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National Wetlands Inventory Map Report for Oregon Coast Range: Benton, Clatsop, Columbia, Douglas, Lane, Lincoln, Polk, Tillamook, Washington, and Yamhill Counties

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National Wetlands Inventory Map Report for Oregon Coast Range: Benton, Clatsop, Columbia, Douglas, Lane, Lincoln, Polk, Tillamook, Washington, and Yamhill Counties National Wetlands Inventory Map Report for Oregon Coast Range: Benton, Clatsop, Columbia, Douglas, Lane, Lincoln, Polk, Tillamook, Washington, and Yamhill Counties. Project ID: R01Y08P14 Oregon Coast Range Project area is restricted to portions of the following USGS 7.5 minute quadrangles: Benton County Nonpareil1 Oak Creek Valley1 Alsea Tenmile1 Digger Mountain White Rock1 Flat Mountain Winston1 Glenbrook Kings Valley Lane County Marys Peak Prairie Peak Cummins Peak Summit Greenleaf Wren Herman Creek Horton Clatsop County Mapleton Noti Elsie Tiernan Green Mountain Triangle Lake Hamlet Walton Saddle Mountain Windy Peak Sager Creek Soapstone Lake Lincoln County Sunset Spring Vinemaple Cannibal Mountain Wickiup Mountain Devils Lake Eddyville Columbia County Elk City Euchre Mountain Bacona Five Rivers Baker Point Grand Ronde Birkenfeld Grass Mountain Clear Creek Harlan Pittsburg Hellion Rapids Vernonia Midway Mowrey Landing Douglas County1 Nortons Stott Mountain Dixonville1 Tidewater Dodson Butte 1 Toledo North Glide1 Toledo South Hinkle Creek1 Lane Mountain1 Myrtle Creek1 Polk County Trask Wood Point Fanno Ridge Laurel Mountain Washington County Valsetz Warnicke Creek Buxton Cochran Tillamook County Gobblers Knob Meacham Corner Beaver Roaring Creek Blaine Timber Cedar Butte Turner Creek Cook Creek Dolph Yamhill County Dovre Peak Foley Peak Fairdale Hebo Muddy Valley Jordan Creek Niagara Creek Kilchis River Springer Mountain Rogers Peak Stony Mountain The Peninsula Trask Mountain 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 Idaho Geospatial_Data_Presentation_Form: raster digital data Other_Citation_Details: 1-meter, Natural Color and False Color Collateral Data: USGS 1:24,000 topographic quadrangles USGS Digital raster graphics (DRG’s) Soil Survey of Benton County, Oregon Soil Survey of Clatsop County, Oregon Soil Survey of Columbia County, Oregon Soil Survey of Douglas County, Oregon Soil Survey of Lane County, Oregon Soil Survey of Lincoln County, Oregon Soil Survey of Polk County, Oregon Soil Survey of Tillamook County, Oregon Soil Survey of Washington County, Oregon Soil Survey of Yamhill County, Oregon USGS - NHD – National Hydrography Dataset USGS – DEM – Digital Elevation Model – 10 Meter resolution. Inventory Method: The delineations were done “heads-up” in ArcMap using ARCGIS 9.3 software on USGS digital ortho-photo quadrangles (DOQs) Natural Color imagery (1-meter ground resolution). Imagery for the DOQ production was acquired in 20091. Aerial photo interpretation and heads-up mapping were completed in the USFWS NWI Region 1 office in Portland, Oregon by Tim O’Neill, Rick Griffin and Nicholas Jones, SWCA Environmental Consulting. QC during the mapping was provided by Chris Moller, SWCA Environmental Consulting. Final QA was provided by Jim Dick, Region 2 NWI. Field reconnaissance was conducted in August 2011. 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 Oregon Coast 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. The area covers a portion of 93 1:24,000 USGS quads in Western Oregon. The project area includes the communities of Tillamook, Otis, Lincoln City, Newport, Siletz, Green, Winston plus several other rural Oregon communities. The primary economies of the region include agriculture, grazing, forestry, fisheries, and tourism/recreation. In this area, summer is warm and hot in most valleys and cooler in the mountains. Summer precipitation falls as showers with some thunderstorms occurring. Winters are temperate. Snow and freezing temperatures are not common except at higher elevations. Precipitation falls in the mountains throughout the year, and some deep snowpack accumulates. Average annual temperatures range from a minimum of 27 to a high of 53 degrees F and an average daily temperature of 45 to 55 degrees. There are between 185 and 365 frost-free days per year depending on elevation. The average annual precipitation is between 20 and 140 inches in the area. A majority of the precipitation in the fall, winter and spring is rain and some snow in higher elevation throughout the coastal mountains, which averages from 80 to 140 inches. The major geologic features of the area are diverse. These include igneous, metamorphic and sedimentary features. Soils are diverse as well. Andisols, Alfisols, Inceptisols, Mollisols, Spodisols, Entisols, and Ultisols present within the soil landscape. Description of wetlands: A diversity of wetlands occurs within the Oregon Coast 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 estuarine systems, and other estuarine wetlands. Wetland systems of Lacustrine, Riverine, Estuarine, 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 Estuarine, Lacustrine and Riverine systems. Unvegetated wetlands, present in all systems, include bars, flats, and rocky shores. Emergent wetlands occur in the Estuarine, 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 Continuously submerged estuarine habitats and adjacent tidal wetlands. Variable salinity with less than 30% vegetative cover and at least 25% cover of particles less E1UBL than 6-7cm. Estuarine intertidal persistent emergent wetland, regularly flooded. Salt- to brackish-water marsh with persistent E2EM1N vegetation. Estuarine intertidal persistent emergent wetland, irregularly flooded. Salt- to brackish-water marsh with E2EM1P persistent vegetation. Estuarine intertidal streambed composed of unconsolidated cobbles smaller than stone predominantly E2SB3N intermixed cobble and gravel. Regularly flooded. Estuarine Intertidal Unconsolidated Shore. Irregularly E2SBM Exposed. Estuarine intertidal scrub-shrub and forested needle leaved evergreens (e.g. Picea sitkensis swamps with associated E2SS1/FO4N shrub species) Persistent estuarine intertidal area with scrub-shrub E2SS1P vegetation. Irregularly Flooded. Estuarine intertidal unconsolidated shore, irregularly E2USM exposed. Estuarine intertidal unconsolidated shore, regularly E2USN flooded. Tidal and wind-tidal flats. Permanently flooded, deepwater habitat greater than 20 L1UBH acres in size (e.g., natural lake). Permanently flooded, deepwater habitat greater than 20 acres in size that is created by an impoundment (e.g., L1UBHh reservoir). 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., L2ABH Lemna spp., Potamogeton spp. and Nymphaea spp.). Semi-permanently flooded, lacustrine habitat extending from the shoreward boundary to a depth of 2 meters that is dominated by erect, rooted, herbaceous hydrophytes (e.g., Typha latifolia, Scirpus lacustris, and Scirpus L2EMF americanus). Permanently flooded, open water habitat extending from L2UBH the shoreward boundary to a depth of 2 meters. Semi-permanently flooded ponds vegetated with aquatic beds (e.g., Lemna spp., Potamogeton spp. and Nymphaea PABF spp.). Permanently flooded ponds vegetated with aquatic beds PABH (e.g., Lemna spp., Potamogeton spp. and Nymphaea spp.). Permanently flooded ponds that are influenced by tidal fluctuation and are vegetated with aquatic beds (e.g., PABV Lemna spp., Potamogeton spp. and Nymphaea spp.). Permanently flooded depressions vegetated with a matrix of aquatic beds (e.g., Lemna spp., Potamogeton spp. and Nymphaea spp.) and erect, rooted, herbaceous vegetation PEM/ABH (e.g., Scirpus spp., Typha spp., and Juncus spp.). Seasonally flooded depressions, banks and floodplains characterized by a matrix of persistent herbaceous and PEM/FOC forested vegetation. Temporarily flooded depressions, banks and floodplains characterized by a matrix of herbaceous and scrub-shrub PEM/SSA
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