Saint Paul Island 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 Saint Paul Island Area, Alaska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Typic Haplocryands, moderately deep-Lithic Haplocryands, rubbly, complex, 1 to 8 percent slopes | 3K | Well drained | D | Very limited | Very limited |
| Lukanin sand, 1 to 60 percent slopes | 3K | Well drained | A | Very limited | Very limited |
| Lithic Haplocryands, rubbly-Typic Haplocryands, moderately deep-Rock outcrop complex, 1 to 8 percent slopes | 3K | Well drained | C | Very limited | Very limited |
| Einahnuhto silty clay loam-Andic Haplocryods, rubbly, complex, 1 to 8 percent slopes | 2K | Moderately well drained | C | Very limited | Very limited |
| Typic Vitricryands, 4 to 75 percent slopes | 2K | Well drained | A | Very limited | Very limited |
| Water | 2K | Not rated | Not rated | ||
| Polovina fine sandy loam, 0 to 3 percent slopes | 2K | Well drained | B | Somewhat limited | Very limited |
| Tsammana sand, 1 to 8 percent slopes | 1K | Well drained | B | Somewhat limited | Very limited |
| Typic Dystrocryepts complex, undulating | 1K | Well drained | B | Very limited | Very limited |
| Polovina fine sandy loam, 1 to 8 percent slopes | 932 | Well drained | B | Somewhat limited | Very limited |
| Humic Vitricryands-Vitrandic Dystrocryepts complex, rolling | 889 | Well drained | B | Not limited | Very limited |
| Tsammana sand-Lithic Cryorthents complex, 0 to 3 percent slopes | 876 | Well drained | B | Very limited | Very limited |
| Zapadni fine sandy loam, 1 to 8 percent slopes | 686 | Well drained | A | Not limited | Very limited |
| Zolotoi complex, 1 to 8 percent slopes | 667 | Well drained | B | Very limited | Very limited |
| Zolotoi family-Einahnuhto complex, 1 to 8 percent slopes | 619 | Well drained | B | Very limited | Very limited |
| Aquic Dystrocryepts, 0 to 3 percent slopes | 576 | Somewhat poorly drained | C | Very limited | Very limited |
| Bogoslof silt loam, 0 to 3 percent slopes | 574 | Well drained | B | Not limited | Very limited |
| Lithic Haplocryands, gravelly, complex, 1 to 30 percent slopes | 530 | Well drained | D | Very limited | Very limited |
| Beaches, sandy | 493 | Not rated | Not rated | ||
| Lithic Cryofolists-Rock outcrop complex, 4 to 16 percent slopes | 375 | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 68% 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.