Legend (Public/PPD_Flood_and_Natural_Resources)

Columbia Slough Levees (12) MCDD 142nd Cross Levee Denver Ave/I-5 Embankment MCDD/SDIC 223rd Cross Levee MCDD Columbia River East Levee MCDD Columbia River West Levee MCDD Columbia Slough Levee PEN1 Columbia River Levee / Flood Wall PEN1 Columbia Slough Levee PEN1 Railroad Embankment PEN2 Columbia River Levee PEN2 Columbia Slough Levee PEN2/MCDD Cross Levee SDIC Columbia River Levee Columbia Slough Watershed Levee Buffers (13) Elevation Certificate (24) FEMA Special Flood Hazard Area (100 Year) (30) FEMA 500 Year Flood Zone (31) Flood - 1996 Flood Inundation Area (32) Flood Response Stages (33) River Gauge levels below Phase 1 Flood Extent - Phase 1 Flood Extent - Phase 2 Flood Extent - Phase 3 Flood Extent - Phase 4 Flood Extent - Phase 5 Geology - Deep Landslide Susceptibility (124) 1 2 3 Geology - Shallow Landslide Susceptibility (125) 1 2 3 Geology - Bedrock (DOGAMI) (126) Geology - Surficial (DOGAMI) (127) GeoTechnical Report (34) Heritage Trees (35) Liquefaction Hazard (PWB) (42) Very High High Moderate Low Natural Resource Plan Boundary (44) Regulatory Landslide Hazard Area (BDS) (63) Steep Slopes (20% or Higher) (69) Streams (187) Open Channel Ditch Water Body Stormwater Pipe Stormwater Culvert Combined Stormwater/Sewer Pipe Tree Inspector Zone - Development Focus (95) Tree Inspector Zone - Non Development Focus (96) USGS Depth to Seasonal High Groundwater-10ft Contour (78) < 10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 > 100 Waterbody (79) Wetlands (189) City of Portland Wetlands (169) Regional Waterbodies (170) City of Portland Streams (171) Open Channel Ditch Water Body Stormwater Pipe Stormwater Culvert Combined Stormwater/Sewer Pipe National Wetlands Inventory (Metro) (172) Freshwater Emergent Wetland Freshwater Forested/Shrub Wetland Freshwater Pond Lake Riverine NHD Area Portland (173) NHD Streams and Rivers Portland (174) NHD Waterbody Portland (175) NRCS Predominantly Hydric Soil Map Units (176) Wild Lands Fire Hazard (81)