My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
CCP 01-21-2003
ArdenHills
>
Administration
>
City Council
>
City Council Packets
>
2000-2009
>
2003
>
CCP 01-21-2003
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
5/8/2007 1:18:07 PM
Creation date
11/14/2006 2:33:55 PM
Metadata
Fields
Template:
General (2)
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
98
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
<br />I <br />I. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />.. <br />I <br />I <br />I <br />I <br />I <br />I <br />-. <br />I <br />I <br /> <br />Noise Level Monitorin!! <br /> <br />Noise level monitoring is commonly performed during a noise study to document existing <br />noise levels at selected receptor loeations. Existing monitored noise levels can be used as a <br />"baseline" against which future scenarios are compared. In addition, when studying future <br />noise levels projected with computer models, monitored noise levels are compared to <br />modeled results for existing eonditions to validate the eomputer modeling techniques and <br />results. <br /> <br />Existing noise levels were monitored at three sites (Rl, R4 and R7) in the project area on <br />July 9,2002. Monitoring site locations were chosen to represent areas of outdoor human <br />aetivity, i.e., residential yards (Figure 14). Noise monitoring results are presented in <br />Table 23. Monitoring results are presented along with the results of computer modeling for <br />existing daytime noise conditions. The computer-modeled results are within <br />o to 2 decibels of the monitored levels; therefore, the computer model can be considered to <br />be a valid predictor of future noisc lcvels. <br /> <br />Noise Modelini; Methodologv <br /> <br />Traffic noise impacts were assessed by modeling noise levels at "sensitive" receptor sites <br />(i.e., existing and future residences) likely to be most affected by changes in traffic <br />volumes and roadway alignment resulting from construction of the proposed project. <br /> <br />Eight noise modeling receptors (Rl - R8) were selected at existing residential properties in <br />the project area to represent those sites most sensitive to potential project-related traffic <br />noise impaets (Figure l4). Modeling was also performed for Cummings Park, which is <br />located north of the Guidant campus and is representcd by R9. All receptor sites are <br />classified within the definition of State of Minnesota Noise Area Classification One <br />(NAC-l). <br /> <br />Noise modeling was done using the noise prediction program "MINNOISE," a version of <br />the FHWA noise model "STAMINA" adapted by MnlDOT and approved by the MPCA. <br />This model uses vehicle numbers, spced, class of vehicle, and thc typical characteristics of <br />the roadway being analyzed. The computations for the proposed improvements were based <br />on existing and projected traffic volumes, existing and proposed traffic speeds, and vehicle <br />class percentages. Projected traffic volumes for peak daytime and nighttime hours one year <br />after completion of the full build out scenario (i.e., year 2020) were used to predict future <br />noise levels. <br /> <br />Noise Modeling Results <br /> <br />Noise modeling results for existing (2002) conditions and for the year 2020 are presented <br />in Tables 23 and 24. Both daytime and nighttime L[o and Lso are shown for the existing <br />(2002) condition and for year 2020 with the two project altematives: No-Build and Build. <br /> <br />Guidant Campus Master Plan <br />Final AUAR and Mitigation Plan <br /> <br />- 50- <br /> <br />January 2003 <br />
The URL can be used to link to this page
Your browser does not support the video tag.