BY JON KOVASH
Twice a year, the Cameco uranium mine in central Wyoming sends a truckload of a mining byproduct known in the trade as “barium sludge” to the White Mesa uranium mill south of Blanding. The last two truckloads have resulted in highway spills. The most recent was on March 29th. Ken Vaughn is a Cameco spokesman for the Smith Ranch uranium mine, which is near Casper, Wyoming...