Skyline Abandoned Uranium Mine, Oljeto Mesa, Oljato-Monument Valley (Navajo: Ooljéé'tó), San Juan County, Navajo Nation, Utah. 21-4-2018, 14:49.

The gray streaks in the middle section of Oljeto Mesa is where contaminated soil was released and hosed down in August 2011. The U.S. Environmental Protection Agency's $7.5 million project used a cable system to transport over 15 million liters of material up the 244 meters-high Oljeto Mesa, where it was brought from by wind and water. The contaminated area around the residences registered 9000-20000 gamma counts/minute. At the foot of the mesa, measurements indicated above 50000 counts/minute in several spots.

US EPA's response on Skyline AUM

Nikon D500, AF-S Nikkor 16-85/3.5-5.6G ED VR, 1/160 sec, f/9, ISO 200, FL=52 mm, WB: 5400K