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Mr. Steve Jankowsici <br />M.r. Bean Olson <br /> <br /> ~00"' <br />Ap~I 29, ~ <br /> Page <br /> <br />Noise Analysis R~.suits -/nd Addition <br /> <br />,,No WaIL <br /> <br /> dBA <br /> <br />Six-Foot Wall <br /> <br />65 <br /> <br />dBA <br /> <br />Wail <br /> <br />3 I 63 <br /> <br />Raducdoa <br /> <br />6a 0 <br /> <br />R-5 I 62 6[ [ 60 [ <br /> <br />Stare DaYm'-ne J 65 65 <br /> 65 <br />Standard <br /> <br />Minnesota Rules Chapter 705t).0030 (Noise Control aeqmremen0 requires municipalities to take <br />reasonable measures to prevent the esrabtisl:wnenr of land use where noise standards would be <br />immediamiy exceeded, upon esrabtisNment of the [and use. Because a relatively short pomon of <br />this development is adjacent co TH 47 and X includes an access road that requires a large gap in a <br />potenthal noise bamer, a noise barrier would Dave tit~te perc:pcibie effect: ou noise levels in ~ke <br />development. Based on the lack of e~%criveness of the smcfied bamem noise mit/garion is eot <br />considered reasonable ar r~is development. Lnsralladon of a barrier would provide visual <br /> ' rxo'm ~e road and may be reasonable on ~ =esthetic basis. <br />screening ~' <br /> <br />r/Vildlife 5ancruar,? 3rd Adamo <br /> <br />Homes in the 3rd Addit/on are [orated more than 300 fe~t fl'.om TH ¢7 and, therefore, are <br />predicted ro exoehence lower noise [eveis. Noise levels will range fi-om 57 ~o 82 dBA, or tkree <br />to eig~hr dBA below state daytime noise standards. Tar noticeable e~ectiveness of noise bamers <br />is qrpically [imked to areas within 300 ~o 400 feet of a roadway, A six- ~o ~en-foot barrier <br />(placed either in rixe Ligbway ~Sghr of way, west of TH 47 or west of rbe wetland) would reduce <br />noise by only one ~o dxree dBA ar receptors in this development (a barely perceptible decrease). <br />Based on these results, noise mitsgation would not be effective at ~e 3rd Addition and is not <br />recommended. <br /> <br />Noise Analysis Results -3rd :-~ddition <br />(result~ ar~ L,u, ,4.-weighted deciheis ~r dBA} <br /> <br />No Wail Six-Foot Wall <br /> <br />Wall <br /> <br />Receptor dBA dBA Reduction dBA Reduction <br />R-6 62 60 2 59 3 <br />R-7 '~ 58 3 <br /> <br />62 <br /> <br />59 <br /> <br />R-8 2 59 3 <br />R-9 57 57 0 56 [ <br />~- i0 59 58 [ 58 t <br />~tare Daytime 65 55 65 <br />Standard <br /> <br />-192- <br /> <br /> <br />