Benton County, Iowa

Survey Area IA011 Iowa

The dominant drainage class is Moderately 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 Benton County, Iowa.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Dinsdale silty clay loam, 2 to 5 percent slopes 80K Moderately well drainedCSomewhat limitedVery limited
Colo-Ely complex, 0 to 5 percent slopes 63K Poorly drainedC/DVery limitedVery limited
Colo silty clay loam, 0 to 2 percent slopes, occasionally flooded 34K Poorly drainedC/DVery limitedVery limited
Dinsdale silty clay loam, 5 to 9 percent slopes 31K Moderately well drainedCSomewhat limitedVery limited
Tama silty clay loam, 2 to 5 percent slopes 25K Well drainedCSomewhat limitedVery limited
Kenyon loam, 5 to 9 percent slopes, eroded 15K Moderately well drainedCSomewhat limitedVery limited
Clyde-Floyd complex, 1 to 4 percent slopes 11K Poorly drainedC/DVery limitedVery limited
Kenyon loam, 2 to 5 percent slopes 11K Moderately well drainedCSomewhat limitedVery limited
Dinsdale silty clay loam, 5 to 9 percent slopes, eroded 9K Moderately well drainedCSomewhat limitedVery limited
Kenyon loam, 5 to 9 percent slopes 9K Moderately well drainedCSomewhat limitedVery limited
Muscatine silty clay loam, 2 to 5 percent slopes 8K Somewhat poorly drainedC/DVery limitedVery limited
Muscatine silty clay loam, 0 to 2 percent slopes 8K Somewhat poorly drainedC/DVery limitedVery limited
Fluvaquents, sandy and loamy 8K Very poorly drainedB/DVery limitedVery limited
Ely silty clay loam, 2 to 5 percent slopes 6K Somewhat poorly drainedC/DVery limitedVery limited
Nevin silty clay loam, sandy substratum, 0 to 2 percent slopes 4K Somewhat poorly drainedC/DVery limitedVery limited
Chelsea-Fayette-Lamont complex, 9 to 18 percent slopes 3K Well drainedASomewhat limitedVery limited
Tama silty clay loam, terrace, 0 to 2 percent slopes 3K Well drainedCSomewhat limitedVery limited
Dickinson fine sandy loam, 2 to 5 percent slopes 3K Well drainedANot limitedVery limited
Spillville loam, 0 to 2 percent slopes, occasionally flooded 3K Somewhat poorly drainedB/DVery limitedVery limited
Muscatine silty clay loam, terrace, 0 to 2 percent slopes 3K Somewhat poorly drainedC/DVery limitedVery limited

What This Means

Building & Foundations

About 43% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.

Septic Systems

About 100% 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

Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.

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