Southern Nulato Hills Area, Alaska
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). 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 Southern Nulato Hills Area, Alaska.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Nulato Hills-Southern Seward Peninsula Highlands-Boreal Upland and Maritime Upland-Hills and Plains, Gravelly | 216K | Poorly drained | D | Very limited | Very limited |
| Yukon-Kuskokwim Highlands-Boreal Upland-Rounded Mountains and Hills, Acid | 206K | Well drained | B | Somewhat limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Maritime Upland-Rounded Mountains, Acid | 159K | Very poorly drained | C | Very limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Maritime Upland-Rounded Mountains | 83K | Well drained | A | Very limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Boreal Upland and Maritime Upland-Rounded Mountains | 67K | Well drained | B | Very limited | Very limited |
| Yukon-Kuskokwim Highlands-Boreal Upland-Loess Hills | 65K | Poorly drained | D | Very limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Maritime Upland-Plains and Hills, Gravelly | 59K | Very poorly drained | D | Very limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Maritime Upland-Plains and Hills, Silty | 47K | Very poorly drained | B/D | Very limited | Very limited |
| Yukon-Kuskokwim Highlands, Boreal and Subalpine Low Mountains | 42K | Well drained | C | Very limited | Very limited |
| Yukon-Kuskokwim Highlands-Boreal Upland-Valleys | 30K | Poorly drained | D | Very limited | Very limited |
| Yukon-Kuskokwim Highlands-Boreal Alpine and Subalpine-Rounded Mountains | 28K | Well drained | B | Very limited | Very limited |
| Yukon-Kuskokwim Coastal Plain-Maritime Lowland-Coastal Plains, High | 19K | Poorly drained | D | Very limited | Very limited |
| Yukon-Kuskokwim Highlands, Boreal Hills | 13K | Well drained | D | Very limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Boreal Upland and Maritime Upland-Rounded Mountains, Acid | 13K | Well drained | C | Very limited | Very limited |
| Yukon-Kuskokwim Highlands, Boreal Flood Plains and Terraces | 11K | Moderately well drained | A | Very limited | Very limited |
| Yukon-Kuskokwim Coastal Plain-Boreal Lowland-Flood Plains and Terraces | 9K | Very poorly drained | B/D | Very limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Boreal Lowland-Flood Plains and Terraces | 6K | Somewhat poorly drained | B/D | Very limited | Very limited |
| Cilla-Pokercreek-Shortycove complex 4 to 20 percent slopes | 5K | Moderately well drained | B/D | Very limited | Very limited |
| Yukon-Kuskokwim Coastal Plain-Maritime Lowland-Flood Plains and Terraces | 5K | Very poorly drained | B/D | Very limited | Very limited |
| Nulato Hills-Southern Seward Peninsula Highlands-Maritime Lowland-Flood Plains and Terraces | 4K | Somewhat poorly drained | B/D | Very limited | Very limited |
What This Means
Building & Foundations
About 81% 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. 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.