| General Soil Type: | Ff | Region: | F |
| Map Unit Description: | Young, somewhat cool, dark-colored, wooded, alluvial soils of |
| low terraces; most soils are very deep, nearly level and well- to |
| somewhat poorly-drained |
| Moisture Regime: | Aquic to Xeric |
| Temperature Regime: | Mesic to Frigid |
| Taxonomic Classification: | Fluvaquentic Haplaquolls, Cumulic Haploxerolls, Fluventic |
| Haploxerolls |
| Major Soil Series: | Colville-Narcisse-Malo |