OAR 350-010-0050
Natural and Human Management Processes Do Not Affect Exterior, Special Management Area, or Urban Area Boundaries
(1)
The location of the exterior boundary, a special management area boundary or an urban area boundary does not shift in response to natural processes that occur over a long period of time, such as accretion and reliction of rivers and streams or ordinary high water, or as a result of major sudden event, such as an avulsion, flooding, landslide, or earthquake. The exterior boundary, special management area boundary or urban area boundary remains at the location described prior to the event.(2)
The location of the exterior boundary, a special management area boundary or an urban area boundary does not shift in response to management of the normal pool elevation behind Bonneville and The Dalles dams. The normal pool elevation is as defined by dam operations on November 17, 1986.(3)
The location of the exterior boundary, a special management area boundary or an urban area boundary does not shift in response to relocation or realignment of linear features, including but not limited to roads and highways, railroads, pipelines, or powerlines, or their associated rights-of-way or easements. A Legal Boundary Description that uses a linear feature means the linear feature as it existed on November 17, 1986, or as otherwise noted in the Legal Boundary Description.(4)
The location of the exterior boundary, a special management area boundary or an urban area boundary does not shift in response to changes in land management boundaries, including, but not limited to, land use designation, zoning, special district, municipal boundaries and approved urban growth boundaries. A Legal Boundary Description that refers to a land management boundary means the land management boundary as it existed on November 17, 1986, or as otherwise described in the Legal Boundary Description.
Source:
Rule 350-010-0050 — Natural and Human Management Processes Do Not Affect Exterior, Special Management Area, or Urban Area Boundaries, https://secure.sos.state.or.us/oard/view.action?ruleNumber=350-010-0050.