Chuska soils have a duripan 4 to 12 inches thick, and mean annual soil temperatures of less than 50 degrees F., Pipeline soils have less than 15 percent rock fragments in the control section, and less than 15 percent fine sand and coarser. Elevations are 4,000 to 7,000 feet. They formed in alluvium derived mainly from volcanic rocks. Slopes are 2 to 30 percent. These are the Stewval and Veet soils.
Stewval soils have a lithic contact.
Veet soils lack cementation. Present vegetation is mainly Wyoming big sagebrush, bottlebrush squirreltail and Indian ricegrass. These soils are of small extent.