Uranium mine threatens Grand Canyon's underground water systems. The Pinyon Plain Mine sits just six miles from one of America's most treasured landscapes, the Grand Canyon. This uranium mine operates within the Kaibab National Forest, which forms the green shoulders of the canyon's rocky spine. While the mine itself lies outside Grand Canyon National Park boundaries, new research reveals it could threaten the entire ecosystem through underground water connections. Scientists discover hidden water highways Scientists from the University of New Mexico have discovered that the Grand...