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ENVIRONMENTAL OVERVIEW Natural Resources and Energy Supply. The project would remove standing water and wetland characteristics from the area, which may be considered natural resources. However, the project itself would not increase the consumption of natural resources or energy supply at the Airport. Water Resources. The project has the potential to affect water resources, specifically wetlands and surface water. As stated in Chapter 1, Inventory of Existing Conditions, these wetlands have not been officially delineated. Prior to the start of ground disturbing activities, the Airport would be responsible for having these wetlands officially delineated in order to determine the regulatory agency with jurisdiction over the wetlands, and the appropriate mitigation for potential effects. Assuming that the wetlands are regulated by the U.S. Army Corps of Engineers, the Airport would be responsible for obtaining a nationwide permit or individual permit, depending on the extent of the potential impacts. With regards to surface waters, the project would not increase impervious surface, but would change the grading of the area. The change in grading would change the flow rate of stormwater runoff in the area. Because the project would disturb over one acre of land, the Airport would be responsible for obtaining a NPDES construction permit prior to the start of ground disturbing activities, and all construction activities would be required to comply with the provisions set forth in that permit. The project would not affect Section 4(f) resources; farmlands; historical, architectural, archaeological, and cultural resources, land use, noise and noise-compatible land use; socioeconomics, environmental justice, and cenvironmental health and safety risks; visual effects; or floodplains because it would not involve the development of the land, increase the number of aircraft operating at the Airport, or change the airfield configuration. An EA is anticipated to be the appropriate NEPA documentation for this project. 7.3.1.7 Terminal Taxiway Reconstruction The Airport plans to reconstruct the terminal taxiway system. The following environmental resource categories may be affected: Air Quality. The project would temporarily increase emissions from construction vehicles and equipment. The increase would be temporary and minor. A construction emissions inventory may be necessary for the NEPA documentation associated with this project. Biological Resources. The area is regularly mowed and maintained and located in an active area of the airfield; therefore, it is unlikely that wildlife regularly utilize the area. However, a federally-threatened species, the Streaked horned lark (Eremophila alpestris strigata) is known to be present throughout portions of the Airport. It is recommended that a biological survey be conducted for the presence- absence of this species. Ground disturbing activities associated with the project would primarily affect grassland and potential habitat for the Streaked horned lark. Climate. The project would temporarily increase emissions from construction vehicles and equipment, including GHG emissions. The increase would be temporary and minor. An estimate of GHG emissions could be included in the construction emission inventory. EUGENE AIRPORT MASTER PLAN 7-12