OAR 141-086-0200


“Cowardin class or subclass” means the wetland classification according to the U.S. Fish and Wildlife Service’s Classification of Wetlands and Deepwater Habitats of the United States, Cowardin et al., 1979.


“Director” means the Director of the Oregon Department of State Lands or designee.


“Department” means the Oregon Department of State Lands.


“Georeferenced” means linking geographic data to known coordinates on the surface of the earth.


“GIS” or “Geographic Information System” means a system of hardware, software and data storage that allows for the analysis and display of information that has been geographically referenced.


“HGM class and subclass” means the hydrogeomorphic classification of the wetland based upon its landscape position and hydrology characteristics, according to the HGM classification developed by the Department.


“Indicator” means the soil, vegetation, and hydrology characteristics or other field evidence that indicate that wetlands are present.


“Inventory” means a systematic survey of an area to identify, classify and map the approximate boundaries of wetlands, and includes the supporting documentation required by these rules.


“Mapping” means representing the identified wetlands and their approximate boundaries on a map.


“Offsite Determination” means a wetland determination conducted without field verification using NWI maps, soils maps, and aerial photographs.


“Other Waters” means waters of the state other than wetlands, such as streams and non-vegetated ponds.


“Probable Wetland” or “PW” means an area noted during the course of LWI development that appears to meet wetland criteria but is less than one half of an acre in size or is small and of undetermined size, and is mapped as a point rather than a polygon on the LWI maps.


“Sample Plot” means a specific area on the ground where soils, vegetation and hydrology data are recorded on a field data form per OAR 141-90-0035(14) in order to make a wetland determination.


“Statewide Wetlands Inventory” or “SWI” means an inventory that contains at minimum the location, type (e.g. classification) and approximate extent of wetlands in the State of Oregon. This inventory is continually revised as additional information is received or obtained by the Department.


“Stream” means a watercourse created by natural processes, or one that would be in a natural state if it were not for human-caused alterations. Stream includes a channelized or relocated stream.


“Visually confirm” or “visual confirmation” means to walk over and/or visually check an area to make a wetland determination and map wetlands and other waters.


“Wetlands” means those areas that are inundated or saturated by surface or ground water at a frequency or duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions (ORS 196.800 (Definitions for ORS 196.600 to 196.921)(16)).


“Wetland Delineation Report” means a written document that contains the methods, data, conclusions and maps used to determine if wetlands and/or other waters of the state are present on a land parcel and, if so, describes and maps their location and geographic extent. A wetland determination report documenting wetland presence or absence is included within this definition (OAR 141-090 et seq.).


“Wetland Determination” means a decision that a site may, does, is unlikely to, or does not contain wetlands. A determination does not include the precise location or boundaries of any wetlands determined to be present (OAR 141-090 et seq).


“Wetland Mosaic” means a complex of several wetlands that are interspersed between areas of non-wetland each less than one half of an acre in size, or less than one tenth of an acre in size for a WCP, making them difficult to map.
Last Updated

Jun. 8, 2021

Rule 141-086-0200’s source at or​.us