Appendix A Noise Study Report - Laserfiche WebLink

Home Browse Search

6. Existina Noise Environment Table 6.5. Model Calibration Monitor No. Measured Noise Level dBA Le Modeled Noise Level dBA Le K-Factor dBA ST-1 63.4 65.6 -2.2 ST-2 63.8 65.5 -1.7 ST-3 64.9 67.9 -3.0 ST-4 67.3 70.5 -3.2 ST-5 65.6 62.8 2.8 ST-6 64.7 62.6 2.1 ST-7 66.7 68.6 -1.9 ST-8 56.7 59.1 -2.4 ST-9 55.7 57.2 -1.5 ST-10 53.3 54.7 -1.4 STA 1 50.0 53.8 -3.8 ST-12 54.5 57.1 -2.6 ST-13 55.7 57.6 -1.9 ST-14 63.0 62.0 1.0 ST-15 1 74.0 73.0 1.0 Source: Compiled by LSA (May 2018). dBA = A -weighted decibel(s) dBA L, = equivalent continuous sound level measured in A -weighted decibels ST = Short -Term All of the monitoring locations were rechecked and noise level measurements and field surveys of existing features and the TNM 2.5 modeled input data were re-examined and determined to be accurate. Therefore, the K-factors shown in Table 6.5 were used to calibrate the noise model. 6.4. Existing Noise Levels The existing a.m. peak -hour traffic volumes obtained from the Traffic Impact Analysis (LSA 2018) or the worst -case traffic operations (prior to speed degradation), whichever were lower, were coded into TNM 2.5 with existing roadway conditions. The a.m. peak -hour traffic volumes were selected over the p.m. peak -hour traffic volumes because the long-term (24-hour) noise level measurements indicate that the peak noise hour occurs during this period. Table B.1 in Appendix B provides the results of the existing traffic noise modeling. Figure 5-1 shows the locations of the modeled receptors. 38 Fairview Street Improvements from 9th Street to 16th Street and Bridge Replacement Project Noise Study Report