Agenda - Council - 09/22/2020 - Laserfiche WebLink

Home

IV. Noise Impacts - Noise Modeling Results In order to determine the post -development noise impacts from Nowthen Boulevard, SBP used the MINNOISEV31 traffic noise model to determine daytime and nighttime peak noise hour noise levels at selected residential locations in the proposed development. MINNOISEV31 is a modified version of the FHWA noise prediction model STAMINA 2.0. Receptor Locations Noise impacts were modeled at 14 receptors. Seven receptors (RN1-RN7) represent the north side of each of the seven proposed residential buildings facing Nowthen Boulevard, and seven receptors (RS 1-RS7) represent the outdoor use areas on the south side of the buildings. The receptor locations are shown in Figure 1. Traffic and Peak Hour Determination Generally, the highest hours for traffic noise impacts are when heavy truck volumes are high and there is free flowing traffic. In order to determine reasonable worst -case noise impacts on the project, SBP used the 2018 published AADT escalated to 2020 assuming a five percent annual growth rate. Heavy truck percentages were determined from the highest of the two counts conducted during the noise monitoring. The peak hour volume for the daytime (7:00 am to 10:00 pm) noise modeling was assumed to be 8 percent of the calculated 2020 AADT. The peak -hour nighttime (10:00 pm to 7:00 am) volume (typically 6:00am to 7:00am) was assumed to be 6 percent of the calculated 2020 AADT. Modeled Highway Noise Impacts Tables 2 and 3 present the modeled daytime and nighttime peak hour noise level impacts at each of the 9 receptor locations.