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The Crandall Canyon Mine, formerly Genwal Mine, was an underground
bituminous Asphalt, also known as bitumen (, ), is a sticky, black, highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product, and is classed as a pitch. Before the 20th century, the term ...
coal Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when ...
mine in northwestern
Emery County, Utah Emery County is a county in east-central Utah, United States. As of the 2010 United States Census, the population was 10,976. Its county seat is Castle Dale, and the largest city is Huntington. History Prehistory Occupation of the San Ra ...
. 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.


Location and geography

The Crandall Canyon Mine is located at (39.460000°, -111.167639°) with its entrance at an elevation of 7,835 feet (2,388m). The mine is located in
Emery County, Utah Emery County is a county in east-central Utah, United States. As of the 2010 United States Census, the population was 10,976. Its county seat is Castle Dale, and the largest city is Huntington. History Prehistory Occupation of the San Ra ...
, in the Wasatch plateau coal field. The mine is located about 140 miles (225 km) south of
Salt Lake City Salt Lake City (often shortened to Salt Lake and abbreviated as SLC) is the capital and most populous city of Utah, United States. It is the seat of Salt Lake County, the most populous county in Utah. With a population of 200,133 in 2020, th ...
, 34 miles (55 km) southeast of Fairview, and about 15 miles (24 km) west north-west of Huntington. The mine is located in Crandall Canyon about 1.25 miles (2 km) west of its junction with the main highway road, State Route 31, which runs through Huntington Canyon. The Manti-La Sal National Forest surrounds the mine. The mine conducts surface operations on 10 acres (40,000 m²) of disturbed land within the forest. The permit area for the mine covers an area of more than utilizing fee land, federal, and state leases. The topography in the vicinity of the mine is generally mountainous with peaks reaching above 10,000 feet (3050m) within a 3-mile (5 km) radius from the mine's entrance. An unnamed peak west at the head of both Crandall Canyon and Blind Canyon is at elevation 10,743 feet (3274m). Mill Fork Peak, located about 1.2 miles (2 km) south of the mine's entrance, is at elevation 9885 feet (3012m). A ridge line 0.5 miles (0.8 km) north of the mine entrance reaches elevations above 9200 feet (2800m). That is an offset of about 1,400 vertical feet (427m) above the mine's entrance in the canyon below.


Ownership and operation

The mine is co-owned by UtahAmerican Energy, Inc. (formerly Andalex Resources), a company with approximately US$65.1 million in annual sales, headquartered in
Sandy, Utah Sandy is a city in the Salt Lake City metropolitan area, located in Salt Lake County, Utah, United States. The population of Sandy was 87,461 at the 2010 census, making it the sixth-largest city in Utah. The population is currently estimat ...
. UtahAmerican is a
subsidiary A subsidiary, subsidiary company or daughter company is a company owned or controlled by another company, which is called the parent company or holding company. Two or more subsidiaries that either belong to the same parent company or having a ...
of
Cleveland, Ohio Cleveland ( ), officially the City of Cleveland, is a city in the U.S. state of Ohio and the county seat of Cuyahoga County. Located in the northeastern part of the state, it is situated along the southern shore of Lake Erie, across the U.S ...
based Murray Energy Corporation, owned by Robert E. "Bob" Murray. 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.


History

Mining was conducted at the site from November 1939 to September 1955 using a room and pillar method.State of Utah (2007, July 31). ''Crandall Canyon Mine''. Retrieved August 10, 2007, from http://ogm.utah.gov/coal/mines/C015032.htm The Genwal Coal Company resumed mining there in 1983. At that time the mine produced between 100,000 and 230,000
ton Ton is the name of any one of several units of measure. It has a long history and has acquired several meanings and uses. Mainly it describes units of weight. Confusion can arise because ''ton'' can mean * the long ton, which is 2,240 pounds ...
s (91,000–209,000 t) 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. Genwal Resources, Inc. acquired the mine in March 1995 and a longwall 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 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.


Safety concerns

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."Murray's Illinois mine has 2,787 violations since 2005"
. ''
The Salt Lake Tribune ''The Salt Lake Tribune'' is a newspaper published in the city of Salt Lake City, Utah. The ''Tribune'' is owned by The Salt Lake Tribune, Inc., a non-profit corporation. The newspaper's motto is "Utah's Independent Voice Since 1871." History ...
Retrieved on August 10, 2007.
In addition, a practice referred to as retreat mining was being conducted in some portions of the mine in which the coal had been removed by room and pillar 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. On March 10, 2007 the north barrier pillar suffered from a rock burst, 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 MSHA, 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.


Mining accidents


Initial collapse

A
mining accident A mining accident is an accident that occurs during the process of mining minerals or metals. Thousands of miners die from mining accidents each year, especially from underground coal mining, although accidents also occur in hard rock mining. ...
took place on Monday, August 6, 2007, at 2:48a.m. MDT. 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 1500 feet (457 m) underground. Seismic waves from the "
coal mine bump A coal mine bump (a bump, a mine bump, a mountain bump, or a rock burst) is a seismic jolt occurring within an underground mine due to the explosive collapse of one or more support pillars. In room and pillar mining, tunnels are advanced in a recta ...
" (collapse) were reported as magnitude 3.9 to 4.0 by
seismograph A seismometer is an instrument that responds to ground noises and shaking such as caused by earthquakes, volcanic eruptions, and explosions. They are usually combined with a timing device and a recording device to form a seismograph. The outpu ...
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.


Disaster response

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 concerns introduced further delays. At 9:47pm MDT Thursday August 9, 2007, a drill bit boring a 2.5 inch (6.3 cm) hole over 1,800 feet (549 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 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%
oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements ...
, some
carbon monoxide Carbon monoxide ( chemical formula CO) is a colorless, poisonous, odorless, tasteless, flammable gas that is slightly less dense than air. Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond. It is the simpl ...
, and no traces of
methane Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The relative abundance of methane ...
. The analysis did not, however, reveal the presence of
carbon dioxide Carbon dioxide ( chemical formula ) is a chemical compound made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature. In the air, carbon dioxide is t ...
, 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. 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
camera A camera is an optical instrument that can capture an image. Most cameras can capture 2D images, with some more advanced models being able to capture 3D images. At a basic level, most cameras consist of sealed boxes (the camera body), with ...
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 speaking on Sunday, August 12, 2007. 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 (30.5 m) it is normally capable of seeing, said Richard Stickler, Chief of the
Mine Safety and Health Administration The Mine Safety and Health Administration (MSHA) () is a large agency of the United States Department of Labor which administers the provisions of the Federal Mine Safety and Health Act of 1977 (Mine Act) to enforce compliance with mandatory safe ...
(MSHA). 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 equipment was unable to fit through a bend in the bore hole. Shortly before 7:00pm MDT on August 15, 2007, vibrations were reported to have been detected within the mine. These vibrations, heard by geophones 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 target the noises detected in the mine about 3/4 of the distance to the third hole, roughly 800 feet (250 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 1200 ft (365 m) beyond the first two holes. 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 crew. In the 24 hours between the August 15th and 16th reports, digging teams were only able to advance about 25 feet (7.5 m). They had advanced 826 feet (251.7 m) into the rubble and estimated 1200 feet (365 m) still remained.


Second collapse and suspension of underground rescue efforts

Later on August 16, 2007 at about 6:30pm MDT, the mine collapsed again when one of the walls of the tunnel exploded outwards, killing three rescue workers and injuring six others.Foy, Paul. ''"3 Rescue Workers Killed at Utah Mine."'' Associated Press. 08.17.07.
/ref> 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. 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." Bob Murray, 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. 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. nd theyare going through a living hell, and it's just heartbreaking" quoted Colin King of Rob Moore, vice 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 per hour (1.5 m/h). ''7th Hole Shows Mine Shaft Filled with Debris'' — KSL News
/ref>


U.S. Government fine

On July 24, 2008 MSHA announced its highest penalty for coal mine safety violations, $1.85 million, 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 $300,000 for other violations. Richard E. Stickler, 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."


Timeline

* On Thursday, August 16, 2007: ** At 8:55pm MDT: CNN reported that at least six ambulances were dispatched to the mine following a "significant seismic event" or " bump". 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
University of Utah The University of Utah (U of U, UofU, or simply The U) is a public research university in Salt Lake City, Utah. It is the flagship institution of the Utah System of Higher Education. The university was established in 1850 as the University of De ...
Hospital in
Salt Lake City Salt Lake City (often shortened to Salt Lake and abbreviated as SLC) is the capital and most populous city of Utah, United States. It is the seat of Salt Lake County, the most populous county in Utah. With a population of 200,133 in 2020, th ...
. Deseret Morning News further reported that the same official, Tammy Kikuchi, stated that five people were injured, two critically. ** At 9:22pm MDT: AP (via
MSNBC MSNBC (originally the Microsoft National Broadcasting Company) is an American news-based pay television cable channel. It is owned by NBCUniversala subsidiary of Comcast. Headquartered in New York City, it provides news coverage and political ...
) and KSL Newsradio were reporting nine injured and with two of those critical. ** At 9:57pm MDT: KSTU confirmed reports of one fatality among the rescuers following a " bump" at about 6:30pm (KSTU also reported a 1.6 magnitude seismic shock occurring) (recorded by the
University of Utah The University of Utah (U of U, UofU, or simply The U) is a public research university in Salt Lake City, Utah. It is the flagship institution of the Utah System of Higher Education. The university was established in 1850 as the University of De ...
also at around 6:30pm). ** At 10:57pm MDT: CNN & AP reported that a second rescue worker had died. ** At 11:40pm MDT: CNN reported that a third rescue worker had died. * On Friday, August 17, 2007: ** At 1:50am MDT: CNN reported that one injured rescue worker had been released from the hospital. ** At 4:56am MDT:
MSNBC MSNBC (originally the Microsoft National Broadcasting Company) is an American news-based pay television cable channel. It is owned by NBCUniversala subsidiary of Comcast. Headquartered in New York City, it provides news coverage and political ...
& CNN confirmed the three previously speculated deaths. ** At 11:00am MDT: There was another press conference discussing the latest developments. * On August 17, 2007, Rich Kuczewski of the
United States Department of Labor The United States Department of Labor (DOL) is one of the executive departments of the U.S. federal government. It is responsible for the administration of federal laws governing occupational safety and health, wage and hour standards, unemploy ...
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. * On August 18, 2007, 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. * On August 22, 2007, 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 -high tunnel. * On August 25, 2007, 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. * On August 26, 2007, 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. * On August 28, 2007, 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 m) of the mine cavity. * On August 30, 2007, the seventh bore hole was completed. The mine cavity was filled with mud and debris, rising about 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. * On August 31, 2007, 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. * On September 1, 2007, 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. * On November 21, 2007, 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. * On June 1, 2008, 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 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. * On July 24, 2008 the U.S. government announced its highest penalty for coal mine safety violations, $1.85 million, for the collapse.


Government conclusions

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.Year after mine collapse, many failures clear
''
Associated Press The Associated Press (AP) is an American non-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association. It produces news reports that are distributed to its members, U.S. new ...
'', Aug. 6, 2008, Retrieved 2008-08-06
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 mine failed to notify MSHA of the early danger signs, instead alerting the more industry-friendly
Bureau of Land Management The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering federal lands. Headquartered in Washington DC, and with oversight over , it governs one eighth of the country's ...
, when pillars started unexpectedly collapsing in March 2007. MSHA said recklessness by Agapito Associates "directly contributed to the death of nine people." 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 members that "the media is telling you lies" and "the union is your enemy." 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 hourly measurements. 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 another, a panel of experts determined, the firm overstated the strength of support pillars by a factor of two.


Memorials

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.
Granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies un ...
headstones for the six miners killed were created by American Monument to serve as markers. Granite
memorial bench A memorial bench, memorial seat or death bench is a piece of outdoor furniture which commemorates a dead person. Such benches are typically made of wood, but can also be made of metal, stone, or synthetic materials such as plastics. Typically mem ...
es were also created for the three rescuers killed and serve as
cenotaph A cenotaph is an empty tomb or a monument erected in honour of a person or group of people whose remains are elsewhere. It can also be the initial tomb for a person who has since been reinterred elsewhere. Although the vast majority of cenot ...
s. Another memorial to the August 2007 collapses can be found in Huntington, Utah. It is a
bronze statue Bronze is the most popular metal for cast metal sculptures; a cast bronze sculpture is often called simply "a bronze". It can be used for statues, singly or in groups, reliefs, and small statuettes and figurines, as well as bronze elements ...
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.""Crandall Canyon Mine Memorial"
Karen Jobe Templeton. Retrieved on August 5, 2012.


See also

* Wilberg Mine * Sago Mine * List of mining disasters


References


External links


Crandall Canyon Mine - MSHA.gov MiniSite
Contains vector-image maps of the affected area of the mine and drill hole map, and also the emergency response plan.
Utah Geological Survey 2005 Coal Report (Crandall Mine described on pp 7-8)Seismological Report on the 6 Aug 2007 Crandall Canyon Mine Collapse in Utah
from ''
Live Science Live Science is a science news website run by Future via Purch, which it purchased from Imaginova in 2009. Stories and editorial commentary are typically syndicated to major news outlets, such as Yahoo!, MSNBC, AOL, and Fox News.{{fact, date=Marc ...
''
Find A Grave: Crandall Canyon Mine.


{Dead link, date=April 2019 , bot=InternetArchiveBot , fix-attempted=yes Geography of Emery County, Utah Coal mines in the United States Coal mining disasters in Utah Underground mines in the United States 2007 mining disasters 2007 disasters in the United States Mines in Utah 2007 in Utah