Arches National Park, Utah

Survey Area UT687 Utah

The dominant drainage class is Excessively 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 Arches National Park, Utah.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Rock outcrop-Arches complex, 2 to 15 percent slopes 10K DNot ratedNot rated
Rock outcrop-Mident family-Mido complex, 15 to 30 percent slopes 9K DNot ratedNot rated
Arches-Rock outcrop complex, Entrada Formation, 2 to 15 percent slopes 8K Excessively drainedDVery limitedVery limited
Mido-Mido, strongly calcareous complex, 2 to 30 percent slopes 6K Excessively drainedAVery limitedVery limited
Rizno-Arches-Mido complex, 2 to 15 percent slopes, very rocky 6K Well drainedDVery limitedVery limited
Rock outcrop-Arches-Pensom, moderately deep complex, 2 to 15 percent slopes 6K DNot ratedNot rated
Milok-Mido, strongly calcareous complex, 2 to 15 percent slopes 5K Well drainedANot limitedNot limited
Crosscan family-Rock outcrop complex, 5 to 30 percent slopes 5K Well drainedDVery limitedVery limited
Arches-Rizno-Rock outcrop complex, 2 to 15 percent slopes 5K Excessively drainedDVery limitedVery limited
Mido, strongly calcareous-Mido complex, 2 to 15 percent slopes 5K Excessively drainedANot limitedVery limited
Arches-Rock outcrop complex, 2 to 15 percent slopes 3K Excessively drainedDVery limitedVery limited
Bowington-Radnik-Patterfield complex, 0 to 6 percent slopes 3K Moderately well drainedAVery limitedVery limited
Chedeski family, 15 to 60 percent slopes 2K Well drainedDVery limitedVery limited
Remorris loam, 5 to 45 percent slopes 2K Well drainedDVery limitedVery limited
Reef-Rock outcrop complex, 5 to 30 percent slopes 1K DNot ratedNot rated
Begay fine sandy loam, 0 to 2 percent slopes, overwash 1K Well drainedANot limitedNot limited
Persayo-Somorent family complex, 15 to 70 percent slopes 1K Well drainedDVery limitedVery limited
Rock outcrop-Moclom-Simel complex, 2 to 30 percent slopes 1K DVery limitedVery limited
Livan family, 0 to 6 percent slopes 776 Excessively drainedAVery limitedVery limited
Retsabal very fine sandy loam, 2 to 15 percent slopes 571 Well drainedDVery limitedVery limited

What This Means

Building & Foundations

About 54% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas, sandy or gravelly soils with low bearing capacity. A geotechnical assessment is recommended before building.

Septic Systems

About 59% of soils are rated "very limited" for septic absorption fields. The well-drained soils may actually drain too fast for standard leach fields, allowing effluent to reach groundwater. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Soils tend to drain very quickly, meaning nutrients and water don't stick around long. Raised beds with amended soil, drip irrigation, and heavy mulching will give the best results. Compost is your best friend here — it improves water retention dramatically.

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