Six Rivers National Forest Area, California
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Six Rivers National Forest Area, California.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Clallam family, moderately deep-Hugo family, deep,maymen family association, 35 to 70 percent slopes | 76K | Well drained | C | Very limited | Very limited |
| Skalan-Kristirn-Holland families association, deep, 35 to 70 percent slopes | 65K | Well drained | C | Very limited | Very limited |
| Jayel family, moderately deep-Walnett family, deep-Lithic Xerochrepts, ultramafic association, stony, 35 to 75 percent slopes | 46K | Well drained | C | Very limited | Very limited |
| Hugo family, moderately deep, 50 to 70 percent slopes | 45K | Well drained | C | Very limited | Very limited |
| Clallam-Hugo-Holland families association, deep, dry, 35 to 70 percent slopes | 43K | Well drained | B | Very limited | Very limited |
| Clallam-Hugo-Holland families association, deep, 35 to 70 percent slopes | 33K | Well drained | B | Very limited | Very limited |
| Nanny fanily, deep-Woodseye family-Bins family, deep association, 35 to 70 percent slopes | 30K | Well drained | B | Very limited | Very limited |
| Rock outcrop-Xerorthents complex,metaigneous, 60 to 90 percent slopes | 27K | Excessively drained | D | Very limited | Very limited |
| Deadwood family-Clallam family, deep, extremely gravelly-Rock outcrop, metasedimentary association, 45 to 85 percent slopes | 27K | Well drained | D | Very limited | Very limited |
| Clallam family, moderately deep, 50 to 70 percent slopes | 27K | Well drained | C | Very limited | Very limited |
| Melbourne-Holland families association, deep, 35 to 70 percent slopes | 26K | Well drained | C | Very limited | Very limited |
| Clallam family, extremely gravelly-Skalan-Goldridge families,deep, 35 to 70 percent slopes | 25K | Well drained | C | Very limited | Very limited |
| Clallam family, moderately deep-Maymen family association, 45 to 80 percent slopes | 25K | Well drained | C | Very limited | Very limited |
| Gasquet-Walnett families, deep,stony-Jayel family, moderately deep association, 10 to 50 percent slopes | 25K | Well drained | C | Very limited | Very limited |
| Clallam family, deep, extremely gravelly-Deawood family association, 35 to 75 percent slopes | 23K | Well drained | B | Very limited | Very limited |
| Doty-Hecker families association, deep, 25 to 70 percent slopes | 23K | Well drained | B | Very limited | Very limited |
| Kistirn-Goldridge families, deep-Deadwood family association, 30 to 70 percent slopes | 21K | Well drained | C | Very limited | Very limited |
| Clallam family, moderately deep, unstable-Melbourne family, deep association, 35 to 70 percent slopes | 17K | Well drained | C | Very limited | Very limited |
| Jayel family, moderately deep, stony-Walnett family, deep, stony-Oragran family complex, 5 to 35 percent slopes | 16K | Well drained | C | Very limited | Very limited |
| Holland-Goldridge families association, deep, 5 to 35 percent slopes | 15K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 100% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes. A geotechnical assessment is recommended before building.
Septic Systems
About 100% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.