7C, County Road E/T.H. 51 Bridge

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_ _ _ _. _ _ �.� EN HILLS MEMORANDUM DATE : January 11, 2010 TO: Honorable Mayor and City Council Members Sue Iverson, Acting City Administrator FROM: Kristine Giga, Civil Engineer Michelle Olson, Parks and Recreation Manager SUBJECT: County Road E/TH 51 Bridge- Municipal Agreement Program Update Back�round At the August 31, 2009 Regular City Council Meeting, staff received direction from the City Council to prepare an application for funding through Mn/DOT's 2009 Municipal Agreement Program for modifications to the existing County Road E bridge over Snelling Avenue (TH51). The Municipal Agreement Program Application was submitted on September 28, 2009. Staff received comments on this application on December 15, 2009. The comments received identified that Mn/DOT is considering this bridge for an improvement project in FY 2015. Because the bridge is considered functionally obsolete, which means the geometric layout does not meet current standards, this bridge would be reconstructed. City staff and Kimley-Horn representatives met with Mn/DOT on December 29, 2009 to discuss the comments and options on moving forward with improvements to this bridge. This bridge had not been programmed or identified for replacement in the next five to ten years. However, the City's continued efforts in seeking assistance to improve the existing conditions of the bridge have highlighted the existing bridge deficiencies, causing the Mn/DOT bridge maintenance office to move up improvements to this bridge to FY 2015. The comments received from Mn/DOT bridge maintenance staff indicated that the scope of our proj ect would need to be modi� ed due to the condition of the existing concrete. These modifications anticipate the need for additional deck repairs once the bridge overlay is removed. In 1993, when Mn/DOT placed the current overlay, they encountered some deck deterioration. At that time, they decided not to make repairs to the structural bridge deck and simply cover the deck with an overlay. The scope of our current proj ect anticipated doing the same, removing the overlay and replacing it with modifications to the sidewalks. Mn/DOT recommends the City add the repair of the structural deck to our proj ect. This would include adding quantities for partial and full deck thickness repair in the event that we encounter deteriorated areas once the current overlay is removed. I IMetro-inet. us l ardenhills IPR�PW1Parks IMemos I Council Memos 1011110 Municipal Ag�eement Update. doc