Soil survey area

Phillips County Area, Montana

Survey Area MT641• Montana
The short version

The most common soil here is Kevin, on about 10% of the land: a clay loam, firm and a little sticky. Scobey and Phillips come next.

About 96% of the land drains well.

USDA rates 88% of the land very limited for a standard septic drain field, and 48% very limited for homes with basements. That means extra cost or special design, not that it can't be done.

Worth knowing: bedrock lies within 40 inches under 26% of it.

Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.

The ground underfoot

The soils you're most likely standing on

The biggest named soils in Phillips County Area, Montana, each drawn five feet deep from its official USDA description, in its recorded colors.

Kevin
10% of the area
Clay loam topsoil · well drained
Firm and a little sticky. Holds water and nutrients well.
Mollisols
Scobey
8% of the area
Clay loam topsoil · well drained
Firm and a little sticky. Holds water and nutrients well.
Mollisols
Phillips
7% of the area
Loam topsoil · well drained
A balanced mix that crumbles in your hand. The gardener's ideal.
Alfisols
Neldore
7% of the area
Clay topsoil · well drained
Sticky when wet and rock-hard when dry. Drains slowly.
Entisols
Hillon
7% of the area
Loam topsoil · well drained
A balanced mix that crumbles in your hand. The gardener's ideal.
Entisols
Elloam
6% of the area
Loam topsoil · well drained
A balanced mix that crumbles in your hand. The gardener's ideal.
Alfisols

Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.

The biggest mapped areas

The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 Phillips County Area, Montana. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Scobey-Kevin clay loams, 2 to 8 percent slopes 234K Well drainedCSomewhat limitedVery limited
Kevin-Scobey-Phillips association, 2 to 15 percent slopes 147K Well drainedCSomewhat limitedVery limited
Kevin-Elloam complex, 2 to 8 percent slopes 127K Well drainedCSomewhat limitedVery limited
Neldore-Bascovy-Rock outcrop complex, 15 to 60 percent slopes 114K Well drainedDVery limitedVery limited
Neldore-Bascovy clays, 8 to 25 percent slopes 104K Well drainedDVery limitedVery limited
Thoeny-Elloam-Absher complex, 0 to 4 percent slopes 99K Well drainedDSomewhat limitedNot limited
Phillips-Absher complex, 0 to 4 percent slopes 89K Well drainedCSomewhat limitedVery limited
Phillips-Elloam complex, 0 to 4 percent slopes 87K Well drainedCSomewhat limitedVery limited
Scobey-Phillips complex, 0 to 4 percent slopes 86K Well drainedCSomewhat limitedVery limited
Hillon clay loam, 15 to 60 percent slopes 86K Well drainedCVery limitedVery limited
Elloam-Absher complex, 0 to 4 percent slopes 83K Well drainedDSomewhat limitedNot limited
Sunburst-Neldore complex, 15 to 60 percent slopes 75K Well drainedCVery limitedVery limited
Elloam-Phillips-Absher association, 0 to 8 percent slopes 74K Well drainedDSomewhat limitedVery limited
Marvan-Vanda clays, 0 to 8 percent slopes 66K Well drainedDVery limitedVery limited
Telstad-Joplin loams, 2 to 8 percent slopes 61K Well drainedCSomewhat limitedVery limited
Yawdim-Cabbart-Rock outcrop association, 25 to 70 percent slopes 56K Well drainedDVery limitedVery limited
Phillips-Elloam complex, 2 to 8 percent slopes 55K Well drainedCSomewhat limitedVery limited
Hillon-Cabbart loams, 15 to 60 percent slopes 55K Well drainedCVery limitedVery limited
Water 53K Not ratedNot rated
Sunburst-Bascovy-Neldore complex, 8 to 25 percent slopes 43K Well drainedDVery limitedVery 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.

Mollisols
Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.
Entisols
Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.
Inceptisols
Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.
Vertisols
High-clay soils that shrink and swell dramatically. Fertile but challenging for foundations and septic systems.
Alfisols
Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

What This Means

Building & Foundations

About 48% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 88% 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.

Look Up a Specific Address

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