Warm Springs Indian Reservation, Oregon
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Warm Springs Indian Reservation, Oregon.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Smiling-Simnasho complex, high precipitation, 0 to 12 percent slopes | 34K | Well drained | B | Not limited | Somewhat limited |
| Smiling-Simnasho complex, 0 to 12 percent slopes | 27K | Well drained | B | Not limited | Somewhat limited |
| Mackatie-Kutcher complex, low precipitation, 0 to 12 percent slopes | 25K | Well drained | B | Somewhat limited | Very limited |
| Watama-Rockly complex, 0 to 8 percent slopes | 24K | Well drained | C | Very limited | Very limited |
| Pinhead very gravelly sandy loam, warm, 0 to 12 percent slopes | 17K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Hehe-Teewee complex, high precipitation, 0 to 12 percent slopes | 17K | Well drained | C | Very limited | Very limited |
| Hehe-Teewee complex, 0 to 12 percent slopes | 15K | Well drained | C | Very limited | Very limited |
| Watama-Rockly-Prill complex, 2 to 30 percent slopes | 12K | Well drained | D | Very limited | Very limited |
| Howash very cobbly sandy loam, low precipitation, 12 to 30 percent slopes | 12K | Somewhat excessively drained | A | Very limited | Very limited |
| Pipp very stony sandy loam, 30 to 65 percent slopes | 11K | Somewhat excessively drained | A | Very limited | Very limited |
| Bakeoven-Maupin complex, 0 to 8 percent slopes | 11K | Well drained | D | Very limited | Very limited |
| Rockly-Watama complex, 0 to 8 percent slopes | 10K | Well drained | D | Very limited | Very limited |
| Howash very cobbly sandy loam, low precipitation, 30 to 65 percent slopes | 10K | Somewhat excessively drained | A | Very limited | Very limited |
| Mackatie-Kutcher complex, 0 to 12 percent slopes | 10K | Well drained | B | Somewhat limited | Very limited |
| Pinhead-Jojo complex, 0 to 12 percent slopes | 9K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Hehe-Bodell complex, 0 to 12 percent slopes | 9K | Well drained | C | Very limited | Very limited |
| Jojo-Piumpsha-Pinhead complex, 2 to 40 percent slopes, bouldery | 9K | Somewhat excessively drained | B | Very limited | Very limited |
| Rubble land-Rock outcrop complex, 30 to 80 percent slopes | 8K | Excessively drained | A | Very limited | Very limited |
| Simas-Antoken complex, 2 to 30 percent slopes | 8K | Well drained | C | Very limited | Very limited |
| Tenwalter-Milldam complex, 0 to 3 percent slopes | 8K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 57% 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 78% 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.