Edwards Air Force Base, California, Parts of Kern, Los Angeles, and San Bernardino Counties
The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low 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 Edwards Air Force Base, California, Parts of Kern, Los Angeles, and San Bernardino Counties.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Wherry clay, 0 to 1 percent slopes | 47K | Not rated | Not rated | ||
| Cajon loamy fine sand, 2 to 9 percent slopes | 30K | Somewhat excessively drained | A | Very limited | Very limited |
| Hi Vista-Machone-Randsburg complex, 2 to 15 percent slopes | 23K | Well drained | B | Very limited | Very limited |
| Leuhman complex, 0 to 2 percent slopes | 16K | Moderately well drained | D | Very limited | Very limited |
| Leuhman-Challenger complex, 0 to 9 percent slopes | 16K | Moderately well drained | D | Very limited | Very limited |
| Cajon-Machone complex, 2 to 9 percent slopes | 14K | Somewhat excessively drained | A | Very limited | Very limited |
| Helendale loamy sand, 2 to 5 percent slopes | 14K | Well drained | A | Very limited | Somewhat limited |
| Lavic-Norob complex, 2 to 9 percent slopes | 9K | Moderately well drained | B | Not limited | Somewhat limited |
| Cajon-Norob complex, 2 to 9 percent slopes | 9K | Somewhat excessively drained | A | Very limited | Very limited |
| Machone-Randsburg-Hi Vista complex, 2 to 50 percent slope | 8K | Well drained | B | Very limited | Very limited |
| Helendale-Cajon complex, 2 to 9 percent slopes | 8K | Well drained | A | Very limited | Somewhat limited |
| Helendale-Sparkhule complex, 2 to 15 percent slopes | 8K | Well drained | A | Very limited | Somewhat limited |
| Norob complex, 0 to 5 percent slopes, overblown | 8K | Moderately well drained | C | Very limited | Very limited |
| Randsburg-Rock outcrop complex, 15 to 50 percent slopes | 7K | Well drained | D | Very limited | Very limited |
| Voyager-leuhman complex, 0 to 2 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Helendale loamy sand, 0 to 2 percent slopes | 6K | Well drained | A | Very limited | Somewhat limited |
| Leuhman-Cajon-Leuhman, eroded, complex, 0 to 9 percent slopes | 6K | Moderately well drained | D | Very limited | Very limited |
| Muroc-Randsburg complex, 5 to 15 percent slopes | 5K | Well drained | D | Very limited | Very limited |
| Leuhman-Challenger-Cajon complex, 0 to 15 percent slopes | 5K | Moderately well drained | A | Very limited | Very limited |
| Cajon-Norob complex, 0 to 5 percent slopes | 5K | Somewhat excessively drained | A | Very limited | Very limited |
What This Means
Building & Foundations
About 77% 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 63% 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.