Yentna Area, Alaska
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 Yentna Area, Alaska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Strandline-Spenard-Kroto complex, 2 to 30 percent slopes | 723K | Well drained | B | Very limited | Very limited |
| Starichkof peat, 0 to 7 percent slopes | 246K | Very poorly drained | D | Very limited | Very limited |
| Salamatof peat, 0 to 2 percent slopes | 199K | Very poorly drained | D | Very limited | Very limited |
| Killey and Hiline silt loams, 0 to 2 percent slopes | 161K | Very poorly drained | D | Very limited | Very limited |
| Chuit and Nakochna silt loams, 3 to 30 percent slopes | 145K | Well drained | D | Very limited | Very limited |
| Chichantna peat, 0 to 8 percent slopes | 134K | Very poorly drained | D | Very limited | Very limited |
| Water | 122K | Not rated | Not rated | ||
| Rubble land | 110K | Excessively drained | A | Not rated | Not rated |
| Puntilla silt loam, 7 to 20 percent slopes | 110K | Well drained | B | Somewhat limited | Very limited |
| Chuit-Nakochna-Rubble land complex, 7 to 45 percent slopes | 106K | Well drained | D | Very limited | Very limited |
| Strandline-Kroto complex, 20 to 45 percent slopes | 96K | Well drained | B | Very limited | Very limited |
| Nancy-Kashwitna complex, 0 to 2 percent slopes | 92K | Well drained | B | Not limited | Very limited |
| Kroto-Strandline-Cryorthents complex, 30 to 45 percent slopes | 90K | Well drained | B | Very limited | Very limited |
| Hewitt peat, 0 to 2 percent slopes | 86K | Very poorly drained | D | Very limited | Very limited |
| Spenard silt loam, 0 to 7 percent slopes | 81K | Very poorly drained | D | Very limited | Very limited |
| Puntilla silt loam, 30 to 45 percent slopes | 68K | Well drained | B | Very limited | Very limited |
| Puntilla silt loam, 20 to 30 percent slopes | 59K | Well drained | B | Very limited | Very limited |
| Slikok muck, 0 to 5 percent slopes | 56K | Very poorly drained | D | Very limited | Very limited |
| Doroshin peat, 0 to 5 percent slopes | 53K | Very poorly drained | D | Very limited | Very limited |
| Nancy-Kashwitna complex, 2 to 7 percent slopes | 45K | Well drained | B | Not limited | Very limited |
What This Means
Building & Foundations
About 82% 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 91% 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.