Lake County, Oregon, Southern Part
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high 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 Lake County, Oregon, Southern Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Water | 88K | D | Not rated | Not rated | |
| Freznik very stony loam, thin surface, 2 to 15 percent slopes | 72K | Well drained | D | Very limited | Very limited |
| Floke complex, 2 to 15 percent slopes | 67K | Well drained | D | Very limited | Very limited |
| Brace-Raz complex, 2 to 15 percent slopes | 61K | Well drained | C | Very limited | Very limited |
| Anawalt loam, 2 to 8 percent slopes | 59K | Well drained | D | Very limited | Very limited |
| Ratto-Coglin complex, 2 to 15 percent slopes | 33K | Well drained | D | Very limited | Very limited |
| Hart very gravelly loam, 2 to 15 percent slopes | 29K | Well drained | D | Somewhat limited | Very limited |
| Booth very stony loam, 2 to 15 percent slopes | 27K | Well drained | D | Very limited | Very limited |
| Playas | 25K | Poorly drained | Very limited | Very limited | |
| Woodchopper-Rogger complex, 0 to 15 percent slopes | 25K | Well drained | C | Very limited | Very limited |
| Kewake-Helphenstein complex, 0 to 15 percent slopes | 21K | Excessively drained | A | Not limited | Very limited |
| Drews loam, 0 to 5 percent slopes, goose lake valley, northern part, mlra 21 | 19K | Well drained | C | Not limited | Very limited |
| Rock outcrop-Lonegrave association, 30 to 70 percent south slopes | 19K | D | Very limited | Very limited | |
| Newlands-Ninemile complex, 5 to 15 percent slopes | 19K | Well drained | C | Somewhat limited | Very limited |
| Carryback very cobbly loam, 2 to 15 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Corral fine sandy loam, 2 to 15 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Ozamis silty clay loam, 0 to 1 percent slopes | 18K | Poorly drained | C/D | Very limited | Very limited |
| Icene-Playas complex, 0 to 1 percent slopes | 17K | Moderately well drained | C | Somewhat limited | Somewhat limited |
| Raz-Brace complex, 2 to 20 percent slopes, south lake area, mlra 23 | 17K | Well drained | D | Very limited | Very limited |
| Drakesflat-Coglin complex, 2 to 15 percent slopes | 17K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 71% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 84% 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.