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<br />1 <br /> <br />Traffic Noise Monitoring <br /> <br />-1 <br />J <br /> <br />Monitoring Point Morning Rush (7-9 a.m.) Evening Rush (4:30-6:30 p.m.) <br /> LIO (dBA) L50 (dBA) LIO (dBA) L50 (dB A) <br />Intersection of 74.24 64.40 69.2 60.0 <br />Cleveland and Co. <br />Rd.D <br />Intersection of 71.3 64.9 71.9 62.4 <br />Cleveland and Co. <br />Rd.C <br /> <br />Noise impacts from post-project traffic volumes were evaluated using the <br />STAMINA 2.0 (FHW A 1982) model provided by MnDOT. STAMINA 2.0 <br />predicts A-weighted noise levels (LEQ, LlO, L50 and L90) based on traffic volume, <br />speed, and vehicle type. For this analysis, vehicles were placed into three <br />categories: cars, medium trucks, and heavy trucks. <br /> <br />As indicated above, the main source of the noise causing the measured exceedances <br />appears to be from Interstate 35W. However, the principal source of any additional <br />noise anticipated to be caused by the proposed development is from additional <br />traffic generated along the roadways surrounding the development, mainly <br />Cleveland, County Road C and County Road D. The nearest residences are located <br />near the intersection of County Road D and Cleveland. Other potentially noise <br />sensitive areas would include any nearby schools, churches or parks, hotels, as well <br />as outdoor restaurants. A hotel (receptor #3) and an office (receptor #4) have been <br />included in the modeling as well. <br /> <br />Only daytime (rush hour) impacts were predicted using STAMINA 2.0. Nighttime <br />noise standards only differ from daytime noise standards in residential areas. <br />Residential areas located in close proximity to the development are not expected to <br />experience significant increases in noise levels. In addition, peak nighttime traffic is <br />assumed to be 78 percent of the peak daytime volume, using MnDOT methods. <br /> <br />,J <br /> <br />MnDOT methods also assume the following vehicle type percentages: <br />· Cars: 97.8 percent; <br />· Medium trucks: 1.4 percent; <br />· Heavy trucks: 0.8 percent. <br /> <br />1 <br />J <br /> <br />Traffic volumes provided by Benshoof and Associates, Inc. were used for the <br />STAMINA 2.0 model runs. <br /> <br />Page 29 <br />