Reasonable Alternative Two – Site A Build Alternative 3. (Proposed Action) The “Build Alternative” will require the acquisition of 582 acres of land. Of the 582 acres, approximately 302 acres will be directly converted from agricultural use to land that is used to accommodate proposed airside and landside facilities. 279 acres will be managed as “on-airport” agricultural land. Neither the closure of the existing public owned airports nor the development of the replacement airport cause a shift in population or a decrease in employment opportunity. The proposed actions may potentially sustain and expand employment opportunities within the combined airport service area. Potential effects, as a resulting from the introduction of aircraft noise, will have a less than significant impact on land uses adjacent to the proposed site. During the site selection phase of the project planning process, Mahaska County was consulted regarding the disconnection of 220th Street. The County Engineer, in a letter dated July 1, 2013, indicated that action to disconnect would be undertaken if acceptable mitigation actions are identified (see Appendix G). The proposed disconnect would occur at the proposed airport property line (see Appendix E, Airport Layout Plan, and Figure 5-1). 220th Street, located west of the disconnect point, will continue to provide access to Iowa Highway 163 for three (3) residential units and out buildings. 220th Street will also provide access to the elevated water storage tower owned and operated by the Mahaska Rural Water Systems, Inc. (see Figure 5-1). The South Central Regional Airport Agency proposes using 220th Street, west of the disconnect point, to provide access to the terminal area. The roadway extending between Iowa Highway 163 and the terminal access point will ultimately be upgraded and hard surfaced. The proposed roadway improvements are included as a proposed capital project within the Airport Master Plan. There are no residential acreages or farmsteads located on 220th Street east of the proposed disconnect point to Independence Avenue. 220th Street, east of the disconnect point, would be maintained to provide access to abutting agricultural land. Independence Avenue provides access to Iowa Highway 163. The distance from the intersection of 220th Street/Independence Avenue to Iowa Highway 163 is approximately 5,520 feet. The distance from the same point along existing 220th Street to Iowa Highway 163 is approximately 7,900 feet (see Figure 5-1). The Proposed Action may result in increased v...
