Boundary Range - Chilkat River Area, Alaska
The dominant drainage class is Moderately well drained and the dominant hydrologic group is B/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 Boundary Range - Chilkat River Area, Alaska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Southern Alaska Coastal Mountains-Maritime Subalpine and Alpine-Mountains | 22K | Very limited | Very limited | ||
| Southern Alaska Coastal Mountains-Maritime Alpine-Barren Mountains | 8K | Not rated | Not rated | ||
| Southern Alaska Coastal Mountains-Maritime Upland-Mountains | 999 | Moderately well drained | B/D | Very limited | Very limited |
What This Means
Building & Foundations
About 75% 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 75% 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.