Winema National Forest Area, Oregon
The dominant drainage class is Excessively drained and the dominant hydrologic group is A (high infiltration, low 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 Winema National Forest Area, Oregon.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Lapine paragravelly ashy coarse sandy loam, 2 to 12 percent slopes | 212K | Excessively drained | A | Not limited | Very limited |
| Lapine paragravelly ashy coarse sandy loam, high precipitation, cool, 2 to 12 percent slopes | 66K | Excessively drained | A | Not limited | Very limited |
| Shukash paragravelly ashy loamy coarse sand, 2 to 12 percent slopes | 58K | Somewhat excessively drained | A | Not limited | Very limited |
| Collier-Maklak complex, 1 to 4 percent slopes | 53K | Somewhat excessively drained | A | Not limited | Very limited |
| Lapine paragravelly ashy coarse sandy loam, cold, 1 to 6 percent slopes | 46K | Excessively drained | A | Not limited | Very limited |
| Steiger, moderately deep dense substratum-Maklak, cold complex 1 to 4 percent slopes | 42K | Somewhat excessively drained | A | Not limited | Very limited |
| Steiger, moderately deep dense substratum-Lapine complex, 0 to 8 percent slopes | 39K | Somewhat excessively drained | A | Not limited | Very limited |
| Collier-Maklak complex, cold, 0 to 2 percent slopes | 38K | Somewhat excessively drained | A | Not limited | Very limited |
| Kyotesue very gravelly medial loam, very bouldery, 15 to 50 percent slopes | 38K | Well drained | B | Very limited | Very limited |
| Lapine, fine sand substratum-Pickedup complex, 0 to 12 percent slopes | 30K | Excessively drained | A | Not limited | Very limited |
| Grousehill-Grousehill, wet complex, 2 to 20 percent slopes | 26K | Moderately well drained | B/D | Very limited | Very limited |
| Lapine-Lapine, high precipitation, cool association, 12 to 35 percent slopes | 26K | Excessively drained | A | Very limited | Very limited |
| Collier-Onionpie-Maklak complex, warm, 2 to 8 percent slopes | 25K | Somewhat excessively drained | A | Not limited | Very limited |
| Aspenbutte-Skylake complex, 4 to 20 percent slopes | 25K | Well drained | B | Somewhat limited | Somewhat limited |
| Shukash paragravelly ashy loamy coarse sand, warm, 2 to 12 percent slopes | 22K | Somewhat excessively drained | A | Not limited | Very limited |
| Chinchallo mucky diatomaceous silt, frequently ponded, 0 to 1 percent slopes | 21K | Poorly drained | C/D | Very limited | Very limited |
| Lapine paragravelly ashy coarse sandy loam, high precipitation, 12 to 35 percent slopes | 20K | Excessively drained | A | Very limited | Very limited |
| Lapine paragravelly ashy coarse sandy loam, high precipitation, cool, 12 to 35 percent slopes | 20K | Excessively drained | A | Very limited | Very limited |
| Lapine paragravelly ashy coarse sandy loam, warm, dry, 2 to 12 percent slopes | 20K | Excessively drained | A | Not limited | Very limited |
| Yamsay muck, very long ponding, frequently ponded, 0 to 1 percent slopes | 18K | Very poorly drained | A/D | Very limited | Very limited |
What This Means
Building & Foundations
Most soils are generally favorable for residential construction. Standard foundations are usually viable, though site-specific evaluation is always recommended.
Septic Systems
About 97% of soils are rated "very limited" for septic absorption fields. The well-drained soils may actually drain too fast for standard leach fields, allowing effluent to reach groundwater. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Soils tend to drain very quickly, meaning nutrients and water don't stick around long. Raised beds with amended soil, drip irrigation, and heavy mulching will give the best results. Compost is your best friend here — it improves water retention dramatically.