Island of Ponape, Federated States of Micronesia
The dominant drainage class is Well drained and the dominant hydrologic group is A (high infiltration, low 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 Island of Ponape, Federated States of Micronesia.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Tolonier-Dolen association, 30 to 60 percent slopes | 17K | Well drained | A | Very limited | Very limited |
| Naniak mucky silt loam, 0 to 2 percent slopes, MLRA 195 | 13K | Very poorly drained | B/D | Very limited | Very limited |
| Tolonier-Dolen association, 60 to 99 percent slopes | 13K | Well drained | A | Very limited | Very limited |
| Dolekei-Fomseng association, 15 to 30 percent slopes, cobbly | 7K | Well drained | B | Very limited | Very limited |
| Dolekei-Fomseng association, 30 to 60 percent slopes, cobbly | 6K | Well drained | B | Very limited | Very limited |
| Dolen cobbly silty clay loam, 15 to 30 percent slopes | 4K | Well drained | A | Very limited | Very limited |
| Dolekei-Fomseng association, 15 to 30 percent slopes | 4K | Well drained | B | Very limited | Very limited |
| Umpump silty clay loam, 2 to 8 percent slopes | 3K | Moderately well drained | C | Very limited | Very limited |
| Fomseng-Dolekei association, 60 to 99 percent slopes | 3K | Well drained | D | Very limited | Very limited |
| Umpump gravelly sandy clay loam, 2 to 15 percent slopes | 2K | Moderately well drained | C | Very limited | Very limited |
| Dolekei-Fomseng association, 30 to 60 percent slopes | 2K | Well drained | B | Very limited | Very limited |
| Sonahnpil very stony silty clay loam, 0 to 5 percent slopes, occasionally flooded | 2K | Well drained | A | Very limited | Very limited |
| Rakied extremely gravelly sandy loam, 0 to 5 percent slopes | 2K | Moderately well drained | A | Somewhat limited | Very limited |
| Umpump very gravelly clay loam, 2 to 8 percent slopes | 2K | Moderately well drained | C | Very limited | Very limited |
| Nansepsep silt loam, 0 to 2 percent slopes, occasionally flooded | 2K | Somewhat poorly drained | B | Very limited | Very limited |
| Wahrekdam very gravelly sandy loam, 2 to 8 percent slopes | 1K | Well drained | B | Very limited | Very limited |
| Umpump gravelly silty clay loam, 2 to 8 percent slopes | 1K | Moderately well drained | C | Very limited | Very limited |
| Oatuu taxadjunct silt loam, 15 to 30 percent slopes | 805 | Well drained | D | Very limited | Very limited |
| Dolen cobbly silty clay loam, 6 to 15 percent slopes | 651 | Well drained | A | Somewhat limited | Very limited |
| Inkosr gravelly sandy clay loam, 0 to 2 percent slopes, occasionally flooded | 641 | Poorly drained | B/D | Very limited | Very limited |
What This Means
Building & Foundations
About 97% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, 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.