Douglas County Area, Oregon
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 Douglas County Area, Oregon.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Damewood-Bohannon-Umpcoos complex, 60 to 90 percent slopes | 97K | Well drained | B | Very limited | Very limited |
| Digger-Bohannon-Umpcoos complex, 60 to 90 percent slopes | 77K | Well drained | B | Very limited | Very limited |
| Josephine-Speaker complex, 30 to 60 percent south slopes | 60K | Well drained | C | Very limited | Very limited |
| Kanid-Atring complex, 60 to 90 percent north slopes, low precip, MLRA 5 | 54K | Well drained | A | Very limited | Very limited |
| Bateman silt loam, 30 to 60 percent slopes | 46K | Well drained | C | Very limited | Very limited |
| Acker-Norling complex, 30 to 60 percent north slopes | 42K | Well drained | C | Very limited | Very limited |
| Beekman-Vermisa complex, 60 to 90 percent south slopes | 39K | Well drained | C | Very limited | Very limited |
| Acker-Norling complex, 30 to 60 percent south slopes, low precip MLRA 5 | 36K | Well drained | C | Very limited | Very limited |
| Digger-Umpcoos-Rock outcrop complex, 60 to 90 percent slopes | 36K | Well drained | D | Very limited | Very limited |
| Millicoma-Reedsport complex, 60 to 90 percent slopes | 35K | Well drained | C | Very limited | Very limited |
| Windygap silt loam, 12 to 30 percent slopes | 34K | Well drained | C | Very limited | Very limited |
| Water | 32K | Not rated | Not rated | ||
| Honeygrove gravelly clay loam, 3 to 30 percent slopes | 32K | Well drained | C | Very limited | Very limited |
| Preacher-Bohannon-Xanadu complex, 30 to 60 percent slopes | 28K | Well drained | B | Very limited | Very limited |
| Umpcoos-Rock outcrop-Damewood complex, 60 to 90 percent slopes | 27K | Well drained | D | Very limited | Very limited |
| Orford gravelly loam, 30 to 60 percent slopes | 26K | Well drained | C | Very limited | Very limited |
| Philomath-Dixonville complex, 30 to 70 percent slopes | 25K | Well drained | D | Very limited | Very limited |
| Klickitat-Kinney complex, 30 to 60 percent slopes | 25K | Well drained | B | Very limited | Very limited |
| Atring-Larmine complex, 60 to 90 percent slopes | 24K | Well drained | B | Very limited | Very limited |
| Bohannon-Preacher-Damewood complex, 60 to 90 percent slopes | 23K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 96% 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 96% 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.