Washakie County Area, Wyoming
The most common soil here is Persayo, on about 9% of the land: a silty clay loam, smooth and slightly sticky. Kishona and Youngston come next.
About 78% of the land drains well.
USDA rates 51% of the land very limited for a standard septic drain field, and 42% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 3% of the land floods occasionally or more, and bedrock lies within 40 inches under 70% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Washakie County Area, Wyoming, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). The most common soil order is Entisols — young soils with little profile development, often on floodplains or steep slopes. 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 Washakie County Area, Wyoming. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Persayo-Rock outcrop association | 200K | D | Not rated | Not rated | |
| Kishona-Shingle-Rock outcrop association | 109K | Well drained | D | Somewhat limited | Somewhat limited |
| Forkwood-Kishona association | 63K | Well drained | B | Not limited | Somewhat limited |
| Youngston-Uffens-Lostwells complex, 1 to 10 percent slopes | 60K | Well drained | C | Somewhat limited | Very limited |
| Kishona-Shingle association | 46K | Well drained | C | Very limited | Very limited |
| Rock outcrop-Persayo complex, 15 to 70 percent slopes | 44K | D | Not rated | Not rated | |
| Spearfish-Travessilla-Rock outcrop complex, 10 to 60 pe rcent slopes | 44K | Well drained | D | Very limited | Very limited |
| Muff-Neiber fine sandy loams, 3 to 30 percent slopes | 39K | Well drained | C | Very limited | Very limited |
| Wallson loamy fine sand, 1 to 10 percent slopes | 37K | Well drained | A | Not limited | Not limited |
| Neville-Spearfish-Rock outcrop association | 36K | Well drained | B | Not limited | Somewhat limited |
| Vale-Tensleep association | 34K | Well drained | B | Not limited | Somewhat limited |
| Fruita-Neiber association | 32K | Well drained | C | Very limited | Very limited |
| Uffens-Rairdent complex, 1 to 10 percent slopes | 31K | Well drained | C | Somewhat limited | Very limited |
| Forkwood-Haverdad association | 30K | Well drained | B | Not limited | Somewhat limited |
| Rekop-Gystrum association | 29K | Well drained | D | Very limited | Very limited |
| Clayburn-Bachus-Inchau association | 28K | Well drained | C | Very limited | Very limited |
| Rock outcrop-Starman complex, 6 to 45 percent slopes | 27K | D | Not rated | Not rated | |
| Greybull-Persayo association | 27K | Well drained | D | Very limited | Very limited |
| Hoot-Rock outcrop complex, 3 to 45 percent slopes | 25K | Well drained | D | Very limited | Very limited |
| Kyle-Shingle-Bidman association | 24K | Well drained | D | Very limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 42% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 51% 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.