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Table 28 - CSAH 116 Reconstruction Project <br />Davtime - Modeled Proiect Impacts - Commercial/Indus Re ceptors * <br />+. . i, eceploi". <br />'t., ,-� � _ � <br />`� "F as mg ) <br />NQ�se Le els <br />��'(L dBA) � <br />I il <br />Vo Build <br />,Noi Levels <br />(L�o dB1)�„� <br />�"'S <br />�70.6 <br />allo "F3ufl <br />ji crease © M; <br />�x�stmg, � <br />Norse Levels <br />"V (Lin dBA) <br />„.. <br />t ent �.yk <br />�evelop ri <br />ti�Votse Levells <br />(L u dBA) ` <br />w " <br />,.1?bS <br />,Developanen ti <br />lnoreasa,Q�ver <br />C <br />Eizisting `- <br />ois`e) euels . <br />C1 <br />67.3 <br />3.3 <br />70.2 <br />2.9 <br />C3 <br />67.6 <br />70.3 <br />2.7 <br />69.9 <br />2.3 <br />C5 <br />67.6 <br />68.3 <br />0.7 <br />68.8 <br />1.2 <br />C7 <br />67.4 <br />69.5 <br />2.1 <br />70.2 <br />2.8 <br />C2 <br />68.3 <br />72 <br />3.7 <br />72.1 <br />3.8 <br />C4 <br />66.2 <br />69.7 <br />3.5 <br />70.0 <br />3.8 <br />C6 <br />65.9 <br />69.1 <br />3.2 <br />69.5 <br />3.6 <br />C8 <br />69.3 <br />71.5 <br />2.2 <br />72.2 <br />2.9 <br />C10 <br />69.5 <br />72.9 <br />3.4 <br />74.1 <br />4.6 <br />C12 <br />66.4 <br />69.7 <br />3.3 <br />70.6 <br />4.3 <br />C14 <br />62.6 <br />65.6 <br />3.0 <br />66.2 <br />3.5 <br />C16 <br />63.1 <br />65.9 <br />2.8 <br />67.0 <br />3.9 <br />C18 <br />62.3 <br />65.1 <br />2.8 <br />67.2 <br />4.9 <br />C20 <br />57.6 <br />60.1 <br />2.5 <br />60.4 <br />2.8 <br />C22 <br />56.5 <br />58.9 <br />2.4 <br />59.2 <br />2.7 <br />C24 <br />67.41 <br />70.2 <br />2.8 <br />70.1 <br />2.7 <br />Shaded values approach or exceed Federal noise abatement criteria. <br />What does all of this data mean? <br />Because the federal noise criteria would be exceeded at some of the receptor sites along the <br />corridor, noise walls were studied as mitigation measures at these locations. In order to be built, <br />the walls need to meet two criteria: <br />• The wall needs to be feasible -that is, the physical character of the area would allow a <br />wall to be built <br />• The wall needs to be cost - effective. According to state and federal rules, the wall must <br />reduce the noise by at least 5 dBA and the cost per decibel of noise reduction per <br />residence should be equal to or less than $3,250 in order to be cost - effective. <br />Federal noise criteria were exceeded at five locations in the project area. These locations are <br />shown on the next page. The county had its consultant examine the feasibility and cost <br />effectiveness of walls at each of these locations. The analysis determined that noise walls would <br />be feasible and cost - effective at the locations identified as Noise Barrier 1, 2 and 3. Barriers at <br />the sites identified as Noise Barrier 4 and 5 were determined to not be cost - effective. <br />