T.F. Green Airport Improvement Program - FEIS Chapters - PVD

T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationDEIS Noise Supporting Attachment A.4, Vehicular Traffic Noise Technical Report provides a detailed assessmentof program-related traffic noise, including detailed tables of computed traffic noise levels for each alternative.Traffic DNLs in 2020 would range from 48 to 76 dB at affected residences throughout the Study Area withAlternative B2. In 2025, the highest traffic DNLs are expected to increase by less than 1 dB over 2020 levels dueto projected growth in area traffic volumes.Under Alternative B2, in addition to the No-Action Alternative, 102 more housing units would be exposed totraffic noise impact for a total of 108 housing units. Table 5-20 summarizes the computed traffic noise levels in2025 in the neighborhoods that would be affected by traffic noise due to the proposed roadway improvements.As shown in the table, Alternative B2 would expose 89 housing units along the north side of Fully RelocatedAirport Road to traffic noise impact by 2025. Alternative B2 also would impact 15 housing units at the east endof Fully Relocated Airport Road, where the reconstructed Lincoln Avenue would tie into the eastbound lanes ofthe new road. Under Alternative B2 in 2025, an additional 141 housing units would be newly exposed to trafficnoise, for a total of 147 housing units.Composite Noise – 2020 and 2025The DNL values at the noise measurement sites (see Figure 4-2) indicate that aircraft flight operations as well asvehicular traffic noise associated with the full relocation of Airport Road would influence the noise environmentin the vicinity of the Airport for 2020 and 2025 under Alternative B2. A complete listing of the composite noiselevels can be found in Appendix F.3, Composite Noise.Significant Composite Noise Impacts: In 2020 and 2025, Sites C6, R4 and R6 would experience a significantnoise increase (increase of at least DNL 1.5 dB at or above DNL 65 dB). Significant noise impacts at Site C6 aredue to Fully Relocated Airport Road; Site R4 is partially due to the extension of Runway 23 End and partiallydue to the addition of the Integrated Cargo facility; and R6 significant noise impact is due to aircraft noise fromextending the Runway 5 End south toward Main Avenue. Sites R4 and R6 are already located within the area ofan increase of at least DNL 1.5 dB at or above DNL 65 dB aircraft flight noise levels. Homes in these areas wouldbe eligible for sound insulation.Site C6 is located between the DNL 60 and 65 dB noise contours and the significant increase in noise is due to theFully Relocated Airport Road. Mitigation in the form of a noise barrier or berm (Number 5 in DEIS Figure F.A 4-12of DEIS Noise Supporting Attachment A.4, Vehicular Traffic Noise Technical Report) is proposed to reduce noiselevels in this neighborhood under Alternative B2. Tables F.3-5 and F.3-6 in Appendix F.3, Composite Noise, present asummary of the composite noise exposure for Alternative B2 from all project-related sources of noise.5.3.4.3 Alternative B4This section presents the results of the noise analysis for Alternative B4 in 2015, 2020, and 2025. Figures 5-5 and5-6 show the modeled flight tracks for Alternative B4.Population and Housing Impacts (Aircraft Noise Exposure) – 2015Figure 5-13 shows the noise contours associated with Alternative B4 in 2015. Table 5-21 summarizes the housingunits that would be exposed to aircraft noise levels greater than DNL 60 dB.Chapter 5 - Environmental Consequences 5-30 July 2011\\mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH05_Environmental_Cons_JUL_2011.doc