Alaska Range - Revelation Mountains and Stink River Area, Alaska

Survey Area AK720• Alaska

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). The most common soil order is Inceptisols — young soils with minimal horizon development but more than Entisols. 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 Alaska Range - Revelation Mountains and Stink River Area, Alaska. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Interior Alaska Mountains-Boreal Upland and Subalpine-Glaciated Plains and Hills, Ash Influenced	836K	Well drained	B	Somewhat limited	Very limited
Interior Alaska Mountains-Boreal Subalpine and Alpine-Rounded Mountains, Ash Influenced	270K	Well drained	C	Very limited	Very limited
Interior Alaska Mountains-Boreal Alpine-Barren Mountains	173K			Very limited	Very limited
Interior Alaska Mountains-Boreal Subalpine and Alpine-Rugged Mountains	105K	Well drained	B	Very limited	Very limited
Interior Alaska Mountains-Boreal Upland and Subalpine-Mountain Valleys, Ash Influenced	93K	Well drained	B	Very limited	Very limited
Interior Alaska Mountains-Boreal Alpine-Rugged Mountains	68K	Well drained	B	Very limited	Very limited
Interior Alaska Mountains-Boreal Alpine-Glaciated Plains and Hills	60K	Well drained	B	Very limited	Very limited
Interior Alaska Mountains-Boreal Alpine-Mountain Valleys	44K	Well drained	B	Very limited	Very limited
Interior Alaska Mountains-Boreal Alpine-Mountain Valleys, Ash Influenced	35K			Very limited	Very limited
Interior Alaska Mountains-Boreal Lowland-Flood Plains, Terraces, and Fans	28K			Very limited	Very limited
Interior Alaska Mountains-Boreal Water, Fresh	9K			Not limited	Not limited
Interior Alaska Lowlands-Boreal Lowland-Flood Plains and Terraces, High Elevation	7K	Poorly drained	D	Very limited	Very limited
Yukon-Kuskokwim Highlands-Boreal Alpine and Subalpine-Rounded Mountains	7K	Well drained	B	Very limited	Very limited
Interior Alaska Mountains-Boreal Glaciated Plains and Hills	6K	Poorly drained	D	Very limited	Very limited
Interior Alaska Lowlands-Boreal Lowland-Peatlands and Alluvial Plains	2K	Poorly drained	D	Very limited	Very limited
Yukon-Kuskokwim Highlands-Boreal Upland-Rounded Mountains	619	Well drained	B	Very limited	Very limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

Gelisols

Permafrost soils. Extremely challenging for construction and septic. Found almost exclusively in Alaska.

Spodosols

Acidic forest soils with a leached layer. Common under conifers. Often have drainage issues from a compacted subsoil layer.

What This Means

Building & Foundations

About 51% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas. A geotechnical assessment is recommended before building.

Septic Systems

About 99% 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.