination within 3 hours preceding the beginning of any 8-hour interval during which any person is scheduled to work or travel underground. No person other than certified examiners may enter or remain in any underground area unless a preshift examination has been completed for the established 8-hour interval. The operator must establish 8-hour intervals of time subject to the required preshift examinations.\n\n(2) Preshift examinations of areas where pumpers are scheduled to work or travel shall not be required prior to the pumper entering the areas if the pumper is a certified person and the pumper conducts an examination for hazardous conditions and violations of the mandatory health or safety standards referenced in paragraph (b)(11) of this section, tests for methane and oxygen deficiency, and determines if the air is moving in its proper direction in the area where the pumper works or travels. The examination of the area must be completed before the pumper performs any other work. A record of all hazardous conditions and violations of the mandatory health or safety standards found by the pumper shall be made and retained in accordance with § 75.363 of this part.\n\n(b) The person conducting the preshift examination shall examine for hazardous conditions and violations of the mandatory health or safety standards referenced in paragraph (b)(11) of this section, test for methane and oxygen deficiency, and determine if the air is moving in its proper direction at the following locations:\n\n(1) Roadways, travelways and track haulageways where persons are scheduled, prior to the beginning of the preshift examination, to work or travel during the oncoming shift.\n\n(2) Belt conveyors that will be used to transport persons during the oncoming shift and the entries in which these belt conveyors are located.\n\n(3) Working sections and areas where mechanized mining equipment is being installed or removed, if anyone is scheduled to work on the section or in the area during the oncoming shift. The scope of the examination shall include the working places, approaches to worked-out areas and ventilation controls on these sections and in these areas, and the examination shall include tests of the roof, face and rib conditions on these sections and in these areas.\n\n(4) Approaches to worked-out areas along intake air courses and at the entries used to carry air into worked-out areas if the intake air passing the approaches is used to ventilate working sections where anyone is scheduled to work during the oncoming shift. The examination of the approaches to the worked-out areas shall be made in the intake air course immediately inby and outby each entry used to carry air into the worked-out area. An examination of the entries used to carry air into the worked-out areas shall be conducted at a point immediately inby the intersection of each entry with the intake air course.\n\n(5) Seals along intake air courses where intake air passes by a seal to ventilate working sections where anyone is scheduled to work during the oncoming shift.\n\n(6)(i) Entries and rooms developed after November 15, 1992, and developed more than 2 crosscuts off an intake air course without permanent ventilation controls where intake air passes through or by these entries or rooms to reach a working section where anyone is scheduled to work during the oncoming shift; and,\n\n(ii) Entries and rooms developed after November 15, 1992, and driven more than 20 feet off an intake air course without a crosscut and without permanent ventilation controls where intake air passes through or by these entries or rooms to reach a working section where anyone is scheduled to work during the oncoming shift.\n\n(7) Areas where trolley wires or trolley feeder wires are to be or will remain energized during the oncoming shift.\n\n(8) High spots along intake air courses where methane is likely to accumulate, if equipment will be operated in the area during the shift.\n\n(9) Underground electrical installations referred to in § 75.340(a), except those pumps listed in § 75.340 (b)(2) through (b)(6), and areas where compressors subject to § 75.344 are installed if the electrical installation or compressor is or will be energized during the shift.\n\n(10) Other areas where work or travel during the oncoming shift is scheduled prior to the beginning of the preshift examination.\n\n(11) Preshift examinations shall include examinations to identify violations of the standards listed below:\n\n(i) §§ 75.202(a) and 75.220(a)(1)—roof control;\n\n(ii) §§ 75.333(h) and 75.370(a)(1)—ventilation, methane;\n\n(iii) §§ 75.400 and 75.403—accumulations of combustible materials and application of rock dust;\n\n(iv) § 75.1403—other safeguards, limited to maintenance of travelways along belt conveyors, off track haulage roadways, and track haulage, track switches, and other components for haulage;\n\n(v) § 75.1722(a)—guarding moving machine parts; and\n\n(vi) § 75.1731(a)—maintenance of belt conveyor components.\n\n(c) The person conducting the preshift examination shall determine the volume of air entering each of the following areas if anyone is scheduled to work in the areas during the oncoming shift:\n\n(1) In the last open crosscut of each set of entries or rooms on each working section and areas where mechanized mining equipment is being installed or removed. The last open crosscut is the crosscut in the line of pillars containing the permanent stoppings that separate the intake air courses and the return air courses.\n\n(2) On each longwall or shortwall in the intake entry or entries at the intake end of the longwall or shortwall face immediately outby the face and the velocity of air at each end of the face at the locations specified in the approved ventilation plan.\n\n(3) At the intake end of any pillar line—\n\n(i) If a single split of air is used, in the intake entry furthest from the return air course, immediately outby the first open crosscut outby the line of pillars being mined; or\n\n(ii) If a split system is used, in the intake entries of each split immediately inby the split point.\n\n(d) The person conducting the preshift examination shall check the refuge alternative for damage, the integrity of the tamper-evident seal and the mechanisms required to deploy the refuge alternative, and the ready availability of compressed oxygen and air.\n\n(e) The district manager may require the operator to examine other areas of the mine or examine for other hazards and violations of other mandatory health or safety standards found during the preshift examination.\n\n(f) Certification. At each working place examined, the person doing the preshift examination shall certify by initials, date, and the time, that the examination was made. In areas required to be examined outby a working section, the certified person shall certify by initials, date, and the time at enough locations to show that the entire area has been examined.\n\n(g) Recordkeeping. A record of the results of each preshift examination, including a record of hazardous conditions and violations of the nine mandatory health or safety standards and their locations found by the examiner during each examination, and of the results and locations of air and methane measurements, shall be made on the surface before any persons, other than certified persons conducting examinations required by this subpart, enter any underground area of the mine. The results of methane tests shall be recorded as the percentage of methane measured by the examiner. The record shall be made by the certified person who made the examination or by a person designated by the operator. If the record is made by someone other than the examiner, the examiner shall verify the record by initials and date by or at the end of the shift for which the examination was made. A record shall also be made by a certified person of the action taken to correct hazardous conditions and violations of mandatory health or safety standards found during the preshift examination. All preshift and corrective action records shall be countersigned by the mine foreman or equivalent mine official by the end of the mine foreman's or equivalent mine official's next regularly scheduled working shift. The records required by this section shall be made 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(h) Retention period. Records shall be retained at a surface location at the mine for at least 1 year and shall be made available for inspection by authorized representatives of the Secretary and the representative of miners.\n\n[61 FR 9829, Mar. 11, 1996, as amended at 61 FR 55527, Oct. 25, 1996; 62 FR 35085, June 30, 1997; 64 FR 45170, Aug. 19, 1999; 73 FR 80697, Dec. 31, 2008; 77 FR 20714, Apr. 6, 2012]","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.403","heading":"Maintenance of incombustible content of rock dust.","id":"75.403","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.403","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"E","subpartHeading":"Subpart E—Combustible Materials and Rock Dusting","text":"Where rock dust is required to be applied, it shall be distributed upon the top, floor, and sides of all underground areas of a coal mine and maintained in such quantities that the incombustible content of the combined coal dust, rock dust, and other dust shall be not less than 80 percent. Where methane is present in any ventilating current, the percent of incombustible content of such combined dust shall be increased 0.4 percent for each 0.1 percent of methane.\n\n[75 FR 57857, Sept. 23, 2010; 76 FR 35978, June 21, 2011]","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.517","heading":"Power wires and cables; insulation and protection.","id":"75.517","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.517","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 Provisions]\n\nPower wires and cables, except trolley wires, trolley feeder wires, and bare signal wires, shall be insulated adequately and fully protected.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.1600-2","heading":"Communication facilities; working sections; installation and maintenance requirements; audible or visual alarms.","id":"75.1600-2","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-Q/section-75.1600-2","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"Q","subpartHeading":"Subpart Q—Communications","text":"(a) Telephones or equivalent two-way communication facilities provided at each working section shall be located not more than 500 feet outby the last open crosscut and not more than 800 feet from the farthest point of penetration of the working places on such section.\n\n(b) The incoming communication signal shall activate an audible alarm, distinguishable from the surrounding noise level, or a visual alarm that can be seen by a miner regularly employed on the working section.\n\n(c) If a communication system other than telephones is used and its operation depends entirely upon power from the mine electric system, means shall be provided to permit continued communication in the event the mine electric power fails or is cut off; provided, however, that where trolley phones and telephones are both used, an alternate source of power for the trolley phone system is not required.\n\n(d) Trolley phones connected to the trolley wire shall be grounded in accordance with Subpart H of this part.\n\n(e) Telephones or equivalent two-way communication facilities shall be maintained in good operating condition at all times. In the event of any failure in the system that results in loss of communication, repairs shall be started immediately, and the system restored to operating condition as soon as possible.\n\n[38 FR 29999, Oct. 31, 1973]","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.1910","heading":"Nonpermissible diesel-powered equipment; electrical system design and performance requirements.","id":"75.1910","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-T/section-75.1910","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"T","subpartHeading":"Subpart T—Diesel-Powered Equipment","text":"Electrical circuits and components associated with or connected to electrical systems on nonpermissible diesel-powered equipment utilizing storage batteries and integral charging systems, except for the special category of equipment under § 75.1908(d), must conform to the following requirements:\n\n(a) Overload and short circuit protection must be provided for electric circuits and components in accordance with §§ 75.518 and 75.518-1 of this part;\n\n(b) Each electric conductor from the battery to the starting motor must be protected against short circuit by fuses or other circuit-interrupting devices placed as near as practicable to the battery terminals;\n\n(c) Each branch circuit conductor connected to the main circuit between the battery and charging generator must be protected against short circuit by fuses or other automatic circuit-interrupting devices;\n\n(d) The electrical system shall be equipped with a circuit-interrupting device by means of which all power conductors can be deenergized. The device must be located as close as practicable to the battery terminals and be designed to operate within its electrical rating without damage. The device shall not automatically reset after being actuated. All magnetic circuit-interrupting devices must be mounted in a manner to preclude their closing by force of gravity;\n\n(e) Each motor and charging generator must be protected by an automatic overcurrent device. One protective device will be acceptable when two motors of the same rating operate simultaneously and perform virtually the same duty;\n\n(f) Each ungrounded conductor must have insulation compatible with the impressed voltage. Insulation materials must be resistant to deterioration from engine heat and oil. Electric conductors must meet the applicable requirements of §§ 75.513 and 75.513-1, except electric conductors for starting motors, which must only meet the requirements of § 75.513;\n\n(g) All wiring must have adequate mechanical protection to prevent damage to the cable that might result in short circuits;\n\n(h) Sharp edges and corners must be removed at all points where there is a possibility of damaging wires, cables, or conduits by cutting or abrasion. The insulation of the cables within a battery box must be protected against abrasion;\n\n(i) When insulated wires other than cables pass through metal frames, the holes must be substantially bushed with insulated bushings. Cables must enter metal frames of motors, splice boxes, and electric components only through proper fittings. All electrical connections and splices must be mechanically and electrically efficient, and suitable connectors shall be used. All electrical connectors or splices in insulated wire must be reinsulated at least to the same degree of protection as the remainder of the wire;\n\n(j) The battery must be secured to prevent movement, and must be protected from external damage by position. Batteries that are not protected from external damage by position must be enclosed in a battery box. Flame-resistant insulation treated to resist chemical reaction to electrolyte must be provided on battery connections to prevent battery terminals from contacting conducting surfaces;\n\n(k) A battery box, including the cover, must be constructed of steel with a minimum thickness of 1/8 inch, or of a material other than steel that provides equivalent strength;\n\n(l) Battery-box covers must be lined with a flame-resistant insulating material permanently attached to the underside of the cover, unless equivalent protection is provided. Battery-box covers must be provided with a means for securing them in closed position. At least 1/2 inch of air space must be provided between the underside of the cover and the top of the battery, including terminals;\n\n(m) Battery boxes must be provided with ventilation openings to prevent the accumulation of flammable or toxic gases or vapors within the battery box. The size and locations of openings for ventilation must prevent direct access to battery terminals;\n\n(n) The battery must be insulated from the battery-box walls and supported on insulating materials. Insulating materials that may be subject to chemical reaction with electrolyte must be treated to resist such action; and\n\n(o) Drainage holes must be provided in the bottom of each battery box.","occurrenceCount":3},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 75.1909","heading":"Nonpermissible diesel-powered equipment; design and performance requirements.","id":"75.1909","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-T/section-75.1909","part":"75","partHeading":"PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES","subchapter":"O","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","subpart":"T","subpartHeading":"Subpart T—Diesel-Powered Equipment","text":"(a) Nonpermissible diesel-powered equipment, except for the special category of equipment under § 75.1908(d), must be equipped with the following features:\n\n(1) An engine approved under subpart E of part 7 of this title equipped with an air filter sized in accordance with the engine manufacturer's recommendations, and an air filter service indicator set in accordance with the engine manufacturer's recommendations;\n\n(2) At least one portable multipurpose dry chemical type (ABC) fire extinguisher listed or approved by a nationally recognized independent testing laboratory with a 10A:60B:C or higher rating. The fire extinguisher must be located within easy reach of the equipment operator and protected from damage;\n\n(3) A fuel system specifically designed for diesel fuel meeting the following requirements:\n\n(i) A fuel tank and fuel lines that do not leak;\n\n(ii) A fuel tank that is substantially constructed and protected against damage by collision;\n\n(iii) A vent opening that maintains atmospheric pressure in the fuel tank, and that is designed to prevent fuel from splashing out of the vent opening;\n\n(iv) A self-closing filler cap on the fuel tank;\n\n(v) The fuel tank, filler and vent must be located so that leaks or spillage during refueling will not contact hot surfaces;\n\n(vi) Fuel line piping must be either steel-wire reinforced; synthetic elastomer-covered hose suitable for use with diesel fuel that has been tested and has been determined to be fire-resistant by the manufacturer; or metal;\n\n(vii) Fuel line piping must be clamped;\n\n(viii) Primary fuel lines must be located so that fuel line leaks do not contact hot surfaces;\n\n(ix) The fuel lines must be separated from electrical wiring and protected from damage in ordinary use;\n\n(x) A manual shutoff valve must be installed in the fuel system as close as practicable to the tank; and\n\n(xi) A water separator and fuel filter(s) must be provided.\n\n(4) A sensor to monitor the temperature and provide a visual warning of an overheated cylinder head on air-cooled engines;\n\n(5) Guarding to protect fuel, hydraulic, and electric lines when such lines pass near rotating parts or in the event of shaft failure;\n\n(6) Hydraulic tanks, fillers, vents, and lines located to prevent spillage or leaks from contacting hot surfaces;\n\n(7) Reflectors or warning lights mounted on the equipment which can be readily seen in all directions;\n\n(8) A means to direct exhaust gas away from the equipment operator, persons on board the machine, and combustible machine components;\n\n(9) A means to prevent unintentional free and uncontrolled descent of personnel-elevating work platforms; and\n\n(10) A means to prevent the spray from ruptured hydraulic or lubricating oil lines from being ignited by contact with engine exhaust system component surfaces.\n\n(b) Self-propelled nonpermissible diesel-powered equipment must have the following features in addition to those in paragraph (a):\n\n(1) A means to ensure that no stored hydraulic energy that will cause machine articulation is available after the engine is shut down;\n\n(2) A neutral start feature which ensures that engine cranking torque will not be transmitted through the powertrain and cause machine movement on vehicles utilizing fluid power transmissions;\n\n(3) For machines with steering wheels, brake pedals, and accelerator pedals, controls which are of automobile orientation;\n\n(4) An audible warning device conveniently located near the equipment operator;\n\n(5) Lights provided and maintained on both ends of the equipment. Equipment normally operated in both directions must be equipped with headlights for both directions;\n\n(6) Service brakes that act on each wheel of the vehicle and that are designed such that failure of any single component, except the brake actuation pedal or other similar actuation device, must not result in a complete loss of service braking capability;\n\n(7) Service brakes that safely bring the fully loaded vehicle to a complete stop on the maximum grade on which it is operated; and\n\n(8) No device that traps a column of fluid to hold the brake in the applied position shall be installed in any brake system, unless the trapped column of fluid is released when the equipment operator is no longer in contact with the brake activation device.\n\n(c) Self-propelled nonpermissible heavy-duty diesel-powered equipment under § 75.1908(a), except rail-mounted equipment, shall be provided with a supplemental braking system that:\n\n(1) Engages automatically within 5 seconds of the shutdown of the engine;\n\n(2) Safely brings the equipment when fully loaded to a complete stop on the maximum grade on which it is operated;\n\n(3) Holds the equipment stationary, despite any contraction of brake parts, exhaustion of any nonmechanical source of energy, or leakage;\n\n(4) Releases only by a manual control that does not operate any other equipment function;\n\n(5) Has a means in the equipment operator's compartment to apply the brakes manually without shutting down the engine, and a means to release and reengage the brakes without the engine operating; and\n\n(6) Has a means to ensure that the supplemental braking system is released before the equipment can be trammed, and is designed to ensure the brake is fully released at all times while the equipment is trammed.\n\n(d) Self-propelled nonpermissible light-duty diesel-powered equipment under § 75.1908(b), except rail-mounted equipment, must be provided with a parking brake that holds the fully loaded equipment stationary on the maximum grade on which it is operated despite any contraction of the brake parts, exhaustion of any nonmechanical source of energy, or leakage.\n\n(e) The supplemental and park brake systems required by paragraphs (c) and (d) must be applied when the equipment operator is not at the controls of the equipment, except during movement of disabled equipment.\n\n(f) Self-propelled personnel-elevating work platforms must be provided with a means to ensure that the parking braking system is released before the equipment can be trammed, and must be designed to ensure the brake is fully released at all times while the equipment is trammed.\n\n(g) Any nonpermissible equipment that discharges its exhaust directly into a return air course must be provided with a power package approved under subpart F of part 7 of this title.\n\n(h) Self-propelled nonpermissible heavy-duty diesel-powered equipment meeting the requirements of § 75.1908(a) must be provided with an automatic fire suppression system meeting the requirements of § 75.1911.\n\n(i) Self-propelled nonpermissible light-duty diesel-powered equipment meeting the requirements of § 75.1908(b) must be provided with an automatic or manual fire suppression system meeting the requirements of § 75.1911.\n\n(j) Nonpermissible equipment that is not self-propelled must have the following features in addition to those listed in paragraph (a):\n\n(1) A means to prevent inadvertent movement of the equipment when parked;\n\n(2) Safety chains or other suitable secondary connections on equipment that is being towed; and\n\n(3) An automatic fire suppression system meeting the requirements of § 75.1911.\n\n[61 FR 55527, Oct. 25, 1996; 62 FR 34641, June 27, 1997]","occurrenceCount":1}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"4407277","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}