Thiessen Canyon is located within Nez Perce County, Idaho and is a tributary to the Snake River (shown as number 25 in Figure 1). The watershed encompasses approximately 661 acres.
Figure 1. Thiessen Canyon Watershed location. Click on image to view larger version.
The USDA Soil Survey for Lewis/Nez Perce counties was used to determine the extent of hydric soils within the watershed. Approximately 4 acres were identified and are illustrated in figure 2 (shown in light blue).
Figure 2. Thiessen Canyon hydric soils.