2B, I-694 TH 51 Discussion - Laserfiche WebLink

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whatever the costs are above and beyond the $3250 per decibel per benefiting resident. This option has much more uncertainty to the city than does the lump sum option. Please be aware that the installation of approximately 2000 feet of the 3000 foot noise wall will impact existing trees in the area. Some of these trees are mature Oak trees and other areas are very dense clusters of trees. So, the impacts will be very large. 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 I -694 west of the project limits. Mn /DOT response Mn /DOT 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 R/W. The only area where berming can be constructed within the existing R/VV is on the south side of 1- 694 west of old TH 10. Mn /DOT is able to berm in this location while avoiding the area needed for ponding. The berm will be constructed meeting Mn /DOT design standards for clear zone setbacks, drainage requirements and wetland impacts. There will be impacts to mature trees with this berming. Mn /DOT will identify these impacts and requests that these impacts be discussed and agreed to by Arden Hills. 4 The City requests that MnDOT prove that the traffic modeling for the I- 694/TH 51 improvement considered the entire region and the effect the proposed grade separated intersection of TH 10 /CR 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 veil 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. Mn /DOT response Mn /DOT can confirm that the traffic modeling for this project has considered the entire region and the effect the proposed grade separated intersection of TH 10 /CR 96 has on it. In addition, Mn /DOT will prepare an exhibit showing the 2010 traffic counts for the local roadway system for both the no build and the build condition. This exhibit will show the local traffic conditions resulting from both projects. 6 The City requests that MnDO T commit that there are no city costs associated with the proposed improvements necessary on interstate, county or local system (including changes that might be required on County Roads E, F, Hamline Avenue, Lexington Avenue or the junctions An Equal Opportunity Employer