Clinton County, Iowa

Survey Area IA045 Iowa

The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate 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 Clinton County, Iowa.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Fayette silt loam, 5 to 9 percent slopes, moderately eroded 21K Well drainedCSomewhat limitedVery limited
Fayette silt loam, 9 to 14 percent slopes, moderately eroded 19K Well drainedCSomewhat limitedVery limited
Tama silt loam, driftless, 2 to 6 percent slopes 17K Well drainedCSomewhat limitedVery limited
Fayette silty clay loam, 18 to 25 percent slopes, severely eroded 16K Well drainedCVery limitedVery limited
Fayette silty clay loam, 14 to 18 percent slopes, severely eroded 14K Well drainedCVery limitedVery limited
Fluvents-Ambraw complex, 0 to 2 percent slopes 14K Poorly drainedBVery limitedVery limited
Downs silt loam, 5 to 9 percent slopes, moderately eroded 14K Well drainedCSomewhat limitedVery limited
Fayette silty clay loam, 9 to 14 percent slopes, severely eroded 14K Well drainedCSomewhat limitedVery limited
Arenzville-Chaseburg complex, 1 to 5 percent slopes 13K Moderately well drainedBVery limitedVery limited
Colo-Ely complex, 0 to 5 percent slopes 13K Poorly drainedC/DVery limitedVery limited
Colo silty clay loam, 0 to 2 percent slopes, occasionally flooded 11K Poorly drainedC/DVery limitedVery limited
Chaseburg silt loam, moderately well drained, 0 to 2 percent slopes 11K Moderately well drainedBVery limitedVery limited
Water 10K Not ratedNot rated
Downs silt loam, 9 to 14 percent slopes, moderately eroded 10K Well drainedCSomewhat limitedVery limited
Atterberry silt loam, sandy substratum, 0 to 2 percent slopes 9K Somewhat poorly drainedC/DVery limitedVery limited
Sawmill silty clay loam, shallow loess, 0 to 2 percent slopes, occasionally flooded 9K Poorly drainedC/DVery limitedVery limited
Dinsdale silt loam, 2 to 5 percent slopes 9K Moderately well drainedCSomewhat limitedVery limited
Marshan clay loam, 0 to 2 percent slopes, rarely flooded 9K Poorly drainedC/DVery limitedVery limited
Klinger silt loam, 1 to 4 percent slopes 8K Somewhat poorly drainedC/DVery limitedVery limited
Tama silt loam, driftless, 5 to 9 percent slopes 8K Well drainedCSomewhat limitedVery limited

What This Means

Building & Foundations

About 51% 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. 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.

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