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I <br /> <br />ONSULTING <br /> <br />GROUP,, <br /> <br />'I'N C. <br /> <br />Transportation · Civil · Structural · Environmental · Planning · Traffic · Landscape Architecture · Parking <br /> <br />October 9, 2002 <br /> <br />SRF No. ·024616 <br /> <br />Mr: Steve Jankowski, P.E. <br />CITY OF RAMSEY <br />15153 Nowthen Boulevard NW <br />Ramsey, Minnesota 55303 <br /> <br />SUBJECT: NOISE MITIGATION ANALYSIS FOR R. IVENWICK 3RD SUBDIVISION DEVELOPMENT <br />Dear Mr. Jankowski: <br /> <br />The purpose of this letter is to present traffic noise-analysis results, assess the-effectiveness of <br />noise mitigation measures and suggest a reasonable noise mitigation scenario' for the Rivenwick <br />-~ rd <br />~ Subdivision development. <br /> <br />This development is located along the south side of TH 10, west of Garnet Street in Ramsey, <br />Minnesota. The subdivision is located approximately 750 - 900 feet south:of the TH 10 right of <br />way. The local road (Riverdale DriT,,e) and a vacant land parcel' are located between the highway <br />and the development. As shown on the attached plan, eleven eight-unit and four six-unit <br />residential buildings will be built in.the development area. <br /> <br />Noise Analysis <br />Traffic nOise impacts were assessed by modeling noise levels at residential receptor sites, likely <br />to be most affected.by TH. l0 traffic noise. The noise analysis completed for this development <br />analyzed the northern-most row of residential .bUildings (represented by modeling receptors R-l, <br />R-2 and R-3) and the second row of proposed residential buildings (represented by receptor R-4). <br />These noise-modeling receptors were selected to represent, outdoor areas most sensitive to <br />potential traffic noise impacts. <br /> <br />Noise modeling was done using the noise prediction program "MINNOISE", a versi-on of the <br />FHWA "STAMINA" model adapted by Mn/DOTi. This model uses vehiC!e numbers, speed~ <br />class of'vehicle, and. topographical characteristics of the roadway and receptors being analyzed. <br />SRF used the plan produced by Pio'neer Engineering, Inc. t© determine the location of the <br />receptors within the development. Modeling performed for this analysis used the '2005 forecast <br />peak hour traffic volume, of which. 97 percent are automobiles and light trucks, two percent (2%) <br />are medium trucks, and one percent (1%) heavy trucks. This traffic Volume was' used as a <br />"worst-case" scenario to approximate daytime peak traffic noise levels along TH 10 after the' <br />construction of. the development. Posted speed limits were used in the noise model. <br /> <br /> One Carlson Parkway North, Suite 150, Minneapolis, MN. 55447-4443 <br />Telephone (763) 475-0010 J Fax. (763) 475-2429 · http://Www, srfconsulting.com. <br /> <br />An Equal Opportunity Employer <br /> <br /> <br />