The Potash reach is one of the least sinuous (average sinuosity 1.1) of the 20 reaches defined by this project. This generally south-trending reach extends for 10 km from Bkm 100 just upstream of Potash to Bkm 90 near the south end of Pyramid Butte. This reach flows within a transverse valley that is cut within sub-horizontal strata of the lower Cutler Formation and, for about one 1.6 km, within the Honaker Trail Fm. This valley of the Potash reach is highly variable in shape, ranging from 825 to more than 1525 m wide and 60 to 275 m deep. The average gradient along this reach is approximately 0.03% slope.
This reach has a long history of industrial activity both in the river bottom and in the adjacent uplands. Vegetation is heavily dominated by shrubs: tamarisk (24%), willow (7%), native xeric species (7%), and desert olive (1%). Riparian trees are very uncommon, with less than one percent cover combined. Bare ground is relatively high (7%), both due to sand bars within the active channel area and disturbance on the floodplain surface.
Ownership of the Potash reach is mostly State (61%) and private (25%) with some BLM management. This reach has a long history of industrial activity both in the river bottom and in adjacent uplands.