2D, I-694 TH 51 Interchange Project

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Mayor David Grant February 28, 2011 Page Two Mn/DOT response - Mn/DOT has shown the possible noise wall on our final layout. The funding of the noise wall(if requested by the city), would have been established as a lump sure agreement where the city pays $475,000 towards the design and construction of the noise wall. Based on discussions at our meeting, MnIDOT understands that this noise wall is not being pursued by Arden Hills, so Mn/DOT will remove the noise wall from our construction plans. 3— The City requests that MnDOT commit that fill generated on the project will first stay on the project and be used for sound mitigation berming in all areas where noise walls are not proposed. Additional fill material, if it exists, should be used for berming along both sides of 1-694 west of the project limits. MnIDOT response—MnIDOT has investigated potential berming areas on the project. In looking at berming areas, it is necessary to look at areas that would allow berming within the existing RNV. The only area where berming could be constructed within the existing RIW is on the south side of I- 694 west of old TH 10. MnIDOT would be able to berm in this location while avoiding the area needed for ponding. The berm would be constructed to meet MnIDOT design standards for clear zone setbacks, drainage requirements and wetland impacts. There would be impacts to mature trees with this berming. This berming would NOT provide any noise reduction benefit. Arden Hills stated concern about the lack of noise reduction by the berm and the potential loss of trees,therefore, WIDOT will remove this request from consideration. 4— The City requests that MnDOT prove that the traffic modeling for the 1-6941TH 51 improvement considered the entire region and the effect the proposed grade separated intersection of TH 101CR 96 with the loss of some movements will have on the entire transportation system. Furthermore, the City wants MnDOT modeling to document that the proposed improvement will cause no harm and actually provide benefit to the county and local road system beyond Hamline Avenue, County Road F, Lexington Avenue, County Road E and Lexington Bridge over 1-694. An Equal Opportunity Employer