Lamo soils are fine-silty and contain less salts. Salmo soils are fine-silty and are on similar landscapes. Wann soils are coarse-loamy and are on higher parts of the floodplain. Poorly drained or very poorly drained. Surface runoff is very slow or ponded.
Permeability is slow or very slow.
The soils are subject to occasional or frequent flooding from stream overflow. A water table is near the surface during the spring and at depths of 4 to 5 feet in the fall. Native grasses include prairie cordgrass, inland saltgrass, switchgrass, and western wheatgrass. The series is of small extent.