Coconino County Area, Arizona, North Kaibab 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 Coconino County Area, Arizona, North Kaibab Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Arches-Pensom complex, 4 to 12 percent slopes | 144K | Well drained | D | Very limited | Very limited |
| Curhollow-Mellenthin complex, 2 to 12 percent slopes | 82K | Well drained | D | Very limited | Very limited |
| Torriorthents-Rock outcrop complex, 25 to 65 percent slopes | 45K | Well drained | D | Not rated | Not rated |
| Arches-Pensom complex, cool, 4 to 12 percent slopes | 31K | Well drained | D | Very limited | Very limited |
| Kinan-Pennell complex, 4 to 15 percent slopes | 31K | Well drained | A | Somewhat limited | Somewhat limited |
| Mellenthin very gravelly loam, 1 to 25 percent slopes | 28K | Well drained | D | Very limited | Very limited |
| Rock outcrop | 26K | D | Not rated | Not rated | |
| Yumtheska very gravelly loam, 4 to 30 percent slopes | 23K | Well drained | D | Very limited | Very limited |
| Aneth fine sand, 2 to 16 percent slopes | 22K | Somewhat excessively drained | A | Somewhat limited | Somewhat limited |
| Pensom fine sand, 2 to 16 percent slopes | 20K | Excessively drained | A | Somewhat limited | Very limited |
| Rock outcrop-Torriorthents complex, warm, 25 to 65 percent slopes | 19K | D | Not rated | Not rated | |
| Strych loam, 1 to 4 percent slopes | 15K | Well drained | B | Not limited | Somewhat limited |
| Mellenthin very gravelly loam, 30 to 60 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Pagina-Wahweap complex, 3 to 16 percent slopes | 14K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Monue-Seeg complex, 1 to 6 percent slopes | 14K | Well drained | A | Not limited | Very limited |
| Barx gravelly loam, 1 to 6 percent slopes | 13K | Well drained | B | Not limited | Somewhat limited |
| Curob very gravelly loam, 2 to 12 percent slopes | 13K | Well drained | D | Not limited | Very limited |
| Sheppard loamy fine sand, 5 to 15 percent slopes | 12K | Excessively drained | A | Somewhat limited | Very limited |
| Klondike sandy clay loam, 2 to 15 percent slopes MLRA 35 | 11K | Well drained | D | Very limited | Very limited |
| Jocity silty clay loam, 1 to 3 percent slopes | 11K | Well drained | C | Somewhat limited | Somewhat limited |
What This Means
Building & Foundations
About 56% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes. A geotechnical assessment is recommended before building.
Septic Systems
About 69% 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.