Agenda - Council - 06/13/2017 - Laserfiche WebLink

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The noise study completed by the Developer identified one (1) proposed lot that was experience noise levels in excess of maximum allowable decibels under State Rules. The Developer shall amend the plans to increase noise mitigation. Furthermore, almost all receptors used in the study are expected to experience noise levels in excess of maximum allowable decibels in the future. It is the City's responsibility to ensure that the Development takes reasonable measures to avoid noise level exceedances. Staff believes the current bermina and landscanina are a reasonable measure. Staff does not believe a noise wall is necessary at this time. Minnesota Pollution Control Aaencv (MPCA) Staff has raised concern about modelling methodoloav used for existing noise conditions. State Rules are based on one (1) hour time periods. Noise collection was not studied for an entire hour, but modelled/extrapolated from a portion of an hour study period. The City Council has two (2) options. 1. Accept the modelling approach for existing conditions as presented. 2. Require new testing for an entire hour. Note: regardless of concerns raised by testing methodoloav, Staff is not likely to recommend the construction of a full noise wall. Staff would encourage additional landscaping and appropriate species of tree amendments to maximize noise mitigation as a reasonable measure. Action Item: Traffic Study Amend the Preliminary Plat to extend the berm around the impacted lot and provide landscaping or fencing that demonstrates reasonable measure to mitigate the decibel exceedances. Generally speaking, traffic forecasts appear to be acceptable to previous planning efforts. Future planned infrastructure appears to accommodate the development and maintain acceptable levels of service. One node studied in the analysis (Alpine Drive and Hiahwav 10) does forecasts that this node is forecasted to operate at a Level of Service `F', the lowest possible rating. However, it is anticipated that planned improvements of the Hiuhwav 10 Access Planning Study will address this deficiency. The Alpine Drive/Hiahwav 10 Node is an Opportunity/Development Driven priority. Approval of this development will increase the priority of this node. EAW Conclusion Staff believes that all items required of the EAW have been addressed, with actions noted above. However, Staff is still working on final comments on the Traffic Study. While Staff does not believe these outstanding items should hold un the process, there are forecasts and statements that will need to be revised for accuracy, consistency, and clarity. Policy Document It is our mission to work together to responsibly grow our community, and to provide quality, cost- effective ective and efficient government services. Riverstone Addition Planning Division Review April 28, 2017 (Preliminary Plat) Page 10 ofii