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Vantage to Pomona Heights Chapter 4 230 kV Transmission Line Project FEIS Environmental Consequences PAGE 4-129 • Cause indirect, long-term impacts to high or moderate sensitivity land uses; • Cause direct, long-term impacts to Important Farmland not currently under cultivation; • Cause direct, long-term impacts to Public Land Survey System sections containing Conservation Reserve Program (CRP) lands; • Occupy military land, but does not substantially alter training operations; • Alter the use of the land according to existing land management plans; and/or • Cause short-term impacts to agricultural operations or land. Low - Impacts would be considered low where the proposed Project would: • Create short-term disturbances during construction to any land use sensitivity; and/or • Be compatible with low sensitivity land uses. No impact would occur where land uses would be able to continue as they currently exist. Private land that is not residential or agricultural is assumed to potentially be used for grazing and low impacts may occur. Public lands that are not leased for grazing, agriculture, or other uses would be able to continue as they currently exist and the proposed Project would not result in a change to the use. 4.4.3 Impacts Common to All Route Segments and Design Options Land uses within or near the Action Alternative route segments would be temporarily disrupted by construction activities such as noise, dust, and traffic. Construction of the proposed Project would temporarily disturb these areas as a result of heavy construction equipment on access roads while moving building materials to transmission line structure sites and returning to construction staging areas. Construction of the proposed Project would involve installation of new transmission line structures. Installation of the new transmission line structures would temporarily disturb land use and landcover at each H-frame or single pole location. Established land uses at the proposed H-frame or single pole locations would be temporarily displaced during construction. Short-term land disturbances would result in a moderate impact in areas where developed land uses occur within or adjacent to proposed route segment ROW corridors (includes residences within 500 feet of a route segment). After construction of the proposed Project, land uses that would be compatible with safety regulations would be permitted in and adjacent to the Project’s ROW corridor. Existing land uses such as agriculture and grazing are generally permitted within transmission line ROW corridors. Incompatible land uses within the proposed Project’s ROW corridor include construction and maintenance of inhabited dwellings and any land use requiring changes in surface elevation that would affect conductor clearances with existing or planned facilities. Land uses that comply with local regulations would generally be permitted adjacent to the proposed Project’s ROW corridor. Compatible uses of the proposed Project’s ROW corridor on either federal or state lands would have to be approved by the applicable federal and/or state land management agency. Permission to use the proposed Project’s ROW corridor on private lands would be determined by Pacific Power in consultation with the landowner. The proposed Project’s Columbia River crossing structures could potentially affect aviation activities by modifying aircraft operations and air navigation. With regard to aviation safety, Subpart B, Section 77.13 of the guidelines of the Federal Aviation Administration (FAA) indicate that construction of a project could potentially have a significant impact on aviation activities if a structure or any equipment is