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ARDEN HILLS CITY COUNCIL WORK SESSION—APRIL 16, 2012 5 Inspector Serien indicated this could be messaged to the public on the reader boards, but traffic would find new patterns to work around the gridlocked areas. :Public Works Director Maurer stated MnDOT has told the City that with a major road closure in one week, one-third of the traffic follows the detour, one-third would find a new route and one- third goes away (i.e. changes when they commute to work). This would mean the traffic along Lexington Avenue would remain until the end of September. He questioned if the County had considered adjusting the turn signals. He noted the left turn signals were causing the most concern at this time. Inspector Serien explained the County has been reviewing the traffic patterns and understands the high levels will remain through the end of September. He indicated left turn lane closures have not been considered. Councilmember Holden asked if staff had any further information on the traffic study from the potential development in Shoreview. Public Works Director Maurer did not have any information available. Mayor Grant understood that Shoreview was working with Ramsey County on this issue. Councilmember Holden requested Tony Bennett and other County representatives be present at the April 30t' Council meeting to discuss the traffic concerns along Lexington Avenue. Mayor Grant agreed suggesting Public Works Director Maurer have a presentation for the public regarding the planned roadway improvements. City Administrator Klaers suggested MnDOT be invited to the meeting to discuss the issue. Inspector Serien understood the Council's frustrations and stated the Sheriffs Office would continue to work with the City to address the safety concerns along this corridor. He appreciated the Council's time this evening and for the input provided on this issue. C. Townhome Association Drainage Discussion Jane Larson, 4370 Arden View Court, stated she was the president of the Townhouse Villages Townhome Association. She commented she was representing the south association this evening. Public Works Director Maurer provided background information on the townhome association drainage concerns for the Council. He indicated on July 16, 2011, there was a large rain storm event in Arden Hills. After this storm, the City Council hired Bolton & Menk to analyze the existing drainage system in the Townhouse Villages to determine the capacity of the system and if there were improvements that could be undertaken to increase the capacity providing more protection to the area. Public Works Director Maurer explained the findings from Bolton & Menk (BMI) were discussed by the Council in October of 2011. It was noted that BMI's finding was that a 10 year