Tillamook County, 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 Tillamook County, Oregon.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Klistan-Harslow-Hemcross complex, 60 to 90 percent slopes | 83K | Well drained | B | Very limited | Very limited |
| Klootchie-Necanicum complex, 30 to 60 percent slopes | 70K | Well drained | B | Very limited | Very limited |
| Necanicum-Ascar-Klootchie complex, 60 to 90 percent slopes | 68K | Well drained | B | Very limited | Very limited |
| Hemcross-Klistan complex, 30 to 60 percent slopes | 62K | Well drained | B | Very limited | Very limited |
| Murtip-Caterl-Laderly complex, 30 to 60 percent slopes | 33K | Well drained | B | Very limited | Very limited |
| Caterl-Laderly-Murtip complex, 60 to 90 percent slopes | 27K | Well drained | B | Very limited | Very limited |
| Templeton-Ecola medial silt loams, 30 to 60 percent slopes | 19K | Well drained | B | Very limited | Very limited |
| Murtip-Caterl-Laderly complex, 5 to 30 percent slopes | 16K | Well drained | B | Very limited | Very limited |
| Water | 16K | Not rated | Not rated | ||
| Templeton-Klootchie complex, 30 to 60 percent slopes | 15K | Well drained | B | Very limited | Very limited |
| Ginsberg medial loam, 5 to 30 percent slopes | 14K | Well drained | C | Very limited | Very limited |
| Hemcross-Klistan complex, 5 to 30 percent slopes | 13K | Well drained | B | Very limited | Very limited |
| Harslow-Klistan-Rock outcrop complex, 60 to 90 percent slopes | 13K | Well drained | C | Very limited | Very limited |
| Tolovana-Templeton medial silt loams, 30 to 60 percent slopes | 12K | Well drained | C | Very limited | Very limited |
| Munsoncreek-Flowerpot complex, 5 to 30 percent slopes | 12K | Well drained | C | Very limited | Very limited |
| Klootchie medial silt loam, 30 to 60 percent slopes | 11K | Well drained | B | Very limited | Very limited |
| Ginsberg-Klistan complex, 30 to 60 percent slopes | 11K | Well drained | C | Very limited | Very limited |
| Klootchie-Necanicum complex, 5 to 30 percent slopes | 10K | Well drained | B | Very limited | Very limited |
| Harslow-Rock outcrop-Klistan complex, 60 to 90 percent south slopes | 10K | Well drained | C | Very limited | Very limited |
| Templeton-Necanicum complex, 30 to 60 percent slopes | 10K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 97% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes. A geotechnical assessment is recommended before building.
Septic Systems
About 97% 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.