Yukon Flats Area, Alaska

Survey Area AK685• Alaska

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). The most common soil order is Gelisols — permafrost soils found in very cold climates. 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 Yukon Flats 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
Seventeenmile, sandy substratum-Typic Cryaquents, silty-Scaup association, 0 to 3 percent slopes	556K	Well drained	B	Not limited	Very limited
Water	446K			Not rated	Not rated
Typic Haplocryepts-Folistic Haplorthels-Typic Histoturbels complex, 3 to 35 percent slopes	418K	Well drained	C	Very limited	Very limited
Kingslough-Jokinaugh association, 0 to 3 percent slopes	406K	Poorly drained	C	Very limited	Very limited
Chissovun-Tajittro-Gushdoiman complex, 0 to 3 percent slopes	381K	Poorly drained	C/D	Very limited	Very limited
Typic Haplocryepts-Typic Histoturbels association, 3 to 35 percent slopes	313K	Well drained	C	Very limited	Very limited
Yanert-Nuntragut-Twin complex, 0 to 3 percent slopes	294K	Very poorly drained	C/D	Very limited	Very limited
Tlozhavun-Yasuda association, 0 to 3 percent slopes	291K	Well drained	B	Very limited	Very limited
Seventeenmile, sandy substratum-Draanjik-Yasuda complex, 0 to 3 percent slopes	271K	Well drained	B	Not limited	Very limited
Sussaymin-Gushdoiman-Hydric Cryofibrists, dysic complex, 0 to 1 percent slopes	264K	Very poorly drained	B/D	Very limited	Very limited
Tlozhavun-Choonjik-Tajittro-Yasuda complex, 0 to 3 percent slopes	263K	Well drained	B	Very limited	Very limited
Tlozhavun-Tajittro-Gwichin-Yasuda complex, 0 to 3 percent slopes	232K	Moderately well drained	C/D	Very limited	Very limited
Seventeenmile-Canvasback complex, 0 to 3 percent slopes	194K	Well drained	B	Not limited	Very limited
Gwichin-Nuntragut-Yasuda complex, 0 to 3 percent slopes	185K	Moderately well drained	C/D	Very limited	Very limited
Tajittro-Chissovun-Gushdoiman complex, 0 to 3 percent slopes	185K	Very poorly drained	C/D	Very limited	Very limited
Tajittro-Yanert complex, 0 to 3 percent slopes	173K	Moderately well drained	C/D	Very limited	Very limited
Typic Cryaquents, gravelly substratum-Typic Cryaquents, silty complex, 0 to 3 percent slopes	172K	Very poorly drained	B/D	Very limited	Very limited
Typic Histoturbels-Typic Haplocryepts association, 3 to 35 percent slopes	171K	Poorly drained	C/D	Very limited	Very limited
Seventeenmile-Yasuda association, 0 to 3 percent slopes	157K	Well drained	B	Not limited	Very limited
Seventeenmile-Kocacho complex, 0 to 3 percent slopes	157K	Well drained	B	Not 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.

Gelisols

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

Inceptisols

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

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

What This Means

Building & Foundations

About 67% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 91% 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

Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.