Las Vegas Valley Area, Nevada, Part of Clark County
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 Las Vegas Valley Area, Nevada, Part of Clark County.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Cave gravelly fine sandy loam, 0 to 4 percent slopes | 47K | Well drained | D | Very limited | Very limited |
| Weiser-Wechech association | 21K | Well drained | A | Very limited | Somewhat limited |
| Las Vegas-DeStazo complex, 0 to 2 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Weiser extremely gravelly fine sandy loam, 2 to 8 percent slopes | 19K | Well drained | A | Very limited | Somewhat limited |
| McCarran fine sandy loam, 0 to 4 percent slopes | 18K | Well drained | A | Very limited | Very limited |
| Goodsprings gravelly fine sandy loam, 2 to 4 percent slopes | 17K | Well drained | D | Very limited | Very limited |
| Cave gravelly fine sandy loam, 4 to 15 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Glencarb silt loam | 15K | Well drained | C | Somewhat limited | Very limited |
| Las Vegas gravelly fine sandy loam, 0 to 2 percent slopes | 14K | Well drained | D | Very limited | Very limited |
| Boxspring-Zeheme-Rock outcrop complex, 15 to 50 to percent slopes MLRA 30 | 13K | Well drained | D | Very limited | Very limited |
| Rock outcrop-St. Thomas complex, 15 to 30 percent slopes | 12K | D | Not rated | Not rated | |
| Cave very stony sandy loam, 0 to 4 percent slopes | 11K | Well drained | D | Very limited | Very limited |
| Las Vegas-McCarran-Grapevine complex, 0 to 4 percent slopes | 10K | Well drained | D | Very limited | Very limited |
| Canutio-Cave gravelly fine sandy loams, 2 to 8 percent slopes | 9K | Well drained | A | Not limited | Not limited |
| Irongold-Weiser association | 9K | Well drained | D | Very limited | Very limited |
| Zeheme-Potosi-Rock outcrop association | 8K | Well drained | D | Very limited | Very limited |
| Jean gravelly loamy fine sand, 2 to 4 percent slopes | 8K | Excessively drained | A | Not limited | Very limited |
| Tencee very gravelly fine sandy loam, 2 to 8 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Jean complex, 2 to 4 percent slopes | 7K | Excessively drained | A | Not limited | Very limited |
| Sunrock-Haleburu-Rock outcrop association | 7K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 82% 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 78% 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.