Logan County, Illinois

Survey Area IL107 Illinois

The dominant drainage class is Poorly drained and the dominant hydrologic group is B/D (varies with drainage). 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 Logan County, Illinois.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Sable silty clay loam, 0 to 2 percent slopes 79K Poorly drainedB/DVery limitedVery limited
Ipava silt loam, 0 to 2 percent slopes 78K Somewhat poorly drainedC/DVery limitedVery limited
Osco silt loam, 2 to 5 percent slopes 17K Well drainedBSomewhat limitedSomewhat limited
Sawmill silty clay loam, 0 to 2 percent slopes, frequently flooded 15K Poorly drainedB/DVery limitedVery limited
Plano silt loam, 0 to 2 percent slopes 10K Well drainedBSomewhat limitedVery limited
Tama silt loam, very deep to sand, 2 to 5 percent slopes 9K Well drainedBSomewhat limitedVery limited
Hartsburg silty clay loam, 0 to 2 percent slopes 9K Poorly drainedB/DVery limitedVery limited
Buckhart silt loam, 0 to 2 percent slopes 9K Moderately well drainedCSomewhat limitedVery limited
Buckhart silt loam, 2 to 5 percent slopes 8K Moderately well drainedCSomewhat limitedVery limited
Knight silt loam, 0 to 2 percent slopes 6K Poorly drainedC/DVery limitedVery limited
Plano silt loam, sandy substratum, 2 to 5 percent slopes 6K Well drainedBSomewhat limitedVery limited
Tama silt loam, 2 to 5 percent slopes 6K Well drainedBSomewhat limitedSomewhat limited
Rozetta silt loam, 2 to 5 percent slopes 6K Well drainedBSomewhat limitedSomewhat limited
Broadwell silt loam, 2 to 5 percent slopes 6K Well drainedBSomewhat limitedVery limited
Tama silt loam, very deep to sand, 0 to 2 percent slopes 5K Well drainedBSomewhat limitedVery limited
Elburn silt loam, 0 to 2 percent slopes 5K Somewhat poorly drainedB/DVery limitedVery limited
Keomah silt loam, 0 to 2 percent slopes 5K Somewhat poorly drainedC/DVery limitedVery limited
Lawson silt loam, cool mesic, 0 to 2 percent slopes, frequently flooded 5K Somewhat poorly drainedB/DVery limitedVery limited
Drummer silty clay loam, 0 to 2 percent slopes 4K Poorly drainedB/DVery limitedVery limited
Tice silty clay loam, sandy substratum, 0 to 2 percent slopes, frequently flooded 4K Somewhat poorly drainedB/DVery limitedVery limited

What This Means

Building & Foundations

About 72% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 90% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.

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