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The LWI Wetlands dataset is part of the Oregon Department of State Lands (DSL) Local Wetlands Inventory (LWI) LWI_Statewide dataset. The LWI_Statewide dataset is part of the Statewide Wetlands Inventory and supersedes the national inventory level mapping included in the SWI.
In accordance with the Department of State Lands’ LWI standards, the approximate location and boundaries of all wetlands at least 0.5 acre in size and waters are identified within a specified study area. LWIs developed after 2001 also included “probable wetlands” (“PW”) to indicate locations of wetlands and waters less than one-half acre in size. Further information on the development and results of individual LWIs can be found in the LWI reports on the DSL LWI web page. |
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The LWI Wetlands dataset is part of the Oregon Department of State Lands (DSL) Local Wetlands Inventory (LWI) LWI_Statewide dataset. The LWI_Statewide dataset is part of the Statewide Wetlands Inventory and supersedes the national inventory level mapping included in the SWI.
In accordance with the Department of State Lands’ LWI standards, the approximate location and boundaries of all wetlands at least 0.5 acre in size and waters are identified within a specified study area. LWIs developed after 2001 also included “probable wetlands” (“PW”) to indicate locations of wetlands and waters less than one-half acre in size. Further information on the development and results of individual LWIs can be found in the LWI reports on the DSL LWI web page. |
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Local Wetlands Inventories received and approved by DSL dating from 1992 through 2019 were digitized and standardized by DSL, Institute for Natural Resources, and Oregon State University Libraries and Press. DSL combined the individual standardized LWI datasets into an LWI_Statewide dataset. New LWIs are added to the LWI_Statewide dataset upon approval by DSL. Individual LWIs are developed by consultants for local governments. Find full reports, citations, maps, and individual LWI GIS datasets on the DSL LWI web page.
The digitizing and standardization of LWI GIS datasets approved by the Oregon Department of State Lands prior to 2018 has been funded wholly or in part by the United States Environmental Protection Agency under assistance agreement number CD-01J37701-02 to the Oregon Department of State Lands. The contents of this LWI dataset do not necessarily reflect the views and policies of the Environmental Protection Agency, nor does mention of trade names or commercial products constitute endorsement or recommendation for use. |
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<DIV STYLE="text-align:Left;"><P STYLE="margin:0 0 8 0;"><SPAN><SPAN>Local Wetlands Inventory development requires an LWI Wetlands dataset displaying all wetlands greater than or equal to one-half of an acre and all wetlands identified in DSL-approved wetland delineation reports to be identified and mapped as polygons with a goal accuracy of +/- 5 meters (under 2009 LWI rules).</SPAN></SPAN></P><P STYLE="margin:0 0 8 0;"><SPAN STYLE="font-weight:bold;"><SPAN>LWIs developed prior to 2001 did not require mapping of wetlands less than one half acre in size.</SPAN></SPAN><SPAN><SPAN> Beginning in 2001 mapping of “Probable Wetland" or “PW” is required and means an area noted during the LWI development that appeared to meet wetland criteria but was less than one half of an acre in size or was small and of undetermined size. Therefore, there may be unmapped wetlands within the study areas of all LWIs, particularly older inventories.</SPAN></SPAN></P><P STYLE="margin:0 0 8 0;"><SPAN><SPAN>LWI wetland polygons are associated with wetland functional assessment results and wetland summary sheets, found within the LWI report. Wetland polygons include required attributes including unique wetland identification label, Cowardin classification code(s) and modifiers, HGM classification, approximate wetland size, Locally Significant Wetland status determination, whether the wetland investigation was onsite, offsite, or visually confirmed, and DSL's wetland delineation report file number, if any.</SPAN></SPAN></P><P STYLE="margin:0 0 8 0;"><SPAN><SPAN>The LWI Wetlands dataset is part of the LWI_Subset pulled from the LWI_Statewide dataset. The LWI_Subset dataset is used for the ORWAP and SFAM assessments map viewer.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Upon approval by DSL the LWI must be used in lieu of the National Wetlands Inventory (NWI) and is incorporated into the Statewide Wetlands Inventory. The approved LWI must be used by cities and counties for notifying DSL of land use applications affecting mapped wetlands and other waters in the wetland land use notice (WLUN) process (ORS 215.418 and 227.350).</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>New LWIs are added to the LWI_Statewide dataset upon approval by DSL. The LWI_Statewide dataset is part of the Statewide Wetlands Inventory and supersedes the national inventory level mapping included in the SWI web map. View the SWI web map on the DSL SWI web page.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Some local governments must inventory and include protections for resources listed in Oregon’s land use planning goals 5 (Natural Resources), 16 (Estuaries) and 17 (Coastal Shorelands). An LWI fulfills the wetlands inventory requirements for Goal 5 and Goal 17 (OAR 660-015, 660-016, and 660-023). DSL is responsible for the requirements and review of LWIs for Goal compliance and other natural resource planning efforts. In accordance with the DSL’s LWI standards, the approximate location and boundaries of all wetlands and waters are identified within a specified study area.</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>Further information on the individual LWI development, results and citations can be found in the LWI report on the DSL LWI webpage. The original maps, individual GIS datasets, the DSL LWI GIS Data Description and template are also available for view and download on the DSL LWI web page.</SPAN></P></DIV> |
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<DIV STYLE="text-align:Left;"><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>Information included in this dataset is for planning purposes, represents conditions that existed when the data were originally developed, and is subject to change. The location and extent of wetlands and other waters is approximate. </SPAN></SPAN><SPAN STYLE="font-style:italic;font-weight:bold;"><SPAN>There may be unmapped wetlands and other waters present that are subject to local, state, and federal regulation</SPAN></SPAN><SPAN><SPAN>. A current Oregon Department of State Lands-approved wetland delineation is required for state removal-fill permits. You are advised to contact the Department of State Lands and the U.S. Army Corps of Engineers with any regulatory questions.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN><SPAN>This product is for informational purposes, and may not be suitable for legal, engineering, or surveying purposes. This information or data is provided with the understanding that conclusions drawn from such information are the responsibility of the user.</SPAN></SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>The goal boundary accuracy for LWIs developed prior to 2009 is +/- 25 feet. The goal boundary accuracy after 2009 is +/- 5 meters (16.4 feet).</SPAN></P></DIV> |
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LWIWetlands |
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["Local Wetlands Inventory","LWI","Oregon","Wetlands","SWI"] |
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