Clark County Area, Nevada
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 Clark County Area, Nevada.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Water | 110K | D | Not rated | Not rated | |
| Seanna-Goldroad-Rock outcrop association | 101K | Well drained | D | Very limited | Very limited |
| Potosi-Zeheme-Rock outcrop association | 69K | Well drained | D | Very limited | Very limited |
| Sunrock-Haleburu-Rock outcrop association | 65K | Well drained | D | Very limited | Very limited |
| Buckspring-Fletcherpeak-Seralin association | 64K | Well drained | D | Very limited | Very limited |
| Purob-Irongold association | 62K | Well drained | D | Very limited | Very limited |
| Commski-Oldspan-Lastchance association | 61K | Well drained | A | Not limited | Not limited |
| Tonopah-Arizo association, 2 to 8 percent slopes | 60K | Excessively drained | A | Very limited | Very limited |
| Weiser-Wechech association | 54K | Well drained | A | Very limited | Somewhat limited |
| Boxspring-Potosi-Rock outcrop association | 54K | Well drained | D | Very limited | Very limited |
| Lanip-Kidwell association | 51K | Well drained | C | Very limited | Very limited |
| Zeheme-Rock outcrop association | 49K | Well drained | D | Very limited | Very limited |
| Irongold-Weiser association | 45K | Well drained | D | Very limited | Very limited |
| Huevi association | 42K | Well drained | A | Very limited | Very limited |
| Mountmcull-Nippeno association | 42K | Well drained | D | Very limited | Very limited |
| Goldroad-Rock outcrop association | 37K | Well drained | D | Very limited | Very limited |
| Arizo association | 37K | Excessively drained | A | Very limited | Very limited |
| Boxspring-Scrapy-Rock outcrop association | 34K | Well drained | D | Very limited | Very limited |
| Purob extremely gravelly loam, 8 to 30 percent slopes | 32K | Well drained | D | Very limited | Very limited |
| Threelakes-Weiser association | 31K | Well drained | A | Very limited | Somewhat limited |
What This Means
Building & Foundations
About 84% 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 76% 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.