One construction worker was killed and one was injured after exploding gout material from a tunnel they were working on hit them. The accident happened near Lake Mead National Recreation Area, just east of Las Vegas.
The men were in a three-foot diameter tunnel assembling a tunnel ring when part of it became loose, causing the grout to explode. The second worker is described as sustaining only minor injuries, Fox News reports.
Constructing the tunnel has shown to be problematic since work started in 2009. Cave-ins, flooding, and lost mining equipment has plagued the efforts to build a third tunnel to transport drinking water to Las Vegas.