Reasonable Alternative One. Site B With the exception of a farmstead, county roads (220th Street, Xxxx Avenue) and grass waterways, the balance of the site is under cultivation. The location of any habitat associated with threatened, endangered, and special concern species on the site is minimal. There are no woodland or trees located on the site. Therefore, Reasonable Alternative One – Site B will have no adverse effect on critical habitats associated with threatened, endangered, and special concern species.
Reasonable Alternative One. Site B There will be an increase in CO2 emission equal to the emissions by aircraft that will be relocated from the Pella, Oskaloosa, and Ottumwa Municipal Airports. Within the combined airport service area, there will be a net reduction of greenhouse gases since there will be one airport to maintain and operate rather than two airport facilities.
Reasonable Alternative One. Site B There are no Section 4(f) resources on or adjacent to the site; therefore, there are no adverse effects anticipated. There are no Section 6(f) funded parks or recreation facilities located on or adjacent to the site.
Reasonable Alternative One. Site B Development of Site B will require the acquisition of approximately 524 acres. The land acquired will be federally obligated. The total points (164 from Part V and Part VI does not exceed the maximum point threshold of 260 (see Appendix B – Form AD-1006). A score below 160 does not require further analysis. Where the total points equal or exceed 160, alternative actions, where appropriate, should be considered.
Reasonable Alternative One. Site B There are no known hazardous materials or substances within the area proposed for acquisitions or on property adjacent to the proposed site. Fuel (Jet A, 100LL) will be stored in double wall above ground storage tanks. The above ground storage tanks will not exceed 12,000 gallons each.
Reasonable Alternative One. Site B There are no known historical, architectural, archaeological and cultural resources on Site B. A Phase I Cultural Resource survey will be done prior to the acquisition of the land and/or construction.
Reasonable Alternative One. Site B The development of Site B will require the acquisition of approximately 524 acres of land in unincorporated Mahaska County. The proposed site with the exception of drainage and grass waterways, country road, and a farmstead is under cultivation with corn and soybeans being the dominant agricultural crop. The City of Leighton is located within 3,000 feet of the proposed crosswind runway and within 4,000 feet of the nearest point on the primary runway. The approach surfaces associated with the primary and crosswind runways do not extend over the city with agricultural uses primarily found under the runway approach surfaces. The City of Leighton is the largest concentration of people (Population 162 based on 2010 U.S. Census). The concept plan (see Figure 3-1) may ultimately require the disconnection and/or the relocation of 220th Street. The county road (220th Street) is a paved all weather road providing access from the east to the City of Leighton. It, along with Xxxxx Avenue, are the primary roads providing access to the City from Iowa Highway 163. Conversion of Site B will require the relocation of one (1) farmstead and building demolition. The farmstead is located west of the primary runway. Access to the farmstead (from 205th Street and Iowa Highway 163) is provided by Xxxx Avenue. To develop the conceptual airport, Xxxx Avenue will need to be abandoned south of 205th Street and the farmstead. The optimum location for a terminal area is between the intersecting runways. The location would require a new public roadway be constructed from Iowa Highway 163. Other than provide access to the proposed terminal and abutting agricultural land uses, the access road will not provide an impetus for non-agricultural development. While agricultural land uses are generally compatible with airport operations, the South Central Regional Airport Agency, City of Leighton and Mahaska County need to adopt an airport height restriction ordinance (based on FAR Part 77) and develop land use guidelines to ensure the agricultural character of the adjacent land uses are sustainable.
Reasonable Alternative One. Site B Natural resources used in construction are available within the region and are not in short supply. Energy consumed in the construction is not expected to be significantly greater than the energy used to maintain and rehabilitate the pavement infrastructure at the two existing airports. Energy used to construct aircraft storage facilities will not be disproportionately greater given the need to construct additional storage at Pella and to replace structures no longer adequate to accommodate the forecast aircraft mix.
Reasonable Alternative One. Site B New light emissions will be introduced into an area that is absent of light emissions from urban, residential, commercial, institutional, or industrial land uses. The City of Leighton is located within 3,000 feet of the crosswind runway. Runway lighting associated with the crosswind runway will have a less than significant impact on the community. Approaches to the primary runway do not extend over the City. Airfield lighting associated with the primary runway will have no adverse impact on the City of Leighton.
Reasonable Alternative One. Site B Site B is located within the lower Des Moines River watershed. Muchakinock Creek Tributary 11 extends through Site B. The proposed primary runway (Runway 16/34) would extend through the 100-year floodplain associated with the tributary (see Figure 3-3). Mahaska County, in cooperation with the Iowa DNR and USACE, is responsible for permitting any construction activities in floodplains. Mahaska County adopted a floodplain ordinance in 2011 (see Mahaska County Code of 2014 – Chapter 33 – Floodplain Management Ordinance). Provided there is no reasonable alternative to impacting the floodplain, the South Central Regional Airport Agency (SCRAA) will be required to submit a “Joint Application” to the USACE and Iowa DNR to obtain the required regulatory permits to construct in the floodplain associated with Muchakinock Creek Tributary 11. A significant encroachment on the floodplain may potentially have an adverse impact on the floodplain’s natural and beneficial values as well as its value to agriculture. Provided there is no reasonable alternative to avoiding the designated floodplain on Site B, then the following mitigation action may be considered: • Minimizing fill placed in the floodplain while adhering to FAA design standards as set forth in FAA AC 150/5300-13A: Airport Design. • Adherence to Best Management Practices (BMPs) to minimize erosion and sedimentation. • Controlling runoff while ensuring the runoff control measures do not become a wildlife attractant. • Controlling waste and soils disposal to prevent contaminating ground and surface water. Development of the proposed terminal area and the crosswind runway (Runway 3/21) will have no adverse effect on the floodplain provided erosion and sediment control measures are put in place. The National Wetland Inventory (NWI) did not identify wetland areas on Site B. From a review of aerial photographs and soil maps, four (4) potential wetland areas located within drainage xxxxxx were identified. Construction related activities would occur on land for which land had been acquired. It is anticipated that no off-site borrow would be needed. Materials not available on-site would be transported to the site via Iowa Highway 163 and Xxxx Avenue. Construction activity would likely extend over a three to five year period.
