Johnson County Area, Wyoming, Northern Part
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 Johnson County Area, Wyoming, Northern Part.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Samday-Shingle-Badland complex, 10 to 45 percent slopes | 165K | Well drained | D | Very limited | Very limited |
| Theedle-Kishona-Shingle loams, 3 to 30 percent slopes | 130K | Well drained | C | Very limited | Very limited |
| Theedle-Shingle loams, 3 to 30 percent slopes | 125K | Well drained | C | Very limited | Very limited |
| Shingle-Wibaux complex, 0 to 60 percent slopes | 41K | Well drained | D | Very limited | Very limited |
| Forkwood-Cushman loams, 6 to 15 percent slopes | 38K | Well drained | B | Somewhat limited | Somewhat limited |
| Theedle-Kishona loams, 6 to 20 percent slopes | 32K | Well drained | C | Somewhat limited | Very limited |
| Cambria-Kishona loams, 0 to 6 percent slopes | 29K | Well drained | B | Somewhat limited | Somewhat limited |
| Cambria-Kishona loams, 6 to 15 percent slopes | 29K | Well drained | B | Somewhat limited | Somewhat limited |
| Savageton-Samday clay loams, 3 to 15 percent slopes | 23K | Well drained | D | Very limited | Very limited |
| Skelridge, very stony-Delridge-Yamacall complex, 10 to 50 percent slopes | 21K | Well drained | B | Very limited | Very limited |
| Vonalee-Terro-Taluce fine sandy loams, 3 to 30 percent slopes | 18K | Well drained | A | Somewhat limited | Very limited |
| Cloud Peak-Dullknife complex, 10 to 70 percent slopes | 17K | Well drained | C | Very limited | Very limited |
| Clarkelen-Haverdad complex, 0 to 3 percent slopes, rarely flooded | 13K | Well drained | B | Very limited | Somewhat limited |
| Rock outcrop-Cloud Peak association, 10 to 70 percent slopes | 12K | D | Not rated | Not rated | |
| Leavitt-Passcreek loams, 2 to 30 percent slopes | 12K | Well drained | C | Very limited | Very limited |
| Renohill-Savageton clay loams, 3 to 15 percent slopes | 12K | Well drained | D | Somewhat limited | Very limited |
| Lucky-Burgess-Hazton association, 2 to 30 percent slopes | 11K | Well drained | C | Very limited | Very limited |
| Forkwood-Ulm loams, 0 to 6 percent slopes | 11K | Well drained | B | Somewhat limited | Somewhat limited |
| Fairburn-Ironbutte-Rock outcrop complex, 0 to 60 percent slopes | 11K | Well drained | D | Very limited | Very limited |
| Wibaux-Shingle-Taluce complex, 6 to 40 percent slopes | 11K | Well drained | D | Very limited | Very limited |
What This Means
Building & Foundations
About 76% 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 82% 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.