Tama County, Iowa

Survey Area IA171 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 Tama County, Iowa.

Soil Map UnitAcresDrainageHydro GroupDwellingsSeptic
Tama silty clay loam, 2 to 5 percent slopes 56K Well drainedCSomewhat limitedVery limited
Colo-Ely complex, 0 to 5 percent slopes 32K Poorly drainedC/DVery limitedVery limited
Tama silty clay loam, 5 to 9 percent slopes, eroded 30K Well drainedCSomewhat limitedVery limited
Dinsdale silty clay loam, 5 to 9 percent slopes, eroded 28K Moderately well drainedCSomewhat limitedVery limited
Colo silty clay loam, 0 to 2 percent slopes, occasionally flooded 19K Poorly drainedC/DVery limitedVery limited
Muscatine silty clay loam, 0 to 2 percent slopes 15K Somewhat poorly drainedC/DVery limitedVery limited
Bremer silty clay loam, 0 to 2 percent slopes, occasionally flooded 14K Poorly drainedDVery limitedVery limited
Nevin silty clay loam, 0 to 2 percent slopes 13K Somewhat poorly drainedC/DVery limitedVery limited
Ackmore-Colo complex, 2 to 5 percent slopes 13K Somewhat poorly drainedC/DVery limitedVery limited
Dinsdale silty clay loam, 2 to 5 percent slopes 12K Moderately well drainedCSomewhat limitedVery limited
Colo silty clay loam, channeled, 0 to 2 percent slopes, frequently flooded 10K Poorly drainedC/DVery limitedVery limited
Fayette silt loam, till plain, 9 to 14 percent slopes, eroded 10K Well drainedCSomewhat limitedVery limited
Tama silty clay loam, 5 to 9 percent slopes 8K Well drainedCSomewhat limitedVery limited
Fayette silt loam, till plain, 18 to 25 percent slopes, eroded 8K Well drainedCVery limitedVery limited
Garwin silty clay loam, 0 to 2 percent slopes 8K Poorly drainedC/DVery limitedVery limited
Fayette silt loam, till plain, 14 to 18 percent slopes, eroded 8K Well drainedCVery limitedVery limited
Wiota silt loam, 0 to 2 percent slopes, rarely flooded 7K Moderately well drainedCVery limitedVery limited
Fayette silt loam, till plain, 25 to 40 percent slopes 7K Well drainedCVery limitedVery limited
Colo silt loam, 0 to 2 percent slopes, occasionally flooded, overwash 6K Poorly drainedC/DVery limitedVery limited
Downs silt loam, till plain, 9 to 14 percent slopes, eroded 6K 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 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

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.

Look Up a Specific Address

📍