Graham County, Arizona, Southwestern 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 Graham County, Arizona, Southwestern Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Sasabe sandy loam, 1 to 8 percent slopes | 51K | Well drained | C | Very limited | Very limited |
| Beaumain-Cherrycow-Rock outcrop complex, 5 to 60 percent slopes | 44K | Well drained | D | Very limited | Very limited |
| Eloma-Tombstone-White House complex, 3 to 50 percent slopes | 36K | Well drained | C | Very limited | Very limited |
| Eloma-Kimrose-Saddlebrook complex, 1 to 60 percent slopes | 27K | Well drained | C | Very limited | Very limited |
| Contention family-Whitecliff family-Sasabe complex, 5 to 60 percent slopes | 23K | Well drained | D | Very limited | Very limited |
| Mallet-Hooks complex, 1 to 8 percent slopes | 23K | Well drained | A | Not limited | Not limited |
| Cloverdale cobbly clay loam, 1 to 5 percent slopes | 21K | Well drained | D | Very limited | Very limited |
| Eloma-Eskiminzin-Cammerman-Holguin complex, 5 to 60 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Sasabe-Bonita-Forrest complex, 0 to 3 percent slopes | 16K | Well drained | C | Very limited | Very limited |
| White House-Eskiminzin-Pedregosa complex, 5 to 60 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Pantak-Leyte-Rock outcrop complex, 5 to 45 percent slopes | 13K | Well drained | D | Very limited | Very limited |
| Rock outcrop-Budlamp-Magoffin complex, 5 to 70 percent slopes | 12K | Somewhat excessively drained | D | Very limited | Very limited |
| Delnorte-Nahda complex, 5 to 45 percent slopes | 10K | Well drained | D | Very limited | Very limited |
| Brewster-Aravaipa-Rock outcrop complex, 3 to 60 percent slopes | 10K | Well drained | D | Very limited | Very limited |
| Ubik-Riveroad complex, 0 to 5 percent slopes | 9K | Well drained | B | Very limited | Very limited |
| Deloro-Schrap-Rock outcrop complex, 5 to 60 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Beaumain-Rock outcrop-Cherrycow complex, 5 to 60 percent slopes MLRA 38 | 8K | Well drained | D | Very limited | Very limited |
| Graham-Paramore-Rock outcrop complex, 5 to 50 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Graham-Lampshire-Rock outcrop complex, 5 to 60 percent slopes | 6K | Well drained | D | Very limited | Very limited |
| Ustifluventic Haplocambids, 0 to 3 percent slopes | 6K | Well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 93% 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 93% 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.