Edwards Air Force Base, California, Parts of Kern, Los Angeles, and San Bernardino Counties

Survey Area CA669 California

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 UnitAcresDrainageHydro GroupDwellingsSeptic
Wherry clay, 0 to 1 percent slopes 47K Not ratedNot rated
Cajon loamy fine sand, 2 to 9 percent slopes 30K Somewhat excessively drainedAVery limitedVery limited
Hi Vista-Machone-Randsburg complex, 2 to 15 percent slopes 23K Well drainedBVery limitedVery limited
Leuhman complex, 0 to 2 percent slopes 16K Moderately well drainedDVery limitedVery limited
Leuhman-Challenger complex, 0 to 9 percent slopes 16K Moderately well drainedDVery limitedVery limited
Cajon-Machone complex, 2 to 9 percent slopes 14K Somewhat excessively drainedAVery limitedVery limited
Helendale loamy sand, 2 to 5 percent slopes 14K Well drainedAVery limitedSomewhat limited
Lavic-Norob complex, 2 to 9 percent slopes 9K Moderately well drainedBNot limitedSomewhat limited
Cajon-Norob complex, 2 to 9 percent slopes 9K Somewhat excessively drainedAVery limitedVery limited
Machone-Randsburg-Hi Vista complex, 2 to 50 percent slope 8K Well drainedBVery limitedVery limited
Helendale-Cajon complex, 2 to 9 percent slopes 8K Well drainedAVery limitedSomewhat limited
Helendale-Sparkhule complex, 2 to 15 percent slopes 8K Well drainedAVery limitedSomewhat limited
Norob complex, 0 to 5 percent slopes, overblown 8K Moderately well drainedCVery limitedVery limited
Randsburg-Rock outcrop complex, 15 to 50 percent slopes 7K Well drainedDVery limitedVery limited
Voyager-leuhman complex, 0 to 2 percent slopes 6K Well drainedCVery limitedVery limited
Helendale loamy sand, 0 to 2 percent slopes 6K Well drainedAVery limitedSomewhat limited
Leuhman-Cajon-Leuhman, eroded, complex, 0 to 9 percent slopes 6K Moderately well drainedDVery limitedVery limited
Muroc-Randsburg complex, 5 to 15 percent slopes 5K Well drainedDVery limitedVery limited
Leuhman-Challenger-Cajon complex, 0 to 15 percent slopes 5K Moderately well drainedAVery limitedVery limited
Cajon-Norob complex, 0 to 5 percent slopes 5K Somewhat excessively drainedAVery limitedVery 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.

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