299:, in which pressure causes material from the walls and ceiling to explode inward into the excavated spaces. No miners were injured and all equipment was recovered from the affected area, but the partial collapse closed off that area and forced the mine to instead extract coal that had a higher ash content. The company depended on the low-ash coal to meet its contractual obligations, however, so on March 21 a meeting was held in which it was decided to return to the south barrier pillar. This pillar was adjacent to the north barrier pillar. The March 10 event was never officially reported to
378:, which would be expected if the miners were still alive and breathing. Subsequent air samples, though, showed oxygen levels near 7%, at near fatal levels for human life. Initially, the subsequent sampling was thought to be consistent with a neighboring sealed-off mine cavity, and that the drill bit had simply drifted off course, but it was later confirmed that it actually did reach its targeted destination. Seemingly, the initial findings of 20.5% oxygen levels were from the bore hole itself, instead of the actual mine cavity.
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708:, the fourth bore hole was completed. Cameras showed the area was completely collapsed, and air samples taken would not support human life. Rob Moore told reporters, "It is disappointing. And it's likely that these miners may not be found." A fifth bore hole was started on August 20. Both the monitoring equipment and continued seismic activity indicated that the mine was slowly collapsing and remained unsafe for underground rescue workers.
729:, owner Bob Murray announced the closure of the Tower mine, which contains the area of the collapse. Murray announced that he would relocate workers to Illinois or Ohio if they choose, saying, "If they choose this, there will be no one laid off." Some workers complained that he was not offering enough benefits for relocated workers, and that a cost of living adjustment to local pay scales reduced their salary too much.
464:, owner of the mine, stated that he filed paperwork with federal regulators to permanently close and seal the Crandall Canyon mine. "Had I known that this evil mountain, this alive mountain, would do what it did, I would never have sent the miners in here. I'll never go near that mountain again," he said. Murray initially claimed the accident was due to an earthquake, stating he and his company held no responsibility.
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454:, the mine collapsed again when one of the walls of the tunnel exploded outwards, killing three rescue workers and injuring six others. All rescue workers were pulled from the mine, and it was not known whether rescue efforts underground for the trapped miners would continue. The three rescuers killed were Dale "Bird" Black (49), Brandon Kimber (29), and Gary Jensen (53). Jensen was an inspector for MSHA.
771:, a 53-page report issued by University of Utah seismologists was released to the public. It recalculated the epicenter of the magnitude-3.9 mine collapse began near where miners were excavating coal and quickly grew to a 50-acre (200,000 m) cave-in. They also estimated the size of the collapse to be about four times larger than was thought shortly after the time of the Aug. 6, 2007, disaster.
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feet (3,274 m). Mill Fork Peak, located about 1.2 miles (1.9 km) south of the mine's entrance, is at elevation 9,885 feet (3,013 m). A ridge line 0.5 miles (0.80 km) north of the mine entrance reaches elevations above 9,200 feet (2,800 m). That is an offset of about 1,400 vertical feet (427m) above the mine's entrance in the canyon below.
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target the noises detected in the mine about 3/4 of the distance to the third hole, roughly 800 feet (240 m) beyond the initial holes. The first two bore holes targeted the approximate location of the miners at the time of the collapse. The third bore hole targeted a ventilation area about 1,200 ft (370 m) beyond the first two holes.
238:. The Crandall Canyon mine is operated by Genwal Resources Inc., an operating division of UtahAmerican. The other co-owner is the Intermountain Power Agency (IPA) of South Jordan, Utah. On July 24, 2008, the U.S. government announced its highest penalty for coal mine safety violations against Genwal Resources, $ 1.64 million, for the 2007 collapse.
743:, the seventh bore hole was completed. The mine cavity was filled with mud and debris, rising about 5 ft (1.5 m) per hour (1.5 m/h). Mine owners announced that there were no plans to drill additional holes, which cost about $ 600,000 each. They also announced plans to send the robotic camera down the fourth bore hole.
722:, a sixth bore hole reached the mine tunnel. Officials announced that the section of the mine was too small for the miners to have survived. A robotic camera—which was ordered weeks before and was finally assembled over the previous week—was planned to descend the hole on August 27. A seventh bore hole was also planned.
328:. The mine collapsed, trapping six workers: Kerry Allred (58), Luis Hernandez (23), Brandon Phillips (24), Carlos Payan (22), Manuel Sanchez (41), and Don Erickson (50). The workers were believed to be approximately 3.4 miles (5.5 km) from the mine entrance and 1,500 feet (460 m) underground.
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The
Department of Labor criticized MSHA chief Richard Stickler for his handling of the rescue effort. His "obsession" for keeping a continuous log of the progress made or lost by tunneling rescuers was said to demand that the crews had to halt the rescue digging to report to him, in order to document
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The topography in the vicinity of the mine is generally mountainous with peaks reaching above 10,000 feet (3,000 m) within a 3-mile (4.8 km) radius from the mine's entrance. An unnamed peak 3-mile (4.8 km) west at the head of both
Crandall Canyon and Blind Canyon is at elevation 10,743
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On July 24, 2008, MSHA announced its highest penalty for coal mine safety violations, $ 1.85 million (~$ 2.57 million in 2023), for the collapse. The government fined Genwal
Resources, $ 1.34 million "for violations that directly contributed to the deaths of six miners last year," plus nearly $
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Thursday August 9, 2007, a drill bit boring a 2.5 inches (6.4 cm) hole over 1,800 feet (550 m) into the presumed location of the trapped miners reached its targeted destination. The hole was fitted with a steel pipe to allow air samples to be recovered and a microphone to be lowered, which
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On mid-day August 16, 2007, eleven days after the collapse, underground rescue teams were less than halfway through the rubble to the suspected location of the miners. Continued bursting of tunnel walls damaged digging equipment and required additional structural reinforcement for the safety of the
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MSHA said the mine was "destined to fail" because the mining company made critical miscalculations and didn't report early warning signs. MSHA itself was faulted by the
Department of Labor, of which MSHA is an agency, for lax oversight before the collapse and mismanaging the failed rescue attempt.
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Robert Murray was also heavily criticized for his actions during the rescue attempt. The MSHA cited his volatile behavior, especially at daily briefings for family members. MSHA reported that he "frequently became very irate and would start yelling," even making young children cry. He told family
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According to 1,400 pages of government and congressional reports, the mine was doomed, starting months before the disaster. MSHA cited Murray Energy affiliate Genwal
Resources Inc. for negligence. Engineers Agapito Associates Inc. of Grand Junction, Colo., was cited for "reckless disregard." The
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lowered into the borehole, had a duration of around five minutes, but could easily have been an animal or even a rock crumbling, said
Stickler. This sound activity caused a major rethinking in the proposed location of the fourth hole that was under consideration. The fourth hole was redirected to
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Genwal
Resources was reported to use overly aggressive mining, and failed to recalibrate their modeling of Crandall's supposed stability to match the reduction of crucial barrier pillars. In one case it miscalculated depth covers that are fundamental to safety equations at underground mines. In
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to scope the site. It reached the mine shaft early
Saturday, August 11. The aforementioned robotic camera was lowered into the collapsed coal mine from the nine-inch (229 mm) wide shaft, and revealed typical mining equipment but not the six missing miners, according to a federal official
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On August 23, 2007, rescue workers bored a sixth hole into the area where the miners were last known to be working. No signs of life were detected from the sixth borehole. "There was zero void. are going through a living hell, and it's just heartbreaking" quoted Colin King of Rob Moore, vice
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A third bore hole was started on the evening of Sunday, August 12. The target was a ventilation area near the back of the mine. Miners are trained to go to these areas in the event that other escape routes are inaccessible. The bore hole was completed mid-day on
Wednesday, August 15. Initial
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Rescue teams were dispatched immediately to assess the damage to the mine and begin clearing rubble to reach the cavity. The process of clearing the rubble and reinforcing the passageways to the cavity was estimated to last between two and six weeks, but additional seismic activity and safety
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was installed the same year into the mine. The installation of the longwall nearly doubled the capacity of the mine. A new longwall was purchased two years later which increased the capacity further to 3.5 million tons (3,175,000 t) per year. To handle the increased capacity, a new loadout
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In 2006, the mine was cited for several safety violations, including lacking the required number of escape routes. Murray said that the safety violations were trivial and included violations such as not having enough toilet paper in the restroom. In addition, a practice referred to as
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reached the cavity location underground early Friday morning on August 10. The microphone recorded no sounds of human activity, but the crude air sample analysis from underground initially determined that the atmosphere was hospitable for life, with a sampling consisting of 20.5%
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facility was built at the mine. Additional federal leases were expected to extend the life of the mine and new portals on its south side were slated to be installed to expand access options. Mine owners had informed the state of Utah they planned to close the mine in 2008.
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president of Murray Energy, as he informed the families
Saturday. Although the sixth hole had been called the final hole, a seventh hole was drilled on August 30, 2007. The mine cavity was filled with mud and debris, rising about 5 ft (1.5 m) per hour (1.5 m/h).
750:, the robotic camera was sent down the fourth bore hole. Federal Mine Safety and Health Administration spokesman Rich Kulczewski said officials planned to drop the robot down the fourth hole despite his guess of a 90 percent chance the high-tech camera could be lost.
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stations in Utah and Nevada. Initial reports questioned whether the collapse was triggered by an earthquake, but subsequent research proved the seismic readings were due to the collapse. Additional seismic activities were recorded in the days following the event.
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A concurrent rescue effort involved the creation of a nine-inch (22 cm) hole. The target was another possible location of the miners at the time of the collapse. This shaft would have allowed the delivery of food, water, and a powerful teleoperated robotic
481:, the government's top mine safety official said "It was not — and I repeat, it was not — a natural occurring earthquake." The government also levied a $ 220,000 fine against a mining consultant, Agapito Associates, "for faulty analysis of the mine's design."
764:, Federal regulators revealed that Murray Energy sealed three main passageways with concrete blocks in October, leaving the bodies inside entombed. The blocks may be removed at a later date in the unlikely event there are any subsequent recovery efforts.
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A week later, Blake Hannah, a retired inspector who used to oversee the mine said that several warning signs — including reports from miners of weakening support structures — had been ignored. "In my opinion," he said, "there were bad mining practices."
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created by Karen Jobe Templeton called "Heroes Among Us." It was unveiled on September 18, 2008, and features deep relief portraits of each of the nine men killed, and rises six feet off the ground, "so that the viewer looks each miner in the eye."
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method. The extraction of material literally creates a 'room' while the ceiling is supported by the 'pillars' of coal that remain. Retreat mining refers to the common practice of removing the pillars while retreating back towards the mine entrance.
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surrounds the mine. The mine conducts surface operations on 10 acres (40,000 m) of disturbed land within the forest. The permit area for the mine covers an area of more than 5,000 acres (20 km) utilizing fee land, federal, and state leases.
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crew. In the 24 hours between the August 15th and 16th reports, digging teams were only able to advance about 25 feet (7.6 m). They had advanced 826 feet (252 m) into the rubble and estimated 1,200 feet (370 m) still remained.
127:
The mine made headline news when six miners were trapped by a collapse in August 2007. Ten days later, three rescue workers were killed by a subsequent collapse. The six miners were later declared dead and their bodies were never recovered.
266:) of coal each year. NEICO purchased the mine in 1989 and the next year IPA purchased 50% interest. By 1991, a continuous haulage system was used helping production surge to 1 to 1.5 million tons (900,000–1,400,000 t) each year.
757:, Federal officials called off the search after four weeks of failed search efforts. The option of drilling an eighth hole was not ruled out entirely but would only be considered if new information arose to justify its drilling.
715:, a fifth bore hole reached the mine tunnel. Video that came back from a camera lowered into the bore hole showed only about 6 inches of open space between the ceiling and rubble filling the 8-foot (2.4 m)-high tunnel.
736:, the robotic camera was unable to reach the mine through the sixth bore hole. The continuing seismic activity caused the bore hole to shift. The machine was able to descend within about 10 feet (3.0 m) of the mine cavity.
516:". A seismic event was registered at 6:38 in that area. in which several rescuers were injured, according to a representative from the Utah Department of Natural Resources. Two helicopters were also dispatched from
398:
Poor lighting allowed the camera only to see about 15 feet (4.6 m) into a void at the bottom of the drill hole, far less than the 100 feet (30 m) it is normally capable of seeing, said
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announced that there would be an indefinite suspension of the underground rescue effort, stemming from the three fatalities and nine injuries from the most recent collapse of the mine.
303:, as required by law. Robert Murray claimed to be unaware of the incident but minutes of the March 21 meeting, released in January 2008, revealed that he had in fact known about it.
1200:
796:, when pillars started unexpectedly collapsing in March 2007. MSHA said recklessness by Agapito Associates "directly contributed to the death of nine people."
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816:
A trail near the entrance of the mine now leads to a paved area which serves as an on-site memorial for the nine men killed in the 2007 disaster.
1918:
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524:. Deseret Morning News further reported that the same official, Tammy Kikuchi, stated that five people were injured, two critically.
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method. The Genwal Coal Company resumed mining there in 1983. At that time the mine produced between 100,000 and 230,000
186:. The mine is located in Crandall Canyon about 1.25 miles (2.01 km) west of its junction with the main highway road,
1774:"Collapsed Utah mine where 6 workers' bodies remain has been sealed" - Associated Press via International Herald Tribune
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1859:. Contains vector-image maps of the affected area of the mine and drill hole map, and also the emergency response plan.
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the U.S. government announced its highest penalty for coal mine safety violations, $ 1.85 million, for the collapse.
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Graves for the 6 miners buried in the collapse and memorials for the 3 rescue workers killed during rescue efforts
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another, a panel of experts determined, the firm overstated the strength of support pillars by a factor of two.
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on August 15, 2007, vibrations were reported to have been detected within the mine. These vibrations, heard by
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reported that at least six ambulances were dispatched to the mine following a "significant seismic event" or "
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headstones for the six miners killed were created by American Monument to serve as markers. Granite
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mine failed to notify MSHA of the early danger signs, instead alerting the more industry-friendly
1518:
1494:"AP Interview: Utah mine boss defends search for miners; 5th bore hole breaks through into mine"
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174:, in the Wasatch plateau coal field. The mine is located about 140 miles (230 km) south of
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167:(39.460000°, -111.167639°) with its entrance at an elevation of 7,835 feet (2,388 m).
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1101:"Crandall Canyon bombshell: Months before deadly cave-ins, owners knew of structural woes"
8:
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Another memorial to the August 2007 collapses can be found in Huntington, Utah. It is a
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was being conducted in some portions of the mine in which the coal had been removed by
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1482:
Fact sheet on Crandall Canyon Mine, mining-technology.com. Retrieved on April 8, 2010.
1147:"Seismic Moment Tensor Report for the 06 Aug 2007, M3.9 Seismic event in central Utah"
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1075:"Critics blast feds' approval of controversial 'retreat' mining at Crandall Canyon"
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1453:"Still no day in court for worker safety violations at Crandall Canyon coal mine"
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pm (KSTU also reported a 1.6 magnitude seismic shock occurring) (recorded by the
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FOY, PAUL; Burke, Garance; Vergakis, Brock; Borenstein, Seth (August 7, 2007).
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Mining was conducted at the site from November 1939 to September 1955 using a
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Seismological Report on the 6 Aug 2007 Crandall Canyon Mine Collapse in Utah
1196:"Utah mine owner: Efforts to reach the miners will take at least three days"
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members that "the media is telling you lies" and "the union is your enemy."
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reported that one injured rescue worker had been released from the hospital.
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Utah Geological Survey 2005 Coal Report (Crandall Mine described on pp 7-8)
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FoxNews.com Drill Reaches Level of Trapped Utah Miners; No Sound Heard
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There was another press conference discussing the latest developments.
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Robot-Assisted Rescuers Seek Answers in Wake of Utah Mine Collapse"
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confirmed reports of one fatality among the rescuers following a "
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Newswise: Fatal Mine Collapse Covered 50 Acres, Began Near Miners
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Fifth Hole to be Drilled, Officials Dash Hopes of Finding Miners
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Mine Disaster CSI: Earthquakes Shed New Light on Utah Collapse
1610:"Ambulances rush to Utah mine after another possible collapse"
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News report image of approximate bore hole targets — KSL News
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were also created for the three rescuers killed and serve as
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equipment was unable to fit through a bend in the bore hole.
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Genwal Resources, Inc. acquired the mine in March 1995 and a
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1519:"Senate panel issues subpoena for Utah mine owner - CNN.com"
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Second collapse and suspension of underground rescue efforts
295:
On March 10, 2007, the north barrier pillar suffered from a
1561:" New bore hole drilled at Utah mine finds no sign of life"
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were reporting nine injured and with two of those critical.
214:(formerly Andalex Resources), a company with approximately
61:
1277:"Drill hole may have missed miners, federal officials say"
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1048:"Murray's Illinois mine has 2,787 violations since 2005"
374:. The analysis did not, however, reveal the presence of
1347:"Rescuers say noises heard in mine, drilling increases"
1238:"Seismic Activities 'Totally Shut Down' Rescue Efforts"
336:" (collapse) were reported as magnitude 3.9 to 4.0 by
1666:
V.P. of Mine Company: Missing Miners May Not be Found
1427:"Rescue Halted at Mine After 3 Deaths and 6 Injuries"
1122:"Panoramio - Photo of Crandall Canyon Mine Distaster"
182:, and about 15 miles (24 km) west north-west of
1844:. Karen Jobe Templeton. Retrieved on August 5, 2012.
1543:"Crews prepare for final rescue effort at Utah mine"
1442:. Karen Job Templeton. Retrieved on August 5, 2012.
1182:"Six miners trapped after Utah coal mine collapses"
1889:Song written for the community of the lost miners.
1624:"Ambulances and helicopters rush to Crandall mine"
1832:. American Monument. Retrieved on August 5, 2012.
1092:
673:confirmed the three previously speculated deaths.
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1722:Crews With Robotic Camera Await 7th Hole at Mine
1694:Robotic Camera Will Probe Mine; 7th Hole Planned
1319:"Second drill reaches collapsed Utah mine shaft"
16:Bituminous coal mine in Emery County, Utah, U.S.
1763:"Search Ends For Buried Utah Miners" - CNN News
1750:Crews Send Robotic Camera Down 4th Hole at Mine
971:
969:
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218:65.1 million in annual sales, headquartered in
1291:"Second Drill Bit Heads Toward Trapped Miners"
606:reported that a second rescue worker had died.
1805:Year after mine collapse, many failures clear
1333:"Third Drill Hole Could Be Completed Tonight"
1161:"6 miners trapped in Utah coal mine collapse"
977:"Feds blame mine operator for fatal collapse"
624:reported that a third rescue worker had died.
320:took place on Monday, August 6, 2007, at 2:48
1800:
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1638:"Options dwindle in Utah mine rescue effort"
1582:7th Hole Shows Mine Shaft Filled with Debris
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1405:
1403:
998:"Crandall Canyon Mine Could Be Played Out"
931:http://ogm.utah.gov/coal/mines/C015032.htm
921:
919:
875:"US Gazetteer files: 2010, 2000, and 1990"
205:
80:
1789:
1466:"Hope turns to anger in Utah mining town"
1361:"Mysterious Noises Offer Hope for Miners"
1253:"Drill Reaches Miners' Presumed Location"
1149:@ U.C. Berkeley Seismological Laboratory
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1857:Crandall Canyon Mine - MSHA.gov MiniSite
1652:New Hole Shows No Sign of Trapped Miners
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428:
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190:, which runs through Huntington Canyon.
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1412:"3 Rescue Workers Killed at Utah Mine."
1400:
471:
446:Later on August 16, 2007, at about 6:30
250:Coal conveyors after the mine's closure
136:The Crandall Canyon Mine is located at
1919:Underground mines in the United States
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1217:Mine Collapse Not Caused By Earthquake
1098:
1072:
1024:"Utah Mine Rescue Effort Grinds Ahead"
896:
1041:
404:Mine Safety and Health Administration
395:speaking on Sunday, August 12, 2007.
178:, 34 miles (55 km) southeast of
1813:, Aug. 6, 2008, Retrieved 2008-08-06
1708:Murray Shuts Down Carbon County Mine
1429:The New York Times. August 17, 2007.
1394:Miners to Begin Drilling Fourth Hole
350:concerns introduced further delays.
344:
1929:2007 disasters in the United States
1884:Find A Grave: Crandall Canyon Mine.
311:
306:
13:
1073:GEHRKE, ROBERT (August 14, 2007).
996:CARLISLE, NATE (August 11, 2007).
929:. Retrieved August 10, 2007, from
867:
277:
86:Crandall Canyon Mine Entrance Sign
14:
1950:
1850:
1425:Frosch, Dan. and Lee Jennifer 8.
699:United States Department of Labor
1596:"University of Utah Seismograph"
1909:Coal mines in the United States
1904:Geography of Emery County, Utah
1842:"Crandall Canyon Mine Memorial"
1835:
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1736:Power Plant Scrambling for Coal
1728:
1714:
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1672:
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1588:
1568:. Retrieved on August 25, 2007.
1553:
1550:. Retrieved on August 23, 2007.
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1511:
1486:
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1472:. Retrieved on August 23, 2007.
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1445:
1440:"Crandall Canyon Mine Memorial"
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925:State of Utah (2007, July 31).
1455:. Retrieved on August 5, 2012.
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1015:
989:
953:
942:
477:300,000 for other violations.
385:A memorial located at the mine
1:
1914:Coal mining disasters in Utah
1508:. Retrieved on April 8, 2010.
1099:Gehrke, Robert (2008-01-17).
1062:Retrieved on August 10, 2007.
861:
881:. 2011-02-12. Archived from
811:
195:Manti-La Sal National Forest
7:
1414:Associated Press. 08.17.07.
879:United States Census Bureau
839:
484:
10:
1955:
241:
794:Bureau of Land Management
492:Thursday, August 16, 2007
232:Murray Energy Corporation
212:UtahAmerican Energy, Inc.
117:
109:
104:
96:
91:
79:
1464:Stagg, Jennifer (2007).
1307:— ScientificAmerican.com
1198:@ from AP at Yahoo! News
949:UtahAmerican @ Manta.com
856:List of mining disasters
697:, Rich Kuczewski of the
210:The mine is co-owned by
37:39.460000°N 111.167639°W
631:Friday, August 17, 2007
206:Ownership and operation
170:The mine is located in
155:39.46000°N 111.167639°W
1823:"Crandall Canyon Mine"
1626:— Deseret Morning News
1168:March 9, 2008, at the
960:UtahAmerican @ Hoovers
783:Government conclusions
434:
386:
251:
236:Robert E. "Bob" Murray
132:Location and geography
42:39.460000; -111.167639
1924:2007 mining disasters
1079:The Salt Lake Tribune
1060:The Salt Lake Tribune
1002:The Salt Lake Tribune
804:hourly measurements.
432:
384:
249:
160:39.46000; -111.167639
57:, was an underground
1451:Monforton, Celeste.
1321:— ABC News Australia
1203:August 12, 2007, at
927:Crandall Canyon Mine
472:U.S. Government fine
222:. UtahAmerican is a
75:Crandall Canyon Mine
51:Crandall Canyon Mine
1103:. Salt Lake Tribune
580:also at around 6:30
479:Richard E. Stickler
413:Shortly before 7:00
370:, and no traces of
151: /
76:
33: /
1828:2012-06-30 at the
1640:— Associated Press
1379:2007-08-19 at the
1224:2007-09-26 at the
1081:. Media News Group
1053:2007-10-11 at the
1030:. Associated Press
1004:. Media News Group
936:2008-01-31 at the
578:University of Utah
518:University of Utah
435:
387:
252:
172:Emery County, Utah
74:
69:Emery County, Utah
762:November 21, 2007
755:September 1, 2007
345:Disaster response
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1810:Associated Press
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572:" at about 6:30
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368:carbon monoxide
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278:Safety concerns
256:room and pillar
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1526:. Retrieved
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1396:" — KSL News
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1126:the original
1116:
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1094:
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1078:
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887:. Retrieved
883:the original
869:
846:Wilberg Mine
830:
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769:June 1, 2008
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1523:www.cnn.com
1410:Foy, Paul.
338:seismograph
234:, owned by
220:Sandy, Utah
158: /
55:Genwal Mine
53:, formerly
40: /
28:111°10′04″W
1898:Categories
1752:— KSL News
1738:— KSL News
1724:— KSL News
1710:— KSL News
1696:— KSL News
1682:— KSL News
1668:— KSL News
1654:- KSL News
1584:— KSL News
1528:2017-06-23
1363:— ABC News
1293:— ABC News
1251:ABC News:
1219:@ KUTV.com
1132:2017-10-29
1107:2008-01-18
1085:2007-08-26
1034:2007-08-07
1008:2007-08-24
889:2011-04-23
862:References
462:Bob Murray
332:from the "
297:rock burst
224:subsidiary
184:Huntington
143:39°27′36″N
92:Production
59:bituminous
25:39°27′36″N
1349:— CNN.com
1335:— KSL.com
1279:— CNN.com
1240:@ KSL.com
1163:@ CNN.com
851:Sago Mine
826:cenotaphs
812:Memorials
423:geophones
1826:Archived
1498:Archived
1470:BBC News
1377:Archived
1222:Archived
1201:Archived
1166:Archived
1051:Archived
934:Archived
840:See also
485:Timeline
406:(MSHA).
271:longwall
180:Fairview
97:Products
1875:, from
818:Granite
372:methane
366:, some
353:At 9:47
242:History
105:History
1598:— UofU
1028:Forbes
680:
669:&
658:
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546:) and
531:
501:
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392:camera
364:oxygen
355:
322:
230:based
118:Closed
110:Opened
1612:— CNN
678:11:00
667:MSNBC
611:11:40
589:10:57
544:MSNBC
542:(via
324:a.m.
1506:WSVN
656:4:56
638:1:50
584:pm).
570:bump
566:KSTU
555:9:57
529:9:22
514:bump
499:8:55
301:MSHA
260:tons
216:US$
193:The
121:2007
113:1939
65:mine
62:coal
49:The
1566:CNN
1548:CNN
982:CNN
774:On
767:On
760:On
753:On
746:On
739:On
732:On
725:On
718:On
711:On
704:On
693:On
684:MDT
682:am
676:At
671:CNN
662:MDT
660:am
654:At
649:CNN
644:MDT
642:am
636:At
629:On
622:CNN
617:MDT
615:pm
609:At
600:CNN
595:MDT
593:pm
587:At
561:MDT
559:pm
553:At
535:MDT
533:pm
527:At
510:CNN
505:MDT
503:pm
497:At
490:On
452:MDT
450:pm
419:MDT
417:pm
359:MDT
357:pm
326:MDT
226:of
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540:AP
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264:t
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