San Juan Area, Utah

Survey Area UT639 Utah

The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 San Juan Area, Utah.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Montvale very rocky very fine sandy loam, 2 to 25 percent slopes 76K Well drainedDVery limitedVery limited
Northdale loam, low rainfall, 0 to 6 percent slopes 49K Well drainedCSomewhat limitedVery limited
Monticello very fine sandy loam, 0 to 10 percent slopes 45K Well drainedBNot limitedSomewhat limited
Northdale loam, 0 to 6 percent slopes 38K Well drainedCSomewhat limitedVery limited
Sandstone rockland, steep 29K Not ratedNot rated
Monticello very fine sandy loam, low rainfall, 2 to 10 percent slopes 16K Well drainedBNot limitedSomewhat limited
Lockerby and Hovenweep soils, 2 to 6 percent slopes 15K Moderately well drainedDVery limitedVery limited
Menefee clay loam, 2 to 25 percent slopes 14K Well drainedDVery limitedVery limited
Ucolo silty clay loam, 2 to 10 percent slopes, moderately eroded 7K Moderately well drainedCVery limitedVery limited
Blanding very fine sandy loam, 2 to 10 percent slopes 7K Well drainedBNot limitedSomewhat limited
Abajo loam, 0 to 10 percent slopes 7K Well drainedCSomewhat limitedVery limited
Mellenthin very rocky fine sandy loam, 4 to 25 percent slopes 5K Well drainedDVery limitedVery limited
Ackmen silt loam, 0 to 6 percent slopes, moderately eroded 5K Well drainedBNot limitedSomewhat limited
Abajo cobbly loam, 2 to 25 percent slopes 4K Well drainedCSomewhat limitedVery limited
Scorup very fine sandy loam, 2 to 6 percent slopes 4K Well drainedCNot limitedVery limited
Scorup cobbly very fine sandy loam, 2 to 25 percent slopes 4K Well drainedCSomewhat limitedVery limited
Hovenweep loam, 2 to 6 percent slopes 3K Well drainedCSomewhat limitedVery limited
Menefee cobbly clay loam, 4 to 40 percent slopes 3K Well drainedDVery limitedVery limited
Northdale loam, 6 to 10 percent slopes 2K Well drainedCSomewhat limitedVery limited
Monticello-Hovenweep complex, low rainfall, 2 to 10 percent slopes 2K Well drainedBNot limitedSomewhat limited

What This Means

Building & Foundations

About 36% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 69% 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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