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<br />City of Arden Hills <br />Apri I 9. 2008 <br />Page 2 01'3 <br /> <br />Study Procedures and Findin!!s <br />Noise levels with existing and future (2030) tr<lflic volumes were modeled at 20 locations adjacent to 30 <br />homes along '1'1110 between Coullty Road 96 and 1-694. Noise modeling calculates the amount of <br />potential noise directly related 10 lrnf'lic speeds, traffic mix (vchicle types), <lnd traffic volullles. Future <br />traffic conditions used for noise analysis include growth and development of the Twill Cities region as <br />well as growth within the City of Arden Hills and development of the TCAAP site. Future traffic <br />conditions also incluuc planned rcgionallransporlatioll improvements including 1-694 between I-35W and <br />J-35E. <br /> <br />The noise analysis was prepared to evaluate whether noise balTicrs arc warraJlled,fem;ib/e, and <br />reasoJlable. The noise modeling and analysis was performed according to Federal Highway <br />Administration (FIlW A), Minnesota Department ofTrallsp0l1ation (Mn/DOT), and Minnesota Pollution <br />Control Agency (MPCA) guidelines. This evaluation followed a reasonable planning process and <br />provides realistic noise conditions. Noise barriers, 10' and 20' tall, were considered and evaluated at the <br />folImvjng loc<llions: <br />R.I.. Noise Barrier I -.- 870' long barrier near 5 homes in southwest corner ofTH I O/CR 96 <br />RL Noise Ilarrier 2 2000' long barrier near 11 homes west ofTII ]0 <br />RL Noise Barrier 2EX'!' Barrier 2 extended 1400' soutb near 10 homes sO\lth of Round Lake <br />BKD Noise Barrier - 984' long barrier near 4 homes north of Briarknoll Drive <br /> <br />Existing Conditions - Noise levels today vary betwccn59 dB(A) and 72 dB(A) along TH 10 during the <br />AM and PiV'l rush hours. AI locations wherc noise barriers were considered, existing traffic volumes <br />result in the following noise levels: <br />RL Noise Barrier 1 70 to 72 tlB(A) <br />RL Noise Barrier 2 69to 71 tlll(A) <br />RL Noise Harrier 2EX'!' ... 59 to 69 dll(A) <br />BKD Noise Harrier 6t to 64 dB(J\) <br /> <br /> <br />Future Conditions - Noise levels in the future arc expected to vary between 61 tiB(A) and 74 dB(A) along <br />TH lO with anticipated AM and PM rush hour traffic in the year 2030. At locations where noise barriers <br />were considered, future traffic volumes result in the following Jllticipalcd noise levels \vilh and without <br />barriers: <br /> <br />RL Noise Barrier <br />RL Noise Barrier 2 <br />RL Noise Barrier 2EX'!' <br />BK]) Noise Barrier- <br /> <br />NQ___H,',\,!Ti.~I <br />71-73 dB(J\) <br />71-73 dB(J\) <br />61-70 dB(A) <br />64-67 dll(A) <br /> <br />2Q~JJ<lrr.iGr. <br />62-63 dH(A) <br />61-66 dB(A) <br />57-64 dB(A) <br />60-61 dB(A) <br /> <br />JQ'_Barrier <br />66 dB(A) <br />66-70 dH(A) <br />60-69 dI3(A) <br />63-65 dB(A) <br /> <br />Noise levels arc anticipated to increase by I to 3 dB(A) as traffic VO!UI11CS increase over the next 20 years. <br />\Vhile this incrc<1sc would not he Iloliceable by most people, the existing and anticipated noise levels <br />exceed noise abatemenl criterioll. The FH\\/;\ and !'vIll/DOT criterion levels for noise abatement arc 70 <br />dI3(A) and 69 dB(l\), respectively. As a result, cOllsider;ltions for noise barriers arc warranted at the <br />locations wesl ofTlI 10. Existing and future noise levels at residences 11011h of Briarknoil Drive and cas! <br />01'1'1-110 do not meet criterion levels and therefore consideration of noise barriers is not \\'arrantcd. <br />