Lower Kenai Peninsula 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 Lower Kenai Peninsula Area, Alaska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Cryods-Cryorthents-Rock outcrop complex, 5 to 120 percent slopes | 45K | Well drained | B | Very limited | Very limited |
| Nanwalek-Rock outcrop complex, 65 to 120 percent slopes | 44K | Well drained | B | Very limited | Very limited |
| Kasitsna-Tutka complex, hilly to very steep | 13K | Well drained | B | Very limited | Very limited |
| Nanwalek-Kasitsna, cool complex, 25 to 65 percent slopes | 13K | Well drained | B | Very limited | Very limited |
| Nanwalek silt loam, 25 to 65 percent slopes | 12K | Well drained | B | Very limited | Very limited |
| Kasitsna-Nuka complex, nearly level to hilly | 11K | Well drained | B | Very limited | Very limited |
| Kasitsna-Tutka complex, rolling to steep | 8K | Well drained | B | Very limited | Very limited |
| Kasitsna-Tutka complex, 45 to 65 percent slopes | 8K | Well drained | B | Very limited | Very limited |
| Rock outcrop-Cryorthents, very steep | 5K | Not rated | Not rated | ||
| Kasitsna-Nuka-Tutka complex, nearly level to hilly | 5K | Well drained | D | Very limited | Very limited |
| Kasitsna silt loam, 15 to 25 percent slopes, cool | 5K | Well drained | B | Very limited | Very limited |
| Kasitsna silt loam, rolling to steep | 4K | Well drained | B | Very limited | Very limited |
| Nanwalek-Kasitsna, cool complex, 65 to 120 percent slopes | 3K | Well drained | B | Very limited | Very limited |
| Kasitsna-Kasitsna,cool-Seldovia complex, 45 to 65 percent slopes | 3K | Well drained | B | Very limited | Very limited |
| Kasitsna-Seldovia complex, 25 to 45 percent slopes | 3K | Well drained | B | Very limited | Very limited |
| Nanwalek silt loam, 25 to 65 percent slopes, warm | 3K | Well drained | B | Very limited | Very limited |
| Kasitsna-Seldovia-Portgraham complex, hilly to very steep | 2K | Well drained | B | Very limited | Very limited |
| Kasitsna-Tutka complex, 65 to 120 percent slopes | 2K | Well drained | B | Very limited | Very limited |
| Tutka silt loam, hilly to very steep | 2K | Well drained | D | Very limited | Very limited |
| Kasitsna-Seldovia-Portgraham complex, rolling to steep | 2K | 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.