Description:This polygon coverage is a subset of the larger data set 'GLO Historical Wet Prairie Vegetation of the Willamette Valley, Oregon, 1851-1910'. The 'Select by Attribute' tool was used to with the clause: Where 'VEGTEXT' is equal to 'Seasonally wet prairie May have scattering trees, most with distances > 100 links' This dataset and the larger dataset from which it was extracted, depicts historical vegetation in the Willamette Valley, Oregon, and portions of the Columbia River floodplain in Oregon. It is based on land survey data recorded by General Land Office (GLO) surveyors between 1851 and 1910, including township and section line data. Areas described in the original GLO survey descriptions as 'prairie', were classified as 'wet prairie' base on present day NRCS hydric soil mapping.
Copyright:Mapping was completed in stages, funded by the Oregon Department of State Lands (1995, 1996), the USDI Bureau of Land Management (1995, 1997, 1999), the Oregon Community Foundation (1997), the Environmental Protection Agency (1997), the City of Portland Bureau of Environmental Services (1997), the Oregon Department of Fish and Wildlife (2000), the USDA Forest Service (2002, 2008), The Nature Conservancy (2007), Metro (2007), and the Lower Columbia River Estuary Program (2010).