{"data":{"schemaVersion":"realm.mine-profile.v1","generatedAt":"2026-10-13T11:26:59.401Z","identity":{"mine_id":"2400839","name":"Decker Mine","status":"Active","status_date":"1972-09-01","mine_type":"Surface","coal_metal":"C","commodity":"Coal (Bituminous)","state":"MT","county":"Big Horn","nearest_town":"Decker, MT 59025","operator_id":"P02385","operator_name":"Decker Coal Company","controller_id":"0117761","controller_name":"Lighthouse Resources Inc","district":"C09","office":"Gillette WY Field Office","employees":28,"latitude":45.037778,"longitude":-106.831111},"coverage":{"contributingSources":17,"registeredSources":20,"sourceRows":5236},"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 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The tip of the ring finger was cut off with only slight pinch damage to the pinky.","sourceDate":"2023-06-28"},{"SOURCE_ROW_NUMBER":"221296","DOCUMENT_NO":"220211650009","ACCIDENT_DT":"06/15/2021","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FIRE","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","NARRATIVE":"Grass fire was started when a 230,000 volt transmission line fell to the ground in the highway 314 right of way. The fire spread to mine property in the pond 24 pit 16 area of the mine. Local fire departments and mine personnel contained the fire. Fire was extinguished. No injuries or damage to property.","sourceDate":"2021-06-15"},{"SOURCE_ROW_NUMBER":"92156","DOCUMENT_NO":"220211650044","ACCIDENT_DT":"06/14/2021","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FIRE","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","NARRATIVE":"Grass fire along Highway 314 spread from highway right of way on to mine property in the B/C section of pit 11. Fire was contained with local fire departments and mine personnel and equipment. No injuries. Highway right of way fence posts burned. Unknown how fire started on the highway right of way.","sourceDate":"2021-06-14"},{"SOURCE_ROW_NUMBER":"87985","DOCUMENT_NO":"220202530008","ACCIDENT_DT":"09/05/2020","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"ELECTRICAL","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","NARRATIVE":"Due to high winds and extremely dry range conditions, a broken insulator and associated wind slap arc on the West Decker main feed 345Kv power line initiated an approximately 500 acre grass fire. 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Went to hospital where X-rays showed no breaks, but did result in nine stitches to ring finger.","sourceDate":"2019-12-18"},{"SOURCE_ROW_NUMBER":"148230","DOCUMENT_NO":"220192380049","ACCIDENT_DT":"08/25/2019","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"FIRE","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","NARRATIVE":"All evidence indicates that a bird got into a 34,500 kV overhead power line near the West Decker prill silos. The resulting incineration of the bird resulted in approximately 50 acres of native rangeland being burned. Other than 2 power poles being charred, no structures or equipment were near the fire.","sourceDate":"2019-08-25"},{"SOURCE_ROW_NUMBER":"242915","DOCUMENT_NO":"220182070010","ACCIDENT_DT":"07/25/2018","DEGREE_INJURY":"NO DYS AWY FRM WRK,NO RSTR ACT","CLASSIFICATION":"HANDLING OF MATERIALS","ACCIDENT_TYPE":"Struck by flying object","OCCUPATION":"Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"When the pin was backed out of a rear trailer strut, it swung free & struck the employee in the lower lip.","sourceDate":"2018-07-25"},{"SOURCE_ROW_NUMBER":"109227","DOCUMENT_NO":"220180790017","ACCIDENT_DT":"03/12/2018","DEGREE_INJURY":"NO DYS AWY FRM WRK,NO RSTR ACT","CLASSIFICATION":"HANDLING OF MATERIALS","ACCIDENT_TYPE":"Caught in, under or between a moving and a stationary object","OCCUPATION":"Greaser, Grease man, Oiler, Lube man, Dragline oiler","NO_INJURIES":"1","DAYS_LOST":"0","NARRATIVE":"Injured employee crushed left little finger between the flat bed pickup rail and replacement dragline bucket tooth that ee was loading into the truck bed.","sourceDate":"2018-03-12"},{"SOURCE_ROW_NUMBER":"79366","DOCUMENT_NO":"220173050023","ACCIDENT_DT":"10/23/2017","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"ELECTRICAL","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","NARRATIVE":"Driven by high winds, a power line disconnect switch located at pole #80 on the N side of pit 15 - arced igniting dry grass. 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The water truck & wild land fire truck were staged appropriately but the gusting winds carried hot embers from the fireball onto native grasses & the resulting fire spread very quickly.","sourceDate":"2017-08-08"},{"SOURCE_ROW_NUMBER":"212715","DOCUMENT_NO":"220163560006","ACCIDENT_DT":"08/20/2016","DEGREE_INJURY":"ACCIDENT ONLY","CLASSIFICATION":"POWERED HAULAGE","ACCIDENT_TYPE":"Accident type, without injuries","OCCUPATION":"NO VALUE FOUND","NO_INJURIES":"0","NARRATIVE":"While climbing aboard a Euclid CH-150, the employee stumbled to the ground when one of the rubber straps for the boarding steps broke.  Decker Coal is filing this form under protest, as no injury resulted from this incident. 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ines/2400839/safety","description":"Full-period 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Fire extinguishers shall be examined at least once every 6 months and the date of such examination shall be recorded on a permanent tag attached to the extinguisher.\n\n(Pub. L. No. 96-511, 94 Stat. 2812 (44 U.S.C. 3501 et seq.))\n\n[36 FR 9364, May 22, 1971, as amended at 60 FR 33723, June 29, 1995]","occurrenceCount":2},{"chapter":"I","heading":"Protective equipment; testing and storage.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-H/section-77.704-8","part":"77","subchapter":"O","subpart":"H","id":"77.704-8","citation":"30 CFR 77.704-8","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","partHeading":"PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","subpartHeading":"","text":null,"occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 47.41","heading":"Requirement for container labels.","id":"47.41","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41","part":"47","partHeading":"PART 47—HAZARD COMMUNICATION (HazCom)","subchapter":"H","subchapterHeading":"SUBCHAPTER H—EDUCATION AND TRAINING","subpart":"E","subpartHeading":"Subpart E—Container Labels and Other Forms of Warning","text":"(a) The operator must ensure that each container of a hazardous chemical has a label. If a container is tagged or marked with the appropriate information, it is labeled.\n\n(1) The operator must replace a container label immediately if it is missing or if the hazard information on the label is unreadable.\n\n(2) The operator must not remove or deface existing labels on containers of hazardous chemicals.\n\n(b) For each hazardous chemical produced at the mine, the operator must prepare a container label and update this label with any significant, new information about the chemical's hazards within 3 months of becoming aware of this information.\n\n(c) For each hazardous chemical brought to the mine, the operator must replace an outdated label when a revised label is received from the chemical's manufacturer or supplier. The operator is not responsible for an inaccurate label obtained from the chemical's manufacturer or supplier.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.1607","heading":"Loading and haulage equipment; operation.","id":"77.1607","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1607","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) Vehicles shall follow at a safe distance; passing shall be limited to areas of adequate clearance and visibility.\n\n(b) Mobile equipment operators shall have full control of the equipment while it is in motion.\n\n(c) Equipment operating speeds shall be prudent and consistent with conditions of roadway, grades, clearance, visibility, traffic, and the type of equipment used.\n\n(d) Cabs of mobile equipment shall be kept free of extraneous materials.\n\n(e) Operators shall sit facing the direction of travel while operating equipment with dual controls.\n\n(f) When an equipment operator is present, men shall notify him before getting on or off equipment.\n\n(g) Equipment operators shall be certain, by signal or other means, that all persons are clear before starting or moving equipment.\n\n(h) Where possible, aerial tramways shall not be started until the tramway operator has ascertained that everyone is in the clear.\n\n(i) Dust control measures shall be taken where dust significantly reduces visibility of equipment operators.\n\n(j) Dippers, buckets, loading booms, or heavy suspended loads shall not be swung over the cabs of haulage vehicles until the drivers are out of the cabs and in safe locations, unless the trucks are designed specifically to protect the drivers from falling material.\n\n(k) Men shall not work or pass under the buckets or booms of loaders in operation.\n\n(l) Tires shall be deflated before repairs on them are started and adequate means shall be provided to prevent wheel locking rims from creating a hazard during tire inflation.\n\n(m) Electrically powered mobile equipment shall not be left unattended unless the master switch is in the off position, all operating controls are in the neutral position, and the brakes are set or other equivalent precautions are taken against rolling.\n\n(n) Mobile equipment shall not be left unattended unless the brakes are set. The wheels shall be turned into a bank or berm, or shall be blocked, when such equipment is parked on a grade.\n\n(o) Lights, flares, or other warning devices shall be posted when parked equipment creates a hazard to vehicular traffic.\n\n(p) Dippers, buckets, scraper blades, and similar movable parts shall be secured or lowered to the ground when not in use.\n\n(q) Shovel trailing cables shall not be moved with the shovel dipper unless cable slings or sleds are used.\n\n(r) Equipment which is to be hauled shall be loaded and protected so as to prevent sliding or spillage.\n\n(s) When moving between work areas, the equipment shall be secured in the travel position.\n\n(t) Any load extending more than 4 feet beyond the rear of the vehicle body should be marked clearly with a red flag by day and a red light at night.\n\n(u) Tow bars shall be used to tow heavy equipment and a safety chain shall be used in conjunction with each tow bar.\n\n(v) Railroad cars shall be kept under control at all times by the car dropper. Cars shall be dropped at a safe rate and in a manner that will insure that the car dropper maintains a safe position while working and traveling around the cars.\n\n(w) Railroad cars shall not be coupled or uncoupled manually from the inside of curves unless the railroad and cars are so designed to eliminate any hazard from coupling or uncoupling cars from inside of curves.\n\n(x) Persons shall wear safety belts when dropping railroad cars.\n\n(y) Railcars shall not be left on sidetracks unless ample clearance is provided for traffic on adjacent tracks.\n\n(z) Parked railcars, unless held effectively by brakes, shall be blocked securely.\n\n(aa) Railroad cars and all trucks shall be trimmed properly when they have been loaded higher than the confines of their cargo space.\n\n(bb) When the entire length of a conveyor is visible from the starting switch, the operator shall visually check to make certain that all persons are in the clear before starting the conveyor. When the entire length of the conveyor is not visible from the starting switch, a positive audible or visible warning system shall be installed and operated to warn persons that the conveyor will be started.\n\n(cc) Unguarded conveyors with walkways shall be equipped with emergency stop devices or cords along their full length.\n\n(dd) Adequate backstops or brakes shall be installed on inclined-conveyor drive units to prevent conveyors from running in reverse if a hazard to personnel would be caused.\n\n(ee) Aerial tram conveyor buckets shall not be overloaded, and feed shall be regulated to prevent spillage.","occurrenceCount":1},{"chapter":"I","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","citation":"30 CFR 77.502","heading":"Electric equipment; examination, testing, and maintenance.","id":"77.502","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502","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":"F","subpartHeading":"Subpart F—Electrical Equipment—General","text":"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.","occurrenceCount":3},{"chapter":"I","heading":"Electric equipment; frequency of examination and testing.","officialUrl":"https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502-2","part":"77","subchapter":"O","subpart":"F","id":"77.502-2","citation":"30 CFR 77.502-2","chapterHeading":"CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","subchapterHeading":"SUBCHAPTER O—COAL MINE SAFETY AND HEALTH","partHeading":"PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES","subpartHeading":"","text":null,"occurrenceCount":2}],"fullCorpus":"/data/title30-sections.json"}}},"meta":{"representation":"json","mineId":"2400839","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804}}