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

T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationIn 2015, Alternative B4 would expose 111 additional housing units (an estimated 260 additional people) than theNo-Action Alternative to noise levels greater than DNL 65 dB. No subsidized housing units will be exposed tonoise levels greater than DNL 65 dB for Alternative B4 in any of the analysis years.Two housing units would be exposed to noise levels DNL 70 dB and above in 2015. For the purposes of this FEISanalysis, it is assumed that these properties would be acquired for noise mitigation between 2015 and 2020; however,it is RIAC’s intention to begin to acquire residential parcels as soon as 2012, subject to availability of funding. Theseunits would be in addition to the units that would already be acquired under the Current Part 150 VLAP.Table 5-21 Alternative B4: 2015 Aircraft Noise-Exposed Housing Units 1Housing Units by DNL value, Housing Units by DNL value, Net Housing Unit ChangeNo-Action Alternative Alternative B4 2 No-Action Alternative and Alternative B4Total Total TotalAbove Above Above70 to 65 to DNL 60 to 70 to 65 to DNL 60 to 70 to 65 to DNL 60 toCity >75 dB 75 dB 70 dB 65 dB 65 dB >75 dB 75 dB 70 dB 65 dB 65 dB >75 dB 75 dB 70 dB 65 dB 65 dBWarwick 0 0 850 850 3,989 0 2 959 961 4,167 0 2 109 111 178Cranston 0 0 0 0 0 0 0 0 0 48 0 0 0 0 48Total 0 0 850 850 3,989 0 2 959 961 4,215 0 2 109 111 226SignificantNoiseIncrease 3 -- -- -- -- -­ 0 2 182 184 -­ 0 2 182 184 -­Source: HMMH, 2011.1 Excludes 280 units previously purchased under the Current Part 150 VLAP and 135 units assumed to be purchased by 2015 under the Current Part 150 VLAP fora total of 415 units.2 All Alternative B4 counts exclude housing units acquired due to non-noise-related land acquisition, including 11 housing units that would be acquired due toconstruction acquisitions for 2015 and 60 housing units would be eligible for acquisition due to the newly created RPZ.3 Represents the number of housing units and non-residential noise-sensitive sites affected by significant noise levels during a specific year and are not cumulative.Table 5-22 summarizes the population that would be exposed to aircraft noise levels of 60 dB and above underAlternative B4 in 2015. In 2015, five people would be newly exposed to noise levels of DNL 70 dB and above,primarily due to the extended Runway 5-23 coming on line.Significant Aircraft Noise Impacts – 2015: In 2015, 184 housing units (Table 5-21) and an estimated 432 people(Table 5-22) and are projected to experience a significant increase in noise levels (increase of at least DNL 1.5 dBat or above DNL 65 dB) and none would experience a slight to moderate increase (DNL 3.0 dB or more betweenDNL 60 dB and 65 dB noise levels). Figure 5-14 shows areas of a significant increase in noise exposure whencomparing Alternative B4 to the No-Action Alternative in 2015. The area exposed to a significant noise impactwould be on either side of Main Avenue on the south side of the Airport. This is due to the start of aircrafttakeoff which would be much closer to the existing Main Avenue than under the No-Action Alternative. Thoseresidences exposed to significant noise levels would be eligible for sound insulation mitigation.Chapter 5 - Environmental Consequences 5-31 July 2011\\mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH05_Environmental_Cons_JUL_2011.doc