Grand County, Utah - Central Part
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 Grand County, Utah - Central Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Reva-Falcon families-Rock outcrop complex | 99K | Well drained | D | Very limited | Very limited |
| Chipeta complex | 95K | Well drained | D | Very limited | Very limited |
| Rizno-Rock outcrop complex | 80K | Well drained | D | Very limited | Very limited |
| Toddler-Ravola-Glenton families association | 78K | Well drained | C | Very limited | Somewhat limited |
| Dast family, 50 to 80 percent slopes | 78K | Well drained | C | Very limited | Very limited |
| Thedalund family, moist | 63K | Well drained | D | Very limited | Very limited |
| Hanksville family-Badland complex | 56K | Not rated | Not rated | ||
| Sula-Razorba families complex | 55K | Well drained | C | Very limited | Very limited |
| Moenkopie-Rock outcrop complex | 49K | Well drained | D | Very limited | Very limited |
| Myton family-Rock outcrop complex | 45K | B | Not rated | Not rated | |
| Shalako sandy loam, 3 to 30 percent slopes | 45K | Well drained | D | Very limited | Very limited |
| Rock outcrop-Arches-Mido complex | 44K | Well drained | D | Very limited | Very limited |
| Thedalund family, stony | 37K | Well drained | D | Very limited | Very limited |
| Killpack-Chipeta complex | 32K | Well drained | D | Very limited | Very limited |
| Begay-Sazi complex | 32K | Well drained | A | Not limited | Not limited |
| Chipeta-Badland complex | 30K | Not rated | Not rated | ||
| Mesa-Chipeta-Thedalund family complex | 29K | Well drained | D | Very limited | Very limited |
| Rock outcrop | 28K | D | Not rated | Not rated | |
| Rock outcrop-Moenkopie association | 24K | D | Not rated | Not rated | |
| Killpack-Blueflat complex | 22K | Well drained | D | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 76% 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 71% 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.