Ralls County, Missouri

Survey Area MO173 Missouri

The dominant drainage class is Poorly drained and the dominant hydrologic group is D (very slow infiltration, high 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 Ralls County, Missouri.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Mexico silt loam, 1 to 4 percent slopes, eroded 43K Poorly drainedDVery limitedVery limited
Goss very gravelly silt loam, 14 to 45 percent slopes 42K Well drainedCVery limitedVery limited
Putnam silt loam, 0 to 1 percent slopes 30K Poorly drainedDVery limitedVery limited
Leonard silt loam, 1 to 6 percent slopes, eroded 20K Poorly drainedC/DVery limitedVery limited
Winfield silt loam, 5 to 10 percent slopes, eroded 19K Moderately well drainedCSomewhat limitedVery limited
Mexico silt loam, 0 to 2 percent slopes 18K Poorly drainedDVery limitedVery limited
Winfield silt loam, 9 to 14 percent slopes, eroded 14K Moderately well drainedCSomewhat limitedVery limited
Armstrong loam, 9 to 14 percent slopes, eroded 13K Somewhat poorly drainedDVery limitedVery limited
Armstrong loam, 5 to 9 percent slopes, eroded 12K Somewhat poorly drainedDVery limitedVery limited
Fatima silt loam, 0 to 2 percent slopes, frequently flooded 10K Moderately well drainedCVery limitedVery limited
Gorin silt loam, 5 to 9 percent slopes, eroded 8K Somewhat poorly drainedCVery limitedVery limited
Water 8K SubaqueousNot ratedNot rated
Belknap silt loam, 0 to 2 percent slopes, occasionally flooded 7K Somewhat poorly drainedCVery limitedVery limited
Smileyville silt loam, 2 to 6 percent slopes 6K Poorly drainedC/DVery limitedVery limited
Menfro silt loam, 14 to 20 percent slopes, eroded 5K Well drainedCVery limitedVery limited
Moniteau silt loam, 0 to 2 percent slopes, occasionally flooded 4K Poorly drainedC/DVery limitedVery limited
Menfro silt loam, 9 to 14 percent slopes, eroded 4K Well drainedBSomewhat limitedSomewhat limited
Weller silt loam, 2 to 5 percent slopes 4K Moderately well drainedDVery limitedVery limited
Landes fine sandy loam, 0 to 2 percent slopes, occasionally flooded 4K Moderately well drainedBVery limitedVery limited
Menfro silt loam, 5 to 9 percent slopes, eroded 4K Well drainedCSomewhat limitedVery limited

What This Means

Building & Foundations

About 82% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 95% 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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