 Erosion is not a big threat in the northwestern part of the watershed, where the land is flat and developed, or in the northeast, dominated by low-erosion soils.In the southeast, soils have a medium risk of erosion, and soils around Powell Butte and the Boring Lava Domes have "an extremely high erodibility factor and are sensitive to ground disturbance".The watershed's soils vary in their permeability and ability to retain water.