Uncompahgre National Forest Area, Colorado, Parts of Mesa, Montrose, Ouray, and San Miguel Counties

Survey Area CO676 Colorado

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 Uncompahgre National Forest Area, Colorado, Parts of Mesa, Montrose, Ouray, and San Miguel Counties.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Kubler-Delson-Cerro families complex, 3 to 15 percent slopes 57K Well drainedCSomewhat limitedVery limited
Chilson-Delson, moderately deep-Beenom families complex, 1 to 20 percent slopes 44K Well drainedDVery limitedVery limited
Borolls-Boralfs-Rock outcrop complex, 40 to 150 percent slopes 39K Well drainedCVery limitedVery limited
Lamphier-Hapgood families complex, 5 to 20 percent slopes 38K Well drainedCSomewhat limitedVery limited
Ustorthents-Ustochrepts-Rock outcrop complex, 40 to 150 percent slopes 34K Well drainedBVery limitedVery limited
Ula-Agneston-Pendergrass families complex, 1 to 15 percent slopes 32K Well drainedCVery limitedVery limited
Hapgood-Lamphier families complex, 20 to 50 percent slopes 32K Well drainedBVery limitedVery limited
Delson-Kubler-Showalter families complex, 15 to 45 percent slopes 26K Well drainedCVery limitedVery limited
Delson, moderately deep-Sharrott families complex, 1 to 15 percent slopes 25K Well drainedDVery limitedVery limited
Hoosan-Lamphier-Leaps families complex, 3 to 30 percent slopes 23K Well drainedCVery limitedVery limited
Mirand-Callan families-Chilson variant complex, 3 to 20 percent slopes 23K Well drainedCSomewhat limitedVery limited
Gralic-Grenadier families complex, 15 to 50 percent slopes 23K Well drainedAVery limitedVery limited
Trampas-Delson, moderately deep families complex, 3 to 30 percent slopes 19K Well drainedCVery limitedVery limited
Supervisor-Cebone families complex, 1 to 15 percent slopes 16K Well drainedBVery limitedVery limited
Overgaard-Olathe families complex, 3 to 20 percent slopes 14K Well drainedCVery limitedVery limited
Belain-Falcon families complex, 1 to 15 percent slopes 13K Well drainedCSomewhat limitedVery limited
Rock outcrop-Calicott-Brussett complex, moist, 25 to 65 percent slopes, extremely stony 13K DNot ratedNot rated
Zyme-Bodot-Rock outcrop complex, 25 to 65 percent slopes, very stony 10K Well drainedDVery limitedVery limited
Durango-Arabrab families complex, 3 to 15 percent slopes 9K Well drainedCSomewhat limitedVery limited
Jodero-Empedrado families complex, 2 to 20 percent slopes 8K Well drainedCVery limitedVery limited

What This Means

Building & Foundations

About 69% 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 97% 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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