DENVER (AP) — Two Colorado miners who died of carbon monoxide poisoning apparently entered an area of the mine where an explosive had been previously detonated, federal investigators said Monday.
Nick Cappanno, 34, of Montrose and Rick Williams, 59, of Durango were killed at the start of their shift Sunday morning at the Revenue-Virginius mine near Ouray (yoo-RAY') in southwestern Colorado.
Preliminary information indicates one of the men entered the area first, said Amy Louviere, a spokeswoman for the U.S. Mine Safety and Health Administration, which is investigating the deaths.
When the first miner didn't return, she said, a foreman went looking for him. Both men were later found by other miners working in the area, and those miners immediately evacuated the underground gold, silver and lead mine, she said.
Mine manager Rory Williams previously said there was a blast in the mine to remove rock on Saturday that may have been a source of the carbon monoxide. Louviere said the blast occurred during the previous shift, so it likely happened on Saturday.
Williams, who isn't related to Rick Williams, said he knew both miners.
"They were great men. They will be remembered indeed," he said.
Nineteen miners were taken to a hospital for treatment and all have been released.
About 100 miners work at the site, about 270 miles southwest of Denver, which will be closed until the end of the investigation.
At a news conference late Sunday, Rory Williams said all of the miners had air packs to help them breathe in an emergency, but he didn't know whether they carried gas detectors to alert them to dangerous levels of carbon monoxide. He said there didn't appear to be any equipment malfunction.
He didn't return a call Monday seeking further details.
Regulators weren't aware of any previous carbon monoxide problems.
Carbon monoxide exposure is a longstanding problem within the mining industry — the invisible, odorless "silent killer" can quickly overwhelm its victims at high concentrations, said Tom Hethmon, a mine safety expert from the University of Utah. It results from the incomplete combustion of gas, wood or other fuels, and in mines can come from machinery or the use of explosives to blast rock.
Improvements in ventilation practices have helped reduce accidents, Hethmon said. But if ventilation systems fail or the volume of gas is too great, carbon monoxide can overwhelm those exposed in a matter of seconds, he said.
Short-term symptoms of exposure include dizziness, confusion and headache. Miners are typically required to carry or have ready access to portable, self-rescue breathing devices that provide enough oxygen to last about 45 minutes to an hour.
Robert Ferriter, a senior mine safety specialist at the Colorado School of Mines, said routine air tests done after blasting should have detected any problems from earlier blasting at the Revenue mine.
"The big question here is how you got 20 people exposed to such a massive amount of carbon monoxide," he said.
The mine dates to the 1870s and was taken over by its current owner, Denver-based Star Mine Operations, in 2011. The company, which also has a mine in Cerro Blanco, Peru, received a permit to resume mining at the site near Ouray in February 2013. All the mining is done by drilling and blasting, according to state regulators.
Federal records show the mine reported eight employee accidents in the past two years, including five that resulted in days away from work for the injured worker.
The mine has received 33 citations since Star Mine became the operator, including 13 that regulators determined were reasonably likely to result in injury or illness. The most recent came last month after inspectors found tire chains stacked in a walking area that created a tripping hazard.
Brown reported from Billings, Mont.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
An Oklahoma mother was in San Diego Monday, as she drives across the country in her 15th Caravan to Catch a Killer.
On Memorial Day, some veterans are on mission as they continue their fight to prevent veteran suicide.
A May grey Memorial Day had two San Diego drivers seeing red after a suspected road rage incident turned violent Monday.
Rookie Hunter Renfroe hit a grand slam off Kyle Hendricks that helped quiet all the Chicago Cubs fans at Petco Park and overshadow a shaky day by San Diego Padres pitchers.
For a solemn occasion, hundreds surrounded Mt. Soledad National Veterans Memorial for the Memorial Day program emceed by AM 760's Brett Winterble.
A military family in Claremont said it's something that may never happen again - a father and eight of his sons went off to war and all came home alive.
Vice Adm. Nora Tyson, commander of the Navy's Third Fleet, was the keynote speaker Monday at the annual Memorial Day observance at the Fort Rosecrans National Cemetery.
The county Medical Examiner's Office Monday released the name of a man killed after being struck by a passenger train.
Mayor Kevin Faulconer and his aides met with SoccerCity investors 25 times between January 2016 and this past February, the San Diego Union-Tribune reported Monday.