National Wetlands Inventory Map Report for Ridgefield NWR and Vicinity Quads: Columbia, Multnomah and Washington Counties, Orego
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National Wetlands Inventory Map Report for Ridgefield NWR and Vicinity Quads: Columbia, Multnomah and Washington Counties, Oregon and Cowlitz and Clark Counties Washington Project ID: R01Y10P10: Ridgefield NWR Project area is restricted to portions of the following USGS 7.5 minute quadrangles: Oregon: 45122-G7 (Saint Helens) 45122-F7 (Sauvie Island) 45122-E7 (Linnton) 45122-E6 (Portland) 45122-E5 (Mount Tabor) 45122-E4 (Camas) Washington: 45122-G6 (Ridgefield) 45122-F6 (Vancouver) 45122-E3 (Washougal) Source Imagery: Citation: For all quads listed above: Citation_Information: Originator: USDA-FSA-APFO Aerial Photography Field Office Publication_Date: 2009 Publication place: Salt Lake City, Utah Title: Digital Orthoimagery Series of Washington Geospatial_Data_Presentation_Form: raster digital data Other_Citation_Details: 1-meter, Natural Color Citation: For all quads listed above: Citation_Information: Originator: USDA-FSA-APFO Aerial Photography Field Office Publication_Date: 2011 Publication place: Salt Lake City, Utah Title: Digital Orthoimagery Series of Oregon Geospatial_Data_Presentation_Form: raster digital data Other_Citation_Details: 1-meter, Natural Color Collateral Data: . USACE LiDAR vegetation survey 2009 . USGS 1:24,000 topographic quadrangles . USGS – NED – National Elevation Dataset – 3 meters resolution . USGS – NHD – National Hydrography Dataset . Soil Survey of Columbia County, Oregon . Soil Survey of Multnomah County, Oregon . Soil Survey of Washington County, Oregon . Soil Survey of Clark County, Washington . Soil Survey of Cowlitz County, Washington Inventory Method: Wetland identifications were done “heads-up” in ArcMap 9.3 and ArcMap 10. Aerial photo interpretation and heads-up mapping were completed in the USFWS NWI Region 1 office in Portland, Oregon by Nicholas Jones, SWCA Environmental Consulting. QC during the mapping was provided by Chris Moller, SWCA Environmental Consulting. Final QA was provided by Bill Kirchner, R1 NWI coordinator. Field reconnaissance was conducted in May 2012. The purpose of the field work was to correlate varying signatures found on the photography to actual ground conditions. Vegetation, soils, and hydrologic conditions were examined at field sites. Data Limitations: The user of the map is cautioned that, due to the limitation of mapping primarily through aerial photo interpretation, a small percentage of wetlands may have gone unidentified. Since the photography was taken during a particular time and season, there may be discrepancies between the map and current field conditions. Changes in landscape which occurred after the photography was taken would result in such discrepancies. Classification: The wetland classifications that appear in the Ridgefield NWR and adjacent area quads National Wetlands Inventory (NWI) Maps are in accordance with the Classification of Wetlands and Deepwater Habitats of the United States (Cowardin et al. 1979). General Description of the Project Area: The project area is located in Land Resource Region A, Northwestern Forest, Forage, and Specialty Crop Region and includes the “Northern Pacific Coast Range, Foothills and Valleys.” Cities and Towns include Portland, Gresham, Vancouver, Ridgefield, Camas and Troutdale. The average annual precipitation is 30 to 60 inches (760 to 1,525 millimeters). Most of the rainfall occurs as low-intensity, Pacific frontal storms. Precipitation is evenly distributed throughout fall, winter, and spring, but summers are warm and dry. The average annual temperature is 45 to 55 degrees F (7 to 13 degrees C). Geology consists primarily of young Tertiary sedimentary rocks (siltstone and sandstone) mixed with volcanic rocks of the same age. Also, glacial till and outwash deposits are in the northern half of the portion of the area in Washington. The landmass in Oregon consists primarily of sedimentary rocks with some minor volcanic rocks (Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin. USDA handbook 296) Description of wetlands: A diversity of wetlands occurs along the Columbia River and adjacent project area. The complex geology of the region supports wet meadows, slope wetlands, sloughs, springs, lacustrine fringe wetlands, palustrine wetlands adjacent to riverine systems, tidally influenced riverine and freshwater palustrine systems. Wetland systems of Lacustrine, Riverine, and Palustrine are represented in the subject area. Deepwater habitats are areas that are permanently flooded and are characterized by open water on the aerial photography. These habitats are present in the Lacustrine and Riverine systems. Unvegetated wetlands, present in all systems, include bars, flats, and rocky shores. Emergent wetlands occur in the Palustrine, and Lacustrine systems. There is a prevalence of wet meadow. Scrub-shrub and forested wetlands occur within the Palustrine systems. In the Palustrine system, these wetlands occur along the banks and floodplains of drainages, in bogs, swamps, at or below seeps and springs, and in depressions. Description of attribute values: This table reflects classification to the class level and the water regime only. No intent is made to capture Subclasses in this table since subclass designations were made for each polygon associated with the geodatabase. ATTRIBUTE DESCRIPTION Permanently flooded, deepwater habitat greater than 20 acres L1UBH in size (e.g., natural lake). Permanently flooded, deepwater habitat greater than 20 acres L1UBHh in size that is created by an impoundment (e.g., reservoir). Permanently flooded, tidally influenced, deepwater habitat L1UBV greater than 20 acres in size (e.g., natural lake). Permanently flooded, fresh water tidal, open water lacustrine habitat extending from the shoreward boundary to a depth of 2 L2ABV meters that is dominated by aquatic vegetation Semi-permanently flooded, open water lacustrine habitat extending from the shoreward boundary to a depth of 2 meters that is dominated by aquatic vegetation (e.g., Lemna spp., L2ABF Potamogeton spp. and Nymphaea spp.). Intermittently exposed, open water lacustrine habitat extending from the shoreward boundary to a depth of 2 meters that is dominated by aquatic vegetation (e.g., Lemna spp., L2ABG Potamogeton spp. and Nymphaea spp.). Permanently flooded, open water lacustrine habitat extending from the shoreward boundary to a depth of 2 meters that is dominated by aquatic vegetation (e.g., Lemna spp., L2ABH Potamogeton spp. and Nymphaea spp.). Semi-permanently flooded, open water lacustrine habitat extending from the shoreward boundary to a depth of 2 meters that is dominated by non-persistent emergent vegetation during part of the year (e.g., Lemna spp., Potamogeton spp. and L2EM2F Nymphaea spp.). Semi-permanently flooded, tidally influenced, open water lacustrine habitat extending from the shoreward boundary to a depth of 2 meters that is dominated by non-persistent emergent vegetation during part of the year (e.g., Lemna spp., L2EM2T Potamogeton spp. and Nymphaea spp.). Lacustrine, littoral unconsolidated shore habitat extending from the shoreward boundary to a depth of 2 meters. Seasonally L2USC flooded. Lacustrine, littoral unconsolidated shore habitat extending from the shoreward boundary to a depth of 2 meters. Seasonally L2USR flooded and tidally influenced Lacustrine, littoral unconsolidated shore habitat extending from the shoreward boundary to a depth of 2 meters. Temporarily L2USS flooded and tidally influenced Semi-permanently flooded, open water habitat extending from L2UBF the shoreward boundary to a depth of 2 meters. Intermittently exposed, open water habitat extending from the L2UBG shoreward boundary to a depth of 2 meters. Permanently flooded, open water habitat extending from the L2UBH shoreward boundary to a depth of 2 meters. Open water habitat extending from the shoreward boundary to a depth of 2 meters. Artificially flooded with pumps, L2UBK impoundments and/or siphons. Semi-permanently flooded-tidal, open water habitat extending L2UBT from the shoreward boundary to a depth of 2 meters. Semi-permanently flooded ponds vegetated with algal aquatic PAB1F beds. Semi-permanently flooded ponds vegetated with rooted- PAB3F vascular aquatic beds. Permanently flooded ponds vegetated with aquatic beds (e.g., PABH Lemna spp., Potamogeton spp. and Nymphaea spp.). Artificially flooded ponds, controlled by means of pumps or PABK siphons. Dominated by aquatic vegetation. Semi-permanently flooded ponds that are influenced by tidal fluctuation and are vegetated with aquatic beds (e.g., Lemna PABT spp., Potamogeton spp. and Nymphaea spp.). Permanently flooded ponds that are influenced by tidal fluctuation and are vegetated with aquatic beds (e.g., Lemna PABV spp., Potamogeton spp. and Nymphaea spp.). Seasonally flooded-tidal depressions, banks and floodplains characterized by a matrix of persistent herbaceous and PEM1/FO1R forested vegetation. Temporarily flooded depressions, banks and floodplains characterized by a matrix of herbaceous and scrub-shrub PEM1/SS1A vegetation. Seasonally flooded depressions, banks and floodplains characterized by a matrix of herbaceous and scrub-shrub PEM1/SS1C vegetation. Seasonally flooded, freshwater tidal depressions, banks and floodplains characterized by a matrix of herbaceous and scrub- PEM1/SS1R shrub vegetation. Seasonally flooded, freshwater tidal depressions, banks and floodplains characterized by a matrix of herbaceous vegetation PEM1/USR and unconsolidated shore. Temporarily flooded wetlands dominated