Little Colorado River Area, Arizona, Parts of Coconino and Navajo Counties

Survey Area AZ707 Arizona

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 Little Colorado River Area, Arizona, Parts of Coconino and Navajo Counties.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Claysprings-Huerfano-Tuba complex, 2 to 15 percent slopes 208K Well drainedDVery limitedVery limited
Sheppard-Monue complex, 1 to 8 percent slopes 175K Excessively drainedANot limitedNot limited
Moffat-Monue complex, 1 to 6 percent slopes 135K Somewhat excessively drainedBNot limitedNot limited
Epikom-Leupp complex, 2 to 15 percent slopes 119K Well drainedDVery limitedVery limited
Meriwhitica-Wayneco-Tassi family, complex, 5 to 30 percent slopes 115K Well drainedDVery limitedVery limited
Sheppard-Rock outcrop-Sheppard, moderately deep complex, 2 to 15 percent slopes 101K Excessively drainedASomewhat limitedVery limited
Jocity-Joraibi-Navajo-Riverwash complex , 0 to 2 percent slopes 90K Well drainedCVery limitedVery limited
Hajisho-Seeg complex, 2 to 15 percent slopes 81K Well drainedDVery limitedVery limited
Shorthair-Moenkopie complex, 2 to 15 percent slopes 78K Well drainedDVery limitedVery limited
Leupp-Hoskinnini complex, 2 to 15 percent slopes 77K Well drainedDVery limitedVery limited
Navajo-Jocity complex, 1 to 3 percent slopes 76K Well drainedCVery limitedVery limited
Shinume-Leupp-Rock outcrop complex, 4 to 35 percent slopes 69K Excessively drainedDVery limitedVery limited
Hajisho-Seeg complex, 15 to 35 percent slopes 66K Somewhat excessively drainedDVery limitedVery limited
Hajisho-Cataract family-Shinume complex, 4 to 15 percent slopes 65K Well drainedDVery limitedVery limited
Tassi gravelly loamy very fine sand, 0 to 3 percent slopes 64K Well drainedDSomewhat limitedVery limited
Shorthair-Rock outcrop-Sheppard complex, 2 to 15 percent slopes 62K DNot ratedVery limited
Persayo-Hanksville complex, 4 to 60 percent slopes 60K Well drainedDVery limitedVery limited
Mellenthin-Placitas-Mellenthin, extremely stony, complex, 4 to 35 percent slopes 59K Well drainedDVery limitedVery limited
Arches-Rock outcrop-Mido complex, 2 to 15 percent slopes 56K Excessively drainedDVery limitedVery limited
Sheppard-Moenkopie-Needle complex, 2 to 35 percent slopes 48K Excessively drainedDVery limitedVery limited

What This Means

Building & Foundations

About 70% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 82% 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.

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