in which 263 men died (146 were Italian and 36 were Greek). The Second Dawson Disasters was a mining accident on February 8, 1923, in Dawson, New Mexico in which 123 men died. The Speculator Mine Disaster occurred in the copper mines of Butte, Montana on June 8, 1917. An electric cable being lowered into the mine was accidentally ignited at 2,500 feet below the surface. The fire quickly climbed the cable, in turn igniting the shaft. The shaft thus became a chimney, eliminating the mine's primary source of oxygen. Nearly all of the 168 fatalities were due to asphyxia. It remains the deadliest underground hard rock mining event in American history. The Hastings mine explosion was a fire at the Victor-American Fuel Company coal mine in Hastings, Las Animas Country, Colorado, On April 27, 1917, in which 121 people died. The Cherry Mine disaster was a fire in the Cherry, Illinois, coal mine in 1909, and surrounding events, in which 259 men and boys died. The Millfield Mine Disaster 1930 in Ohio killed 82 men. From 1880 to 1910, mine accidents claimed thousands of fatalities. Where annual mining deaths had numbered more than 1,000 a year during the early part of the 20th century, they decreased to an average of about 500 during the late 1950s, and to 93 during the 1990s. In addition to deaths, many thousands more are injured (an average of 21,351 injuries per year between 1991 and 1999), but overall there has been a downward trend of deaths and injuries. In 1959, the Knox Mine Disaster occurred in Port Griffith, Pennsylvania. The swelling Susquehanna River collapsed into a mine under it and resulted in 12 deaths. In Plymouth, Pennsylvania, the Avondale Mine Disaster of 1869 resulted in the deaths of 108 miners and two rescue workers after a fire in the only shaft eliminated the oxygen in the mine. Federal laws for mining safety resulted from this disaster. Pennsylvania suffered another disaster in 2002 at Quecreek, 9 miners were trapped underground and subsequently rescued after 78 hours. During 2006, 72 miners died at work, 47 by coal mining. The majority of these fatalities occurred in Kentucky and West Virginia, including the Sago Mine Disaster. On April 5, 2010, in the Upper Big Branch Mine disaster an underground explosion caused the deaths of 29 miners. The U.S. Bureau of Mines was created in 1910 to investigate