Aleutian Islands - Agattu Island Area, Alaska
The dominant drainage class is Poorly drained and the dominant hydrologic group is C/D (varies with drainage). 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 Aleutian Islands - Agattu Island Area, Alaska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Aleutian Islands-Western Alaska Peninsula-Maritime Upland-Plains and Hills | 42K | Poorly drained | C/D | Very limited | Very limited |
| Aleutian Islands-Western Alaska Peninsula-Maritime Upland-Rugged Mountains | 13K | Well drained | B | Very limited | Very limited |
| Aleutian Islands-Western Alaska Peninsula-Maritime Water, Saline | 0 | Very limited | Very limited |
What This Means
Building & Foundations
About 100% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 100% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.