North Ogilvie Mountains - Step Mountains 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 North Ogilvie Mountains - Step Mountains Area, Alaska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Interior Alaska Highlands-Boreal Upland and Subalpine-Rounded Mountains | 157K | Well drained | B | Not limited | Very limited |
| Interior Alaska Highlands-Boreal Upland-Hills and Plains | 45K | Poorly drained | D | Very limited | Very limited |
| Interior Alaska Highlands-Boreal Lowland-Flood Plains and Terraces | 16K | Poorly drained | D | Very limited | Very limited |
| Interior Alaska Highlands-Boreal Upland-Rounded Mountains, Acid | 11K | Well drained | A | Very limited | Very limited |
| Interior Alaska Highlands-Boreal Alpine and Upland-Rugged Mountains | 5K | Well drained | B | Very limited | Very limited |
What This Means
Building & Foundations
About 33% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 100% 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.