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Environmental Assessment <br />Determinations and Compliance Findings for HUD -assisted Projects <br />24 CFR Part 58 <br />West Kawili Street SeniorNeteran Housing <br />the project is within the threshold distances for <br />airport and major roadway noise generators. <br />Airport noise contours developed by the State of <br />Hawai'i, Department of Transportation, Airports <br />Division in 1998 and 2002 show that the project <br />parcel is well beyond the noise boundary for a <br />noise range at a maximum of 55 dB generated by <br />activities at the Hilo Airport (see Exhibit A). <br />The State ofHawai `i, Department of <br />Transportation, Highways Division (HDOT <br />Highways) provides publicly accessible roadway <br />information including class types, function, and <br />traffic count data on their website. Kawili Street <br />is classified as an `urban' collector roadway <br />under the HDOT Highways' Federal Aid <br />Functional Classification System Report of2016. <br />Images taken from Google Maps show the speed <br />limit close to the project area to be 35 miles per <br />hour. <br />The annual average daily traffic (AADT) count <br />for Kawili Street near Po `okela Parkway was <br />estimated to be around 8,200 vehicle trips. This is <br />fairly high in comparison with HDOT Highways <br />data, which estimates that collector roadways in <br />urban areas typically have an ADT range <br />between 1,100 and 6,300 vehicles. The Night <br />Fraction ofADT was also unavailable from the <br />collector and on the HDOT Highways' website. <br />Therefore, the estimated nighttime volume of <br />AADT volume was estimated to be 15% of <br />daytime volume, which is consistent with the <br />recommendation provided by the HUD Noise <br />Assessment Guidebook. Based on the effective <br />distance of 150 feet from Kawili Street, the <br />average speed of 35 miles per hour in the segment <br />of Kawili Street closest to the project area, 8,200 <br />average daily trips for Saddle Road, and a <br />nighttime volume of 15% ofAADT; this <br />conservative noise calculation was found to be <br />approximately 60 dB for the roadway noise <br />generator alone, and 610 when combined with <br />airport noise sources. This noise level is well <br />below the acceptable limit of 65 dB. Thus, the <br />project is within the acceptable noise zone.for <br />