Knox and Lincoln Counties, Maine
The dominant drainage class is Somewhat excessively 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 Knox and Lincoln Counties, Maine.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Water bodies | 132K | Not rated | Not rated | ||
| Lyman-Rock outcrop-Tunbridge complex, 8 to 15 percent slopes | 100K | Somewhat excessively drained | D | Very limited | Very limited |
| Swanville silt loam, 0 to 3 percent slopes | 41K | Poorly drained | C/D | Very limited | Very limited |
| Peru fine sandy loam, 0 to 8 percent slopes, very stony | 38K | Moderately well drained | C/D | Very limited | Very limited |
| Lyman-Rock outcrop-Tunbridge complex, 0 to 8 percent slopes | 29K | Somewhat excessively drained | D | Very limited | Very limited |
| Boothbay silt loam, 3 to 8 percent slopes | 25K | Somewhat poorly drained | D | Very limited | Very limited |
| Scantic silt loam, 0 to 3 percent slopes | 23K | Poorly drained | D | Very limited | Very limited |
| Borosaprists, ponded | 21K | Very poorly drained | A/D | Very limited | Very limited |
| Tunbridge-Lyman complex, 3 to 8 percent slopes, rocky | 21K | Well drained | C | Very limited | Very limited |
| Lyman-Rock outcrop-Tunbridge complex, 15 to 45 percent slopes | 20K | Somewhat excessively drained | D | Very limited | Very limited |
| Tunbridge-Lyman complex, 8 to 15 percent slopes, rocky | 19K | Well drained | C | Very limited | Very limited |
| Peru fine sandy loam, 3 to 8 percent slopes | 18K | Moderately well drained | C/D | Very limited | Very limited |
| Lyman-Brayton variant-Rock outcrop complex, 0 to 8 percent slopes | 17K | Somewhat excessively drained | D | Very limited | Very limited |
| Lamoine silt loam, 3 to 8 percent slopes | 16K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Peru fine sandy loam, 8 to 15 percent slopes, very stony | 14K | Moderately well drained | C/D | Very limited | Very limited |
| Boothbay silt loam, 8 to 15 percent slopes | 14K | Somewhat poorly drained | D | Very limited | Very limited |
| Brayton fine sandy loam, 0 to 8 percent slopes, very stony | 12K | Poorly drained | D | Very limited | Very limited |
| Marlow fine sandy loam, 8 to 15 percent slopes, very stony | 11K | Well drained | C | Somewhat limited | Somewhat limited |
| Buxton silt loam, 8 to 15 percent slopes | 8K | Moderately well drained | C/D | Very limited | Very limited |
| Rock outcrop-Lyman complex, 3 to 15 percent slopes | 7K | Very limited | Very limited |
What This Means
Building & Foundations
About 75% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, sandy or gravelly soils with low bearing capacity. A geotechnical assessment is recommended before building.
Septic Systems
About 75% of soils are rated "very limited" for septic absorption fields. The well-drained soils may actually drain too fast for standard leach fields, allowing effluent to reach groundwater. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Soils tend to drain very quickly, meaning nutrients and water don't stick around long. Raised beds with amended soil, drip irrigation, and heavy mulching will give the best results. Compost is your best friend here — it improves water retention dramatically.