Wetted Drainage Classes (1)
| Excessively drained |
| Somewhat excessively drained |
| Well drained |
| Moderately well drained |
| Somewhat poorly drained |
| Poorly drained |
| Very poorly drained |
Dominant Hydrologic Soil Groups (HSG) (2)
| Information Not Available |
| A-Low Runoff Potential |
| B-Moderately Low Runoff Potential |
| C-Moderately High Runoff Potential |
| D-High Runoff Potential |
Infiltration by Quarter Section (3)
| <250 |
| 250-500 |
| 500-750 |
| 750-1000 |
| 1000-1250 |
| 1250-1500 |
| 1500-1750 |
| 1750-2000 |
| 2000-2250 |
| 2250-2500 |
| 2500-3000 |
| >3000 |
USGS - Depth to Seasonal High Groundwater (5)
| < 20 |
| 20 - 40 |
| 40 - 60 |
| 60 - 80 |
| 80 - 100 |
| > 100 |
Taggart D Supplemental Depth to Groundwater (6)
| < 10 ft |
| 10-15 ft |
| 15-20 ft |
| 20-30 ft |
Holgate Lake Supplemental Depth to Groundwater (7)
|
| 0-10 ft |
| 10-20 ft |
| 20-30 ft |
| 30-40 ft |
| 40-50 ft |
|
| > 50 ft |
Plan Districts (8)
| Cascade Station |
| Columbia South Shore |
Wellfield Protection Area (9)
Percent Slope (11)
| Less than 5% |
| 5-10% |
| 10-15% |
| 15-20% |
| Greater than 20% |
Regional Geology (12)
| Alluvium |
| Artifical fill |
| Basalt of Jenne |
| Basalt of Powell Butte |
| Basalt of Mt. Scott |
| Basalt of Ginkgo |
| Basalt of Sand Hollow |
| Basalt of Waverly Heights |
| Neogene mudstones |
| Channel facies |
| Coarse-grained facies |
| Eolian Deposits |
| Fine-grained facies |
| Hillsboro Formation |
| Landslide deposits |
| Marine Sandstone |
| Ortley unit |
| R2 Grande Ronde Basalt |
| Sentinel Bluffs |
|
| Troutdale Formation Conglomerate |
| Undifferentiated Boring Lava |
| Undifferentiated Col. River Basalt |
| Winter Water unit |
Depth to Lithic Bedrock (13)
| 2 - 3 |
| 3 - 5 |
Depth to Fragipan (14)
Combined Sewer Basins (16)
Port of Portland DSM Boundary (17)
|
