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STAFF ORIGINATOR: CITY COUNCIL MEETING DATE: TOPIC: AGENDA ITEM 6E Michael Grochala April 26, 2004 Consideration of Authorizing Lake Study Resolution No. 04-49 Drive /I -35W Interchange ACTION REQUIRED: Simple Majority BACKGROUND As part of the Legacy at Woods Edge development review process, a traffic study prepared by Short, Elliott, Hendrickson, Inc., identified the necessary improvements to Lake Drive that would be required to facilitate development. These improvements included the following: 1. Signalization of Town Center Parkway /Lake Drive intersection and both ramps to I-35W. 2. Realignment of the northbound I -35W ramp. 3. Construction of two southbound left turn lanes between the I -35W bridge and Town Center Parkway. 4. Construction of a southbound left turn lane at the northbound I -35W ramp. 5. Construction of northbound right and left turn lanes at the Town Center Parkway /Lake Drive intersection. While the feasibility study for the proposed improvements, both intemal and external to the Legacy site, is just commencing, the very preliminary cost estimate for the Lake Drive improvements is approximately $2.4 million. It is anticipated that these improvements would be, for the most part, temporary until the reconstruction of the 1- 35W interchange. Because of the estimated cost of the Lake Drive improvements and the recognized need for improving the I -35W interchange, staff is evaluating options to 1) facilitate improvement of the interchange in conjunction with the Legacy project; 2) minimize the extent of reconstruction if the interchange is constructed at a later date; and 3) provide a planning base to pursue county, state and /or federal funding for interchange improvements. Staff has requested a proposal from SEH, Inc., to determine the needed lane configurations and geometry for the Lake Drive /I -35W interchange between Town Center Parkway and Apollo Drive. The proposal includes identifying width requirements