Lawrence County, South Dakota
The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). 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 Lawrence County, South Dakota.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Stovho-Trebor complex, 10 to 40 percent slopes | 40K | Well drained | C | Very limited | Very limited |
| Vanocker-Citadel complex, 10 to 40 percent slopes | 36K | Well drained | B | Very limited | Very limited |
| Pactola-Virkula-Rock outcrop complex, 10 to 40 percent slopes | 34K | Well drained | B | Very limited | Very limited |
| Vanocker-Sawdust, moist-Rock outcrop complex, 40 to 80 percent slopes | 24K | Well drained | B | Very limited | Very limited |
| Citadel-Tollflat-Danjay complex, 10 to 40 percent slopes | 15K | Well drained | C | Very limited | Very limited |
| Pactola-Pactola, shallow-Rock outcrop complex, 40 to 80 percent slopes | 13K | Well drained | B | Very limited | Very limited |
| Virkula-Pactola complex, 2 to 15 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
| Riflepit-Trebor complex, 10 to 40 percent slopes | 12K | Well drained | C | Very limited | Very limited |
| Trebor-Rock outcrop complex, 40 to 80 percent slopes | 11K | Well drained | C | Very limited | Very limited |
| Grizzly-Mineshaft complex, 40 to 80 percent slopes | 11K | Well drained | B | Very limited | Very limited |
| Citadel-Vanocker complex, 2 to 12 percent slopes | 11K | Well drained | C | Somewhat limited | Very limited |
| Vanocker-Danjay-Hopdraw, moist complex, 40 to 80 percent slopes | 10K | Well drained | A | Very limited | Very limited |
| Grizzly-Mineshaft complex, 10 to 40 percent slopes | 10K | Well drained | B | Very limited | Very limited |
| Buska-Rock outcrop complex, 10 to 40 percent slopes | 9K | Well drained | B | Very limited | Very limited |
| Stovho-Riflepit-Trebor complex, 2 to 12 percent slopes | 9K | Well drained | C | Somewhat limited | Very limited |
| Snomo-Rock outcrop complex, 6 to 25 percent slopes | 8K | Well drained | D | Very limited | Very limited |
| Riflepit-Stovho complex, 2 to 12 percent slopes | 8K | Well drained | C | Somewhat limited | Very limited |
| Vanocker-Citadel complex, 20 to 60 percent slopes | 7K | Well drained | B | Very limited | Very limited |
| Vale silt loam, 2 to 6 percent slopes | 6K | Well drained | C | Somewhat limited | Somewhat limited |
| Pierre-Fairburn-Ucross complex, moist, 6 to 25 percent slopes | 6K | Well drained | C | Very limited | Very limited |
What This Means
Building & Foundations
About 84% 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 97% 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.