Apx_C_Noise_TechReport_Sept_2021
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Apx_C_Noise_TechReport_Sept_2021
Appendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TEC Apx_C_Noise_TechReport_Sept_2021CHNICAL REPORTPrepared forSeattle Department of TransportationZ\J|\ SeattleLj| p Department of1 Transportation44440EXECUTIVE SUMMARYThis technical report presents a noise and vibration study for the RapidRide Roosevelt u District Option being proposed by the Seattle Department of Transportation (SDO Apx_C_Noise_TechReport_Sept_2021T). The RapidRide Roosevelt Project studied in the January 2020 RapidRtde Roosevelt Project Environmental Assessment (‘January 2020 EA‘j has a southerApx_C_Noise_TechReport_Sept_2021
n terminus in Downtown Seattle and a proposed northern terminus at NE 67th St near Sound Transit's Roosevelt Light Rail Station. The u District OptionAppendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TEC Apx_C_Noise_TechReport_Sept_2021trict Station, and a southern terminus in Downtown Seattle. Between Downtown Seattle and the University Bridge the u District Option is unchanged from the RapidRide Roosevelt Project as described in the January 2020 EA. The u District Option north of the University Bridge would have different elemen Apx_C_Noise_TechReport_Sept_2021ts to those studied in the January 2020 EA: as such, the preparation of this supplemental technical report IS necessary to identify any potentially neApx_C_Noise_TechReport_Sept_2021
w noise impacts associated with the u District Option.This technical report examines areas where the u District Option departs from the study area useAppendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TEC Apx_C_Noise_TechReport_Sept_2021 2018) included as Appendix D to the RapidRide Roosevelt Project January 2020 EA (SDOT, 2020).The objective of this technical report is to outline the assessment and report the results of a noise and vibration assessment for the u District Option study area. As directed by the Federal Transit Admini Apx_C_Noise_TechReport_Sept_2021stration (FTA), the noise and vibration assessment for the u District Option IS based upon guidance described in the FTA Transit Noise and Vibration IApx_C_Noise_TechReport_Sept_2021
mpact Assessment (FTA Manual; 2018). It should be noted that the assessment outlined in the 2018 TR was performed in accordance with the previous versAppendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TEC Apx_C_Noise_TechReport_Sept_2021in the study area. These predicted sound levels were added to measured existing sound levels and then compared with FTA impact thresholds. It was determined that none of the receptors within the study area would exceed impact thresholds and are unlikely to be impacted by noise generated by bus opera Apx_C_Noise_TechReport_Sept_2021tions. Similarly, vibration levels from bus operations were predicted at all vibration sensitive receptors within the u District Option study area andApx_C_Noise_TechReport_Sept_2021
then compared with FTA impact thresholds. Again, it was found that none of the receptors would exceed impact threshold and are unlikely to be impacteAppendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TEC Apx_C_Noise_TechReport_Sept_2021 some cases, may have the potential to cause cosmetic building damage to adjacent structures. Noise from construction activities IS predicted to exceed City of Seattle noise criteria. With mitigation and a construction noise control plan, construction activities are likely to satisfy City of Seattle Apx_C_Noise_TechReport_Sept_2021 criteria. Vibration from roadway paving along NE 43rd st between Roosevelt Way NE and 12th Ave NE and jackhammering at stations and ocs pole locationApx_C_Noise_TechReport_Sept_2021
s has the potential to cause cosmetic building damage to adjacent structures. With a vibration control plan and the implementation of mitigation measuAppendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TEC Apx_C_Noise_TechReport_Sept_2021nlikely.This page intentionally left blank.TABLE OF CONTENTSExecutive Summary.......................................................................iTable of Contents............................................................iiiAcronyms and Abbreviations............................................. Apx_C_Noise_TechReport_Sept_2021...........V1.Project Overview.....................................................1-12.Noise and Vibration Criteria..................................Apx_C_Noise_TechReport_Sept_2021
.......................2-12.1Noise Impact Criteria.........................................................2-12.1.1Transit Noise Impact Criteria......Appendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TEC Apx_C_Noise_TechReport_Sept_2021...............................................2-42.2.1Transit Vibration Criteria............................................2-42.2.1Construction Vibration Criteria.......................................2-53.Methodology...................................................................3-13.1Study Ar Apx_C_Noise_TechReport_Sept_2021ea.............................................................3-13.2Existing Noise Conditions..............................................3-13.3OperApx_C_Noise_TechReport_Sept_2021
ational Noise......................................................3-4Appendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TECAppendix cRapidRide Roosevelt Project Supplemental Noise and VibrationTechnical ReportRAPIDRIDE ROOSEVELT PROJECT SUPPLEMENTAL NOISE AND VIBRATION TECGọi ngay
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