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

T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationTable 5-17Alternative B2: 2020 and 2025 Aircraft Noise-Exposed Housing UnitsHousing Units by DNL value,No-Action Alternative 12020TotalAboveDNL65 dBHousing Units by DNL value,Alternative B2 2,3,4202070 to 65 to60 to70 to 65 to60 to70 to 65 to60 toCity >75 dB 75 dB 70 dB65 dB >75 dB 75 dB 70 dB65 dB >75 dB 75 dB 70 dB65 dBWarwick 0 0 1,052 1,052 4,250 0 15 1,035 1,050 4,437 0 15 -17 -2 187Cranston 0 0 0 0 33 0 0 0 0 164 0 0 0 0 131Total 0 0 1,052 1,052 4,283 0 15 1,035 1,050 4,601 0 15 -17 -2 318TotalAboveDNL65 dBNet Housing Unit ChangeNo-Action Alternative and Alternative B2 2,3,42020SignificantNoiseIncrease 4 -­ -­ -­ -­ -­ 0 3 71 74 -­ 0 3 71 74 -­Housing Units by DNL value,No-Action Alternative 12025TotalAboveDNL65 dBHousing Units by DNL value,Alternative B2 2,3,42025TotalAboveDNL65 dBTotalAboveDNL65 dBNet Housing Unit Change,No-Action Alternative and Alternative B2 2,3,42025TotalAbove>75 dB70 to75 dB65 to70 dBDNL65 dB60 to65 dB0 23 -87 -64 740 0 0 0 11070 to 65 to60 to70 to 65 to60 toCity >75 dB 75 dB 70 dB65 dB >75 dB 75 dB 70 dB65 dBWarwick 0 3 1,411 1,414 4,698 0 26 1,324 1,350 4,772Cranston 0 0 0 0 143 0 0 0 0 253Total0 3 1,411 1,414 4,841 0 26 1,324 1,350 5,025 0 23 -87 -64 184Increase 4 -­ -­ -­ -­ -­ 0 10 39 49 -­ 0 10 39 49 -­SignificantNoiseSource: HMMH, 2011.1 Excludes 280 units which have been purchased under the Completed Part 150 VLAP and 135 units assumed to be purchased by 2015 under the Current Part150 VLAP for a total of 415 acquired housing units.2 All Alternative B2 counts exclude housing units acquired to due non-noise related land acquisition, including 67 housing units (including 40 units outside of the60dB contour in 2020 and five units outside the 60dB contour in 2025) that would be acquired due to construction by 2020, and 134 housing units would beeligible for acquisition due to the newly created RPZ.3 For 2025, the 36 housing units eligible for land acquisition as noise mitigation due to noise impacts in 2020 have been excluded from the impacted unit count.4 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 5-18 summarizes the population that would be exposed to aircraft noise levels of 60 dB and above underAlternative B2 in 2020 and 2025.Significant Aircraft Noise Impacts – 2020 and 2025: Figure 5-12 shows the areas of significant noise impactassociated with Alternative B2 in 2020 and 2025. Under Alternative B2, in 2020, 74 housing units (Table 5-17)and an estimated 174 people (Table 5-18) within the DNL 65 dB and above noise contour are projected toexperience a significant increase in noise levels (increase of at least DNL 1.5 dB at or above DNL 65 dB) andnone would experience a slight to moderate increase (DNL 3.0 dB or more between DNL 60 dB and 65 dB noiselevels). In 2025, 49 housing units (Table 5-17) and an estimated 115 people (Table 5-18) within the DNL 65 dBand above noise contour are projected to experience a significant increase in noise levels and none wouldexperience a slight to moderate increase under Alternative B2. Those housing units exposed to significant noiselevels would be eligible for sound insulation mitigation. Alternative B2 would not result in significant noiseincreases at any non-residential noise-sensitive sites.Chapter 5 - Environmental Consequences 5-27 July 2011\\mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH05_Environmental_Cons_JUL_2011.doc