7A, Noise Wall for 35W & US Hwy 10 - Resolution 2009-021

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AR —DEN HILLS CITY COUNCIL — August 31, 2009 9 Mr. Brian Lockwood, 1575 Briarknoll Drive, Arden Hills, asked for further clarification regarding the noise levels on Highway 10 and the expected increase in this area. Councilmember Holden asked what the surface overlay for Highway 10 would be and if this would reduce noise in the Briarknoll neighborhood. Mr. Marc Goess, Mn/DOT, stated that the overlay for Highway 10 was bituminous and expected to be done in 2011 at the same time the intersection and grade separation was done. He also stated that any new surface would start at I35W and end at I694. Councilmember Grant clarified that this overlay was funded and part of the project for 2011. Mr. Goess stated that the overlay was separate in the fact that Mn/DOT was doing the overlay but would be done in conjunction with the County's project in this location. Councilmember Grant asked if the overlay would definitely be done in 2011. Mr. Goess stated that at this time it is expected to be done in 2011. Mr. Ramaswamy asked why there were no noise measurements on the east side of Highway 10 and South of County Road 96. He requested to see the data from the noise study that was performed. Councilmember Holden stated that this area was part of the I694 noise study. Mr. Ramaswamy stated that this data is relevant to this construction project. Mayor Harpstead stated that there is set criteria that is used to determine the limits of the noise analysis. Mr. Ramaswamy asked if the sound projections were based on the bituminous overlay that would be installed in 2011. Mr. Hilden stated that the noise from Highway 10 was analyzed and it did not meet the reasonableness criteria and this was related to the required design of the wall. Mayor Harpstead clarified that the noise benefit would be there but the cost effectiveness was not reasonable.