Laramie County, Wyoming, Western Part
The most common soil here is Evanston, on about 17% of the land: a loam, a balanced mix that crumbles in your hand. Ascalon and Trimad come next.
About 94% of the land drains well, and 2% stays wet for long stretches; groundwater comes within two feet of the surface under 2% of it.
USDA rates 52% 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: 2% of the land floods occasionally or more, and bedrock lies within 40 inches under 31% 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 Laramie County, Wyoming, Western Part, 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 B (moderate infiltration). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 Laramie County, Wyoming, Western Part. 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 |
|---|---|---|---|---|---|
| Evanston loam, 0 to 6 percent slopes | 124K | Well drained | B | Not limited | Somewhat limited |
| Ipson-Evanston complex, 6 to 30 percent slopes | 103K | Well drained | B | Very limited | Very limited |
| Ascalon loam, cool, 0 to 6 percent slopes | 91K | Well drained | B | Not limited | Somewhat limited |
| Poposhia-Trimad complex, 3 to 15 percent slopes | 53K | Well drained | B | Not limited | Somewhat limited |
| Blazon-Trimad complex, 15 to 45 percent slopes | 33K | Well drained | D | Very limited | Very limited |
| Weed loam, 0 to 6 percent slopes | 32K | Well drained | B | Somewhat limited | Somewhat limited |
| Treon-Aberone fine sandy loams, 6 to 30 percent slopes | 27K | Well drained | D | Very limited | Very limited |
| Albinas loam, 0 to 6 percent slopes | 25K | Well drained | B | Not limited | Somewhat limited |
| Trimad-Weed-Blazon association, 0 to 15 percent slopes | 20K | Well drained | B | Somewhat limited | Very limited |
| Trimad-Blazon, thin solum-Rock outcrop complex, 20 to 45 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Altvan loam, 0 to 6 percent slopes | 18K | Well drained | B | Not limited | Somewhat limited |
| Altvan-Dix complex, 6 to 10 percent slopes | 18K | Well drained | C | Not limited | Very limited |
| Rock outcrop-Cathedral complex, 20 to 40 percent slopes | 18K | D | Very limited | Very limited | |
| Boyle-Boyle, thin solum, gravelly loams, 3 to 6 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Manter sandy loam, 0 to 6 percent slopes | 18K | Well drained | B | Not limited | Not limited |
| Evanston-Weed-Trimad loams, 3 to 15 percent slopes | 17K | Well drained | B | Somewhat limited | Somewhat limited |
| Trimad-Blazon complex, 15 to 45 percent slopes | 16K | Well drained | B | Very limited | Very limited |
| Poposhia silt loam, 0 to 6 percent slopes | 16K | Well drained | B | Not limited | Somewhat limited |
| Valent loamy fine sand, 0 to 6 percent slopes | 15K | Excessively drained | A | Not limited | Very limited |
| Boyle-Lininger-Boyle, thin solum, complex, 3 to 45 percent slopes | 14K | 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 52% 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.