According to Winter Maintenance Operations Survey, 23 reporting states spent approximately $1.131 billion from October 2014 to mid-April 2015 to pre-treat, plow, or spread chemicals and other materials on roadways to keep them open and operating safely this winter season. Survey also found that state employees and contractors logged 8 million work hours, used fleet of more than 24,000 state snow plows and trucks, and used approximately 6 million tons of salt.