Jackson County Area, Oregon, Parts of Jackson and Klamath Counties
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 Jackson County Area, Oregon, Parts of Jackson and Klamath Counties.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Pokegema-Woodcock complex, 1 to 12 percent slopes, mlra 21 | 77K | Well drained | C | Somewhat limited | Very limited |
| Vannoy-Voorhies complex, 35 to 55 percent south slopes, MLRA 5 | 54K | Well drained | C | Very limited | Very limited |
| Caris-Offenbacher gravelly loams, 50 to 75 percent south slopes | 43K | Well drained | C | Very limited | Very limited |
| Caris-Offenbacher gravelly loams, 50 to 80 percent north slopes | 43K | Well drained | C | Very limited | Very limited |
| Medco-McMullin complex, 12 to 50 percent slopes | 37K | Moderately well drained | D | Very limited | Very limited |
| Vannoy silt loam, 12 to 35 percent south slopes | 34K | Well drained | C | Very limited | Very limited |
| McNull-Medco complex, high precipitation, 12 to 50 percent slopes | 33K | Well drained | D | Very limited | Very limited |
| Woodcock-Pokegema complex, 12 to 35 percent south slopes, mlra 21 | 33K | Well drained | A | Very limited | Very limited |
| McMullin-Rock outcrop complex, 35 to 60 percent slopes | 31K | Well drained | D | Very limited | Very limited |
| Pinehurst-Greystoke complex, 1 to 12 percent slopes | 31K | Well drained | C | Somewhat limited | Very limited |
| Carney clay, 5 to 20 percent slopes | 30K | Moderately well drained | D | Very limited | Very limited |
| Vannoy silt loam, 35 to 75 percent north slopes, MLRA 5 | 23K | Well drained | C | Very limited | Very limited |
| McMullin-Rock outcrop complex, 3 to 35 percent slopes | 22K | Well drained | D | Very limited | Very limited |
| Agate-Winlo complex, 0 to 5 percent slopes | 21K | Well drained | C | Somewhat limited | Very limited |
| Woodcock-Pokegema complex, 12 to 35 percent north slopes, mlra 21 | 20K | Well drained | A | Very limited | Very limited |
| Farva very cobbly loam, 12 to 35 percent south slopes | 19K | Well drained | B | Very limited | Very limited |
| Freezener gravelly loam, 12 to 35 percent south slopes | 19K | Well drained | C | Very limited | Very limited |
| Carney cobbly clay, 20 to 35 percent slopes | 18K | Moderately well drained | D | Very limited | Very limited |
| McNull loam, 12 to 35 percent north slopes | 18K | Well drained | D | Very limited | Very limited |
| Farva very cobbly loam, 12 to 35 percent north slopes | 17K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 79% 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.