North Ferry Area, Washington
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 North Ferry Area, Washington.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Nevine loam, 0 to 30 percent slopes | 58K | Well drained | C | Very limited | Very limited |
| Rock land | 46K | Very limited | Very limited | ||
| Growden fine sandy loam, 35 to 65 percent slopes | 30K | Well drained | A | Very limited | Very limited |
| Nevine-Rock land complex, 15 to 50 percent slopes | 27K | Well drained | C | Very limited | Very limited |
| Molson stony loam, 25 to 40 percent slopes | 26K | Well drained | B | Very limited | Very limited |
| Vallan-Rock land complex, 15 to 50 percent slopes | 23K | Well drained | D | Very limited | Very limited |
| Togo loam, 35 to 65 percent slopes | 22K | Well drained | B | Very limited | Very limited |
| Scar sandy loam, 0 to 15 percent slopes | 22K | Well drained | B | Not limited | Very limited |
| Nevine loam, 30 to 45 percent slopes | 22K | Well drained | C | Very limited | Very limited |
| Molson-Rock land complex, 15 to 50 percent slopes | 20K | Well drained | B | Very limited | Very limited |
| Pepoon-Oxerine complex, 15 to 50 percent slopes | 19K | Well drained | D | Very limited | Very limited |
| Manley silt loam, 15 to 35 percent slopes | 19K | Well drained | C | Very limited | Very limited |
| Nevine silt loam, 15 to 35 percent slopes | 18K | Well drained | C | Very limited | Very limited |
| Merkel sandy loam, 15 to 35 percent slopes | 17K | Well drained | B | Very limited | Very limited |
| Vallan-Tenas complex, 35 to 65 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Torboy sandy loam, 5 to 25 percent slopes | 14K | Well drained | A | Very limited | Very limited |
| Bamber-Rock land complex, 15 to 50 percent slopes | 14K | Well drained | B | Very limited | Very limited |
| Togo-Rock land complex, 15 to 50 percent slopes | 13K | Well drained | B | Very limited | Very limited |
| Togo loam, 15 to 35 percent slopes | 13K | Well drained | B | Very limited | Very limited |
| Shaskit-Tonata complex | 12K | Somewhat poorly drained | C | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 92% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas. 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.